CN112504813A - High-temperature bending fatigue in-situ testing device and method - Google Patents
High-temperature bending fatigue in-situ testing device and method Download PDFInfo
- Publication number
- CN112504813A CN112504813A CN202011391324.4A CN202011391324A CN112504813A CN 112504813 A CN112504813 A CN 112504813A CN 202011391324 A CN202011391324 A CN 202011391324A CN 112504813 A CN112504813 A CN 112504813A
- Authority
- CN
- China
- Prior art keywords
- loading
- sample
- bending
- temperature
- point bending
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005452 bending Methods 0.000 title claims abstract description 122
- 238000012360 testing method Methods 0.000 title claims abstract description 110
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000000977 initiatory effect Effects 0.000 claims abstract description 8
- 238000013001 point bending Methods 0.000 claims description 84
- 230000003068 static effect Effects 0.000 claims description 17
- 238000009661 fatigue test Methods 0.000 claims description 10
- 230000009970 fire resistant effect Effects 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 210000000078 claw Anatomy 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 5
- 230000036316 preload Effects 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000000877 morphologic effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a high-temperature bending fatigue in-situ testing device and a method. The electromagnetic resonance loading module can realize high-frequency bending fatigue loading on the tested sample; the hydraulic loading module can realize low-frequency bending fatigue loading on the tested sample; the high-temperature loading module can realize the loading of the tested sample in a high-temperature and variable-temperature environment; the in-situ monitoring module can monitor the characteristics and mechanisms of crack initiation and propagation of the sample; the sample clamping device can realize firm clamping and accurate positioning of the tested samples with different sizes and different shapes. The invention can be used for high-resolution in-situ test of high-temperature bending fatigue performance, and provides a feasible technical means for testing the bending fatigue performance of materials and guaranteeing the service safety in the fields of aerospace, automobile manufacturing, rail transit and the like.
Description
Technical Field
The invention relates to the field of precise scientific instruments, in particular to a high-temperature bending fatigue in-situ testing device and method. The device is based on an electro-hydraulic servo driving technology, an electromagnetic resonance driving technology and a radiation type resistor body indirect heating technology, and realizes high-temperature bending fatigue loading and static and dynamic mechanical load composite loading on a tested sample. And surface deformation damage measurement components and microscopic tissue structure measurement components are integrated, so that parallel accurate in-situ measurement of the microscopic mechanical behavior, the deformation damage mode and the performance evolution rule of the tested sample is realized. The invention provides a high-temperature bending fatigue in-situ testing device by combining an in-situ testing instrument, which can be used for testing high-temperature fatigue, bending fatigue and high-temperature bending fatigue of materials; the invention relates to a function-concentrated fatigue testing machine which can replace a traditional function-single fatigue testing machine.
Background
The metal fatigue fracture phenomenon firstly enters the visual field of people from the 60 th of the 18 th century, and a series of fatigue fracture accidents also happen along with the massive emergence of steam locomotives in the first industrial leather. More large machines such as heavy trucks, automobiles, ships and the like appear in the 19 th century, and the fracture failure of key parts under the action of cyclic load is accompanied; until the second world war, the massive ships that were put into war had severe cracking accidents in cold water, forcing those at that time to really recognize and understand the metal fatigue fracture phenomena.
Therefore, establishing an effective and reliable fatigue testing device and testing method, and ensuring the service safety of materials become the problems which need to be solved urgently at the present stage.
Disclosure of Invention
The invention aims to provide a high-temperature bending fatigue in-situ testing device and method, solves the problems in the prior art, and meets the testing requirements of materials in a plurality of key fields such as aerospace, automobile manufacturing and nuclear industry. The testing device consists of an electromagnetic resonance loading module, a hydraulic loading module, a high-temperature loading module, an in-situ monitoring module and a sample clamping device. The electromagnetic resonance loading module can realize high-frequency bending fatigue loading of a tested material sample at 100-4000 Hz; the hydraulic loading module can realize low-frequency bending fatigue loading of 0.01-100 Hz and 0-10 kN on a tested material sample; the high-temperature loading module can realize the loading of the tested material sample at the high temperature of RT-1100 ℃ and in variable temperature environment; the in-situ monitoring module can monitor the characteristics and mechanisms of crack initiation and propagation of the sample; the sample clamping device can realize firm clamping and accurate positioning of the tested material samples with different sizes and different shapes. The invention can be used for high-resolution in-situ test of high-temperature low-cycle, high-cycle and ultrahigh-cycle bending fatigue performance of materials, has high modularization, multiple functions and wide test frequency range, and provides a feasible technical means for testing the bending fatigue performance of the materials and guaranteeing the service safety in the fields of automobile manufacturing, nuclear industry and the like.
The above object of the present invention is achieved by the following technical solutions:
the high-temperature bending fatigue in-situ testing device comprises an electromagnetic resonance loading module 1, a high-temperature loading module 2, an in-situ monitoring module 3, a hydraulic loading module 4 and a sample clamping device 5, wherein the electromagnetic resonance loading module 1 is rigidly connected with a base 10303 and integrally fixed on the base 10303 to realize fatigue loading on a tested sample; the high-temperature loading module 2 is rigidly connected with the platform 10301, is integrally fixed on the platform 10301 and is arranged right below the weight 10205 to realize high-temperature loading of a sample to be tested; the in-situ monitoring module 3 is rigidly connected with the platform 10301 and arranged beside the observation hole 208 of the high-temperature loading module 2, so that the process of observing and recording cracks on the surface of the tested sample in a fatigue test is realized; the hydraulic loading module 4 is rigidly connected with the platform 10301 through a first connecting plate 407, so that low-frequency loading and static bending preloading of a tested sample are realized; the sample holding device 5 includes a three-point bending sample holding device 501 and a cantilever bending sample holding device 502; the three-point bending sample clamping device 501 is integrally fixed in the high-temperature loading module 2, so that the three-point bending sample 50110 is positioned and clamped; the cantilever bending sample clamping device 502 is integrally fixed in the high-temperature loading module 2, so that the cantilever bending sample 50204 is positioned and clamped.
The electromagnetic resonance loading module 1 is: the lifting mechanism 101 is arranged in the supporting frame 103 and is rigidly connected with the high-frequency loading submodule 102, so that the high-frequency loading submodule 102 can ascend and descend in a certain range along the vertical direction; the high-frequency loading submodule 102 is arranged above the sample clamping device 5, realizes high-frequency fatigue loading on a tested sample, and can also apply static bending preload according to actual test requirements; the supporting frame 103 is used for realizing firm supporting and accurate positioning of each part.
The power source of the lifting mechanism 101 is a three-phase asynchronous motor 10104, the motion is transmitted to a secondary speed reducer 10105 through a coupler and then transmitted to another stepped shaft to drive a turbine in the turbine worm lifter 10101 to rotate, and the worm generates vertical displacement; the disc at the top end of the worm is rigidly connected with the disc at the lower end of the upright column 10103 through a screw, so that the beam 10202 rigidly connected with the upright column 10103 is driven to move up and down, the high-frequency loading submodule 102 rises and falls in a certain range along the vertical direction, and high cycle fatigue loading of a tested sample under different stress ratios is realized.
The high-temperature loading module 2 comprises: the furnace shell 204 is respectively provided with an external guide boss 205 at the upper and lower parts, the fire-resistant layer 207 is respectively provided with an internal guide boss 209 at the upper and lower parts, so as to guide the electromagnetic bending compression bar 10207 and the hydraulic bending compression bar 411 to extend into the high-temperature loading module 2 to load the force of the sample to be tested, and the side wall is provided with an observation hole 208 for observing the change of the sample to be tested in the experimental process. The upper and lower sides of the heat preservation layer 206 are provided with guide through holes for the electromagnetic bending pressure rod 10207 and the hydraulic bending pressure rod 411 to pass through.
The three-point bending sample clamping device 501 is rigidly connected with the refractory layer 207 of the high-temperature loading module 2 through a three-point bending bottom plate 50103 and integrally fixed on the refractory layer 207; the cantilever bend specimen holder 502 has a cantilever bend chassis 50206 of the same dimensional configuration as the three point bend chassis 50103 and can be used interchangeably.
Another object of the present invention is to provide a high temperature bending fatigue in-situ test method, which takes the three-point bending test specimen 50110 as an example when performing the high temperature bending fatigue in-situ test, and comprises the following steps:
step one, mounting of the three-point bending test specimen 50110: horizontally placing the three-point bending test specimen 50110 on the fixed V-shaped block 50106, and screwing the clamping nut 50101 to enable the clamping claws 50105 to clamp the test specimen 50110; tightening the clamping bolt 50111 to enable the movable V-shaped block 50108 to clamp the three-point bending test specimen 50110;
step two, high temperature loading of the three-point bend test specimen 50110: the high-temperature loading of the three-point bending test sample 50110 is realized by a high-temperature loading module 2, the three-point bending test sample clamping device 501 is integrally fixed on the high-temperature loading module 2 through the threaded connection of a three-point bending base plate 50103 and a refractory layer 207, the temperature controller supplies different voltages to the electric heating body 212 to heat the electric heating body, and the high-temperature loading at different temperatures is realized in a heat radiation mode;
step three, loading of the static bending load of the three-point bending test specimen 50110: the loading of the static bending load of the three-point bending test sample 50110 is realized by the hydraulic loading module 4, hydraulic oil pushes the piston rod 408 to linearly move in a single direction, and the piston rod transmits power to the hydraulic bending pressure rod 411 and the hydraulic bending pressure head 412, so that the static bending loading of the three-point bending test sample 50110 is realized;
step four, high-low cycle composite fatigue loading of the three-point bending test specimen 50110: the low-frequency loading of the three-point bending test sample 50110 is realized by a hydraulic loading module 4, and the high-frequency loading is realized by an electromagnetic resonance loading module 1; the frequency of an electric signal input into the electro-hydraulic proportional valve 405 is changed, and the hydraulic oil controls the piston rod 408 to perform reciprocating linear motion, so that 0.01-100 Hz fatigue loading is realized; the vibration exciter 10201, the bow-shaped ring 10203, the support 10204, the weight 10205 and the force sensor 10206 form an electromagnetic vibration excitation system, the electromagnetic vibration excitation system is controlled to vibrate according to a set amplitude and frequency, after resonance, the weight 10205 generates repeated inertia force to act on the three-point bending test sample 50110, and fatigue loading of 100-4000 Hz is achieved; firstly, high-frequency loading is carried out on the three-point bending test sample 50110, then the high-frequency loading submodule 102 is lifted through the lifting mechanism 101, and then low-frequency loading is carried out on the three-point bending test sample 50110, so that high-low cycle composite fatigue loading on the three-point bending test sample 50110 is realized;
step five, in-situ monitoring of the three-point bend test specimen 50110: the in-situ monitoring of the three-point bending test piece 50110 is realized by an in-situ monitoring module 3, a high-speed camera 302 records the process of surface crack initiation of a material in a fatigue test, and a microscope 303 observes the length, width and morphological characteristics of the surface crack generated by the material under fatigue loading.
The invention has the beneficial effects that:
(1) the invention relates to a high-temperature bending fatigue in-situ testing device, which is used for testing high-temperature fatigue, bending fatigue and high-temperature bending fatigue of materials and has centralized functions.
(2) The invention has two loading devices, and can realize the low-frequency bending fatigue loading of 0.01-100 Hz and 10KN and the high-frequency bending fatigue loading of 100-4000 Hz.
(3) The invention has two sample clamping devices, and can realize static three-point bending test and cantilever bending test.
(4) The invention is provided with a high-temperature loading device, and can realize the loading of the tested material sample at the temperature of RT-1100 ℃ in a high-temperature and variable-temperature environment.
(5) The invention has an in-situ testing device, and can monitor the characteristics and the mechanism of the crack initiation and propagation of the sample in situ by using a high-speed camera and a microscope.
(6) The invention relates to a function-concentrated fatigue testing machine which can replace the traditional function-single fatigue testing machine.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.
FIG. 1 is a schematic view of an axial structure of the overall structure of the present invention;
FIG. 2 is a schematic diagram of an axial structure of the electromagnetic resonance loading module of the present invention;
FIG. 3 is a schematic axial view of the lifting mechanism of the electromagnetic resonance loading module according to the present invention;
FIG. 4 is a schematic axial view of a high-frequency loading sub-module of the electromagnetic resonance loading module according to the present invention;
FIG. 5 is a schematic axial view of the electromagnetic resonance loading module supporting frame according to the present invention;
FIG. 6 is a schematic axial view of a high temperature load module (muffle) of the present invention;
FIG. 7 is a schematic cross-sectional view of a high temperature loading module (muffle) of the present invention;
FIG. 8 is a schematic diagram of an in situ monitoring module axial structure of the present invention;
FIG. 9 is a schematic diagram of an axial structure of the in-situ test X-Y mobile device of the present invention;
FIG. 10 is a schematic diagram of the hydraulic loading module axial structure of the present invention;
FIG. 11 is a schematic axial view of a sample holder for three-point bending test according to the present invention;
FIG. 12 is a front view of the sample holder for three-point bending test according to the present invention;
FIG. 13 is a schematic top view of the sample holder for three-point bending test according to the present invention;
FIG. 14 is a schematic axial view of a three-point bend test piece according to the present invention;
FIG. 15 is a schematic axial view of a sample holder for cantilever bending test according to the present invention;
FIG. 16 is a schematic axial view of a cantilever bend specimen according to the present invention;
FIG. 17 is a front view of the overall structure of the present invention;
FIG. 18 is a left side view of the overall structure of the present invention;
fig. 19 to 20 are schematic diagrams of the high temperature loading and bending loading test of the present invention, wherein fig. 19 is a schematic diagram of a three-point bending loading test, and fig. 20 is a schematic diagram of a cantilever bending loading test.
In the figure: 1. an electromagnetic resonance loading module; 2. a high temperature loading module; 3. an in-situ monitoring module; 4. a hydraulic loading module; 5. a sample holding device; 101. a lifting mechanism; 102. a high-frequency loading submodule; 103. a support frame; 10101. a worm gear elevator; 10102. a gear; 10103. a column; 10104. a three-phase asynchronous motor; 10105. a secondary speed reducer; 10106. a bearing seat; 10201. a vibration exciter; 10202. a cross beam; 10203. an arcuate ring; 10204. a support; 10205. a weight; 10206. a force sensor; 10207. an electromagnetic bending compression bar; 10208. an electromagnetic bending press head; 10301. a platform; 10302. a column section bar; 10303 and a base. 201. A handle; 202. a hinge; 203. a furnace door; 204. a furnace shell; 205. an external guide boss; 206. a heat-insulating layer; 207. a refractory layer; 208. an observation hole; 209. an internal guide boss; 210. a threaded hole; 211. a cross-recessed round stud screw; 212. an electric heating body. 301. A high-speed camera mount; 302. a high-speed camera; 303. a microscope; 304. a microscope stand; 305. testing the X-Y mobile device in situ; 30501. an X-direction lead screw nut pair; 30502. a first Y-direction moving platform; 30503, a Y-direction screw nut pair of the microscope; 30504. a first coupler; 30505. a first stepping motor; 30506. a second step motor; 30507. a second coupler; 30508. a step motor III; 30509. a third coupler; 30510. a Y-direction lead screw nut pair of the high-speed camera; 30511. a second Y-direction moving platform; 30512. and (4) moving the platform in the X direction. 401. A protective sleeve; 402. a hydraulic cylinder barrel; 403. an accumulator; 404. a hydraulic line; 405. an electro-hydraulic proportional valve; 406. a valve plate; 407. a first connecting plate; 408. a piston rod; 409. expanding and tightening the sleeve; 410. a force sensor; 411. a hydraulic bending compression bar; 412. and hydraulically bending the pressure head. 501. A three-point bending sample clamping device; 502. a cantilever bending sample holding device; 50101. clamping the nut; 50102. a first support plate; 50103. three-point bending the bottom plate; 50104. a second support plate; 50105. a clamping jaw; 50106. fixing the V-shaped block; 50107. a third support plate; 50108. a movable V-shaped block; 50109. a second connecting plate; 50110. three-point bending the sample; 50111. a clamping bolt; 50112. a socket head cap screw; 50113. a type a common flat bond; 50114. a stud; 50115. a hexagon nut; 50116. a trapezoidal block; 50117. a cylindrical pin; 50118. a stepped shaft; 50119. a cylindrical helical compression spring; 50201. an outer hexagon bolt; 50202. a nut; 50203. a support plate IV; 50204. bending the sample by the cantilever; 50205. a hexagon socket head cap screw; 50206 and cantilever bending bottom plate.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 20, the device and the method for testing the high-temperature bending fatigue in situ of the invention comprise an electromagnetic resonance loading module, a hydraulic loading module, a high-temperature loading module, an in situ monitoring module and a sample clamping device. The electromagnetic resonance loading module can realize high-frequency bending fatigue loading on a tested material sample; the hydraulic loading module can realize low-frequency bending fatigue loading on the tested material sample; the high-temperature loading module can realize the loading of the tested material sample in a high-temperature and variable-temperature environment; the in-situ monitoring module can monitor the characteristics and mechanisms of crack initiation and propagation of the sample; the sample clamping device can realize firm clamping and accurate positioning of the tested material samples with different sizes and different shapes. The invention can be used for high-resolution in-situ test of high-temperature fatigue and bending fatigue performance of materials, has high modularization, multiple functions and wide test frequency range, and provides a feasible technical means for testing the bending fatigue performance of the materials and guaranteeing the service safety in the fields of aerospace, automobile manufacturing, rail transit and the like.
As shown in fig. 1, the high-temperature bending fatigue in-situ testing device of the invention is composed of an electromagnetic resonance loading module 1, a high-temperature loading module 2, an in-situ monitoring module 3, a hydraulic loading module 4, a sample clamping device 5 and the like. Referring to fig. 16 and 17, the supporting frame 103 of the electromagnetic resonance loading module 1 can function to support the whole device; the high-frequency loading submodule 102 is arranged above the sample clamping device 5 and is used for realizing high-frequency fatigue loading on a tested sample and applying a static bending preload according to actual test requirements; the lifting mechanism 101 is arranged in the supporting frame 103 and is rigidly connected with the high-frequency loading submodule 102, so that the high-frequency loading submodule 102 can ascend and descend in a certain range along the vertical direction; the high-temperature loading module 2 is rigidly connected with the platform 10301, and the high-temperature loading module 2 is integrally fixed on a middle boss of the platform 10301 and arranged right below the weight 10205 and used for realizing high-temperature loading of a sample to be tested; the external guide boss 205 is used for guiding the loading of the electromagnetic bending pressure rod 10207, the electromagnetic bending pressure head 10208, the hydraulic bending pressure rod 411 and the hydraulic bending pressure head 412 on the tested sample. The in-situ monitoring module 3 is rigidly connected with the platform 10301, is integrally fixed on the platform 10301 and is arranged beside the observation hole 208, and is used for recording the process of surface crack initiation of the observed sample in a fatigue test and observing the characteristics of the surface crack generated by the sample under fatigue loading, such as length, width, form and the like. The hydraulic loading module 4 is rigidly connected with the platform 10301 through a first connecting plate 407, and is integrally arranged below the platform 10301 to load the bending load of the sample to be tested. The sample holding device 5 includes a three-point bending sample holding device 501 and a cantilever bending sample holding device 502; the three-point bending sample clamping device 501 is rigidly connected with the fire-resistant layer 207 of the high-temperature loading module 2 through a three-point bending base plate 50103 and integrally fixed on the fire-resistant layer 207 to realize positioning and clamping of the three-point bending sample 50110; the cantilever bending sample clamping device 502 is rigidly connected with the fire-resistant layer 207 of the high-temperature loading module 2 through a cantilever bending bottom plate 50206, and is integrally fixed on the fire-resistant layer 207 to realize positioning and clamping of a cantilever bending sample 50204; the three-point bending baseplate 50103 and the cantilever bending baseplate 50206 have the same size and structure, are in threaded connection with the refractory layer 207 and can be installed and detached at any time, so that the three-point bending sample clamping device 501 and the cantilever bending sample clamping device 502 can be replaced and used as required but cannot be used at the same time.
As shown in fig. 2, the electromagnetic resonance loading module 1 of the present invention is composed of a lifting mechanism 101, a high frequency loading submodule 102, a support frame 103, etc.; the lifting mechanism 101 is vertically arranged, integrally fixed on a base 10303 of the supporting frame 103, and rigidly connected with a cross beam 10202 through a stand column 10103, so that the high-frequency loading sub-module 102 can ascend and descend along the vertical direction within a certain range; the high-frequency loading submodule 102 is arranged above the sample clamping device 5 and is used for realizing high-frequency fatigue loading on a tested sample and applying a static bending preload according to actual test requirements; the supporting frame 103 plays a role in supporting and fixing the whole device.
As shown in fig. 3, the lifting mechanism 101 of the present invention is composed of a worm gear lifter 10101, a gear 10102, a column 10103, a three-phase asynchronous motor 10104, a secondary speed reducer 10105, a bearing seat 10106, etc.; wherein, the three-phase asynchronous motor 10104 is connected with the secondary speed reducer 10105 through a coupling; the secondary speed reducer 10105 is connected with the stepped shaft through a coupler; the stepped shaft is in key connection with the gear 10102; bearing seat 10106 is rigidly connected with base 10303 through screws; the worm gear and worm lifter 10101 is rigidly connected with the base 10303 through screws, and a disc at the top end of the worm is rigidly connected with a disc at the lower end of the upright column 10103 through screws; a section of external thread on the shaft shoulder at the top end of the upright column 10103 is matched with the internal thread of the nut, so that the beam 10202 is fixed on the upright column 10103, and the high-frequency loading sub-module 102 can ascend and descend in a certain range along the vertical direction.
As shown in fig. 4, the high frequency loading sub-module 102 of the present invention comprises a vibration exciter 10201, a beam 10202, an arcuate ring 10203, a bracket 10204, a weight 10205, a force sensor 10206, an electromagnetic bending pressure rod 10207, an electromagnetic bending pressure head 10208, etc.; wherein, the beam 10202 is rigidly connected with the vibration exciter 10201 through screws; two ends of the bracket 10204 are respectively and rigidly connected with the beam 104 and the weight 10205 through screws; the lower end of the arched ring 10203 is rigidly connected with a tray in the middle of the bracket 10204 through a screw; the weight 10205 is rigidly connected with the force sensor 10206 through a connecting disc; the internal thread at one end of the force sensor 10206 is matched with the external thread at one end of the electromagnetic bending pressure rod 10207; the electromagnetic bending pressure rod 10207 has an internal thread at one end thereof matched with an external thread of the electromagnetic bending pressure head 10208.
As shown in fig. 5, the support frame 103 of the present invention is composed of a platform 10301, a pillar section 10302, a base 10303, and the like; the upper surface of the platform 10301 is provided with mutually vertical T-shaped grooves, so that the requirement that other modules move and are positioned precisely along the T-shaped grooves can be met, and the integration of other modules is facilitated to be expanded in the later period, so that the overall modular design idea of the device is matched; mutually vertical reinforcing ribs are processed on the lower surface of the platform 10301 to ensure that the platform has higher rigidity; a groove is formed in the middle of the platform 10301 and used for installing and positioning the hydraulic loading module 4. The cross section of the upright column section 10302 is a hollow square, has strong bending and torsion resistance, is rigidly connected with the platform 10301 at the upper part and rigidly connected with the base 10303 at the lower part, is arranged at four square grooves of the base 10303, and is integrally fixed in the middle area of the platform 10301 and the base 10303, so that the other modules are firmly supported. The length and width of the base 10303 are completely consistent with those of the platform 10301, and bosses corresponding to the worm gear lifter 10101, the three-phase asynchronous motor 10104, the secondary speed reducer 10105 and the bearing seat 10106 are arranged on the base 10303, so that accurate installation and positioning are provided for the electromagnetic resonance loading module 1; base 10303 also has a groove corresponding to upright section 10302 to provide precise mounting and positioning for upright section 10302.
As shown in fig. 6 and 7, the high temperature loading module 2 of the present invention is composed of a handle 201, a hinge 202, a furnace door 203, a furnace shell 204, an external guide boss 205, an insulating layer 206, a fire-resistant layer 207, an observation hole 208, an internal guide boss 209, a threaded hole 210, a cross-recessed cylinder head screw 211, an electric heater 212, etc., wherein two sectors of the hinge 202 are respectively and rigidly connected with the furnace door 203 and the insulating layer 206 through the cross-recessed cylinder head screw 211, so as to fix the furnace door 203 on the insulating layer 206 and enable the furnace door 203 to realize the opening and closing functions, and the handle 201 is disposed on the furnace door 203; the furnace shell 204 is nested with the insulating layer 206; the insulating layer 206 and the refractory layer 207 are nested together; the electric heating element 212 is fixed inside the fire-resistant layer 207 and is used for realizing high-temperature heating of the sample to be tested.
As shown in fig. 8 and 9, the in-situ monitoring module 3 of the present invention comprises a high-speed camera support 301, a high-speed camera 302, a microscope 303, a microscope support 304, an in-situ test X-Y moving device 305, an X-direction screw nut pair 30501, a Y-direction moving platform pair 30502, a microscope Y-direction screw nut pair 30503, a coupling pair 30504, a stepping motor pair 30505, a stepping motor pair 30506, a coupling pair 30507, a stepping motor pair 30508, a coupling pair triple 30509, a high-speed camera Y-direction screw nut pair 30510, a Y-direction moving platform pair 30511, an X-direction moving platform 30512, and the like, wherein the microscope 303 is rigidly connected to the Y-direction moving platform pair 02 of the in-situ test X-Y moving device 305305 through the microscope support 304; the Y-direction moving platform I30502 is rigidly connected with a microscope Y-direction screw nut pair 30503 through a screw; the high-speed camera 302 is rigidly connected with the second Y-direction moving platform 30511 through the high-speed camera support 301, and the second Y-direction moving platform 30511 is rigidly connected with the high-speed camera Y-direction screw nut pair 30510 through a screw; the microscope Y-direction screw nut pair 30503 and the high-speed camera Y-direction screw nut pair 30510 are rigidly connected with the X-direction moving platform 30512 through screws; the X-direction moving platform 30512 is rigidly connected with the X-direction lead screw nut pair 30501 through a screw; the first stepping motor 30505 is connected with the Y-direction screw nut pair 30503 of the microscope through the first coupling 30504, the second stepping motor 30506 is connected with the Y-direction screw nut pair 30510 of the high-speed camera through the second coupling 30507, and the third stepping motor 30508 is connected with the X-direction screw nut pair 30501 through the third coupling 30509.
As shown in fig. 10, the hydraulic loading module 4 of the present invention is composed of a protective sleeve 401, a hydraulic cylinder barrel 402, an accumulator 403, a hydraulic pipeline 404, an electro-hydraulic proportional valve 405, a valve plate 406, a first connecting plate 407, a piston rod 408, an expansion sleeve 409, a force sensor 410, a hydraulic bending compression rod 411, a hydraulic bending compression head 412, etc., wherein the protective sleeve 401 is rigidly connected with the hydraulic cylinder barrel 402 through a screw to protect the piston rod at the other end; the valve plate 406 is rigidly connected with the hydraulic cylinder barrel 402 through screws; the electro-hydraulic proportional valve 405 is rigidly connected with the valve plate 406 through a screw; the hydraulic pipeline 404 is connected with the valve plate 406 through a threaded pipe joint and is fixed on the valve plate; an accumulator 403 is mounted on the valve plate 406 for storing energy, emergency hydraulic pressure, as an auxiliary power source; one end of the first connecting plate 407 is rigidly connected with the hydraulic cylinder barrel 402 through a screw, and the other end of the first connecting plate is rigidly connected with the platform 10301, so that the hydraulic loading module 4 is fixed on the platform 10301 of the support frame 103; the external thread at the top end of the piston rod 408 is matched with the internal thread of the expansion sleeve 409, and the expansion sleeve 409 is connected with the force sensor 410 through a connecting rod; one end of the force sensor 410 is internally threaded and is matched with one end of the hydraulic bending pressure rod 411, and the other end of the hydraulic bending pressure rod 411 is internally threaded and is matched with the hydraulic bending pressure head 412.
As shown in fig. 11 to 15, the sample-holding device 5 of the present invention includes a three-point bending sample-holding device 501 and a cantilever bending sample-holding device 502. The three-point bending sample clamping device 501 comprises a clamping nut 50101, a first support plate 50102, a three-point bending bottom plate 50103, a second support plate 50104, a clamping claw 50105, a fixed V-shaped block 50106, a third support plate 50107, a movable V-shaped block 50108, a second connection plate 50109, a clamping bolt 50111, an inner hexagonal cylindrical head screw 50112, an A-shaped common flat key 50113, a stud 50114, a hexagonal nut 50115, a trapezoidal block 50116, a cylindrical pin 50117, a stepped shaft 50118, a cylindrical helical compression spring 50119 and the like, wherein the first support plate 50102, the second support plate 50104 and the third support plate 50107 are rigidly connected with the three-point bending bottom plate 50103 through the inner hexagonal cylindrical head screw 50112; an outer cylindrical surface at the larger shaft diameter end of the stepped shaft 50118 is matched with a corresponding inner cylindrical surface of the first support plate 50102, and key connection is realized through an A-type common flat key 50113; a cylindrical spiral compression spring 50119 is arranged between the smaller end of the shaft diameter of the stepped shaft 50118 and the inner hole 50102 of the support plate; the external thread at the smaller shaft diameter end of the stepped shaft 50118 is matched with the internal thread of the clamping nut 50101; the stepped shaft 50118 is rigidly connected with a trapezoidal block 50116 through a cylindrical pin 50117; the clamping claw 50105 is hinged with the second support plate 50104 through the stud 50114, and the clamping claw 50105 can rotate around the stud 50114 to position and clamp the three-point bending test sample 50110; the internal thread of the hexagon nut 50115 is matched with the external thread at one end of the stud 50114, so that the clamping claw 50105 is prevented from falling off in the rotating process; the fixed V-shaped block 50106 is rigidly connected with the supporting plate III 50107 through pins and screws to realize the positioning of the three-point bending test sample 50110; the movable V-shaped block 50108 is rigidly connected with a second connecting plate 50109 through a pin and a screw, and a second connecting plate 50109 is rigidly connected with a third supporting plate 50107 through a clamping bolt 50111 to clamp the three-point bending test sample 50110; the three-point bending base plate 50103 is provided with an unthreaded hole and can be fixed on the high-temperature loading module 2 through a screw.
As shown in fig. 15, in the two of the sample clamping devices 5 of the present invention, the cantilever bending sample clamping device 502 is composed of an outer hexagon bolt 50201, a nut 50202, a support plate four 50203, an inner hexagon bolt 50205, a cantilever bending bottom plate 50206, etc., wherein the cantilever bending bottom plate 50206 and the three-point bending bottom plate 50103 have the same structural size and can be fixed on the high temperature loading module 2 by screws; the support plate IV 50203 is rigidly connected with the cantilever bent bottom plate 50206 through an inner hexagon bolt 50205; the groove on the support plate IV 50203 is matched with the square structure at one end of the sample, and is rigidly connected with the cantilever bending sample 50204 through the outer hexagon bolt 50201 and the nut 50202, so that the cantilever bending sample 50204 is positioned and clamped.
Referring to fig. 1 to 20, in the high temperature bending fatigue in-situ test method of the present invention, when performing the high temperature bending fatigue in-situ test, a three-point bending test specimen 50110 is taken as an example, and the specific steps are as follows:
the method comprises the following steps: mounting of three point bend test piece 50110. Horizontally placing the three-point bending test specimen 50110 on the fixed V-shaped block 50106, and screwing the clamping nut 50101 to enable the clamping claws 50105 to clamp the test specimen 50110; the clamping bolt 50111 is tightened to cause the movable V-block 50108 to clamp the test piece 50110.
Step two: high temperature loading of three point bend test specimen 50110. The high-temperature loading of the three-point bending test sample 50110 is realized by the high-temperature loading module 2, the three-point bending test sample clamping device 501 is integrally fixed on the high-temperature loading module 2 through the threaded connection of the three-point bending bottom plate 50103 and the refractory layer 207, the temperature controller supplies different voltages to the electric heating body 212 to enable the electric heating body to generate heat, and the high-temperature loading at different temperatures is realized in a heat radiation mode.
Step three: loading of the static bending load of the three point bending test piece 50110. The loading of the static bending load of the three-point bending test sample 50110 is realized by the hydraulic loading module 4, hydraulic oil pushes the piston rod 408 to move linearly in a single direction, and the piston rod transmits power to the hydraulic bending pressure rod 411 and the hydraulic bending pressure head 412, so that the static bending load of the three-point bending test sample 50110 is realized.
Step four: high and low cycle composite fatigue loading of three point bend test specimen 50110. The low-frequency loading of the three-point bending test sample 50110 is realized by a hydraulic loading module 4, and the high-frequency loading is realized by an electromagnetic resonance loading module 1; the frequency of an electric signal input into the electro-hydraulic proportional valve 405 is changed, the hydraulic oil controls the piston rod 408 to perform reciprocating linear motion, and fatigue loading of 0.01-100 Hz can be realized; the vibration exciter 10201, the bow-shaped ring 10203, the support 10204, the weight 10205 and the force sensor 10206 form an electromagnetic vibration excitation system, the electromagnetic vibration excitation system is controlled to vibrate according to a set amplitude and frequency, after resonance, repeated inertia force generated by the weight 10205 acts on the three-point bending test sample 50110, and fatigue loading of 100-4000 Hz can be achieved. The three-point bending test sample 50110 is subjected to high-frequency loading, the high-frequency loading submodule 102 is lifted through the lifting mechanism 101, and then the three-point bending test sample 50110 is subjected to low-frequency loading, so that high-low cycle composite fatigue loading of the three-point bending test sample 50110 is achieved.
Step five: in situ monitoring of three point bend test specimen 50110. The in-situ monitoring of the three-point bending test specimen 50110 is realized by the in-situ monitoring module 3, the high-speed camera 302 can record the process of generating cracks on the surface of the material in a fatigue test, and the microscope 303 can observe the characteristics of the length, the width, the shape and the like of the surface cracks generated by the material under the fatigue loading.
The basic theoretical formula involved in the invention is as follows:
stress-strain formula of (one) three-point bending sample
σ1,max-the maximum bending normal stress, Pa, of the specimen;
M1,zmax-the maximum bending moment of the sample, N · m;
W1,z-bending section factor of the sample;
ε1,max-maximum line strain of the sample;
e-modulus of elasticity.
Stress strain formula of (II) cantilever bending sample
σ2,max-the maximum bending normal stress, Pa, of the specimen;
M2,zmax-the maximum bending moment of the sample, N · m;
W2,z-bending section factor of the sample;
ε2,maxmaximum line strain of the sample.
Basic theoretical formula of high and low temperature loading test
1. The calculation formula of the radiant heat exchange quantity between the ash bodies is as follows:
Q1,2-amount of radiant heat exchange, W;
εs-the system emissivity;
A1surface area of the sample, m2；
Cb-black body radiation coefficient of 5.67W/(m)2·K4)；
T1-the thermodynamic temperature of the furnace chamber surface, K;
T2the thermodynamic temperature of the sample surface, K.
One-dimensional unsteady state heat conduction under a third type of boundary conditions:
Q0＝2δρcθ0 (7)
theta is the excess heat quantity on the surface of the sample, W;
θ0-initial excess heat, W, of the sample surface;
FO-a fourier criterion;
Bi-a pile criterion;
Q0-the initial internal energy per square meter of cross section of the sample, W;
δ — radius of the sample, m;
rho-density of the sample, kg/m3；
c-specific heat capacity, J/(kg. DEG C.);
q-the cumulative heat at the sample surface, W.
Total heat obtained from the sample:
Qtotal＝Q1,2+Q (9)
Qtotaltotal heat gained by the sample, W.
The symbols of the present invention are illustrated as follows:
the above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like of the present invention shall be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a high temperature bending fatigue normal position testing arrangement which characterized in that: the device comprises an electromagnetic resonance loading module (1), a high-temperature loading module (2), an in-situ monitoring module (3), a hydraulic loading module (4) and a sample clamping device (5), wherein the electromagnetic resonance loading module (1) is rigidly connected with a base (10303) to realize fatigue loading of a tested sample; the high-temperature loading module (2) is integrally fixed on the platform (10301) and arranged right below the weight (10205) to realize high-temperature loading of a sample to be tested; the in-situ monitoring module (3) is rigidly connected with the platform (10301), is arranged beside the observation hole (208) of the high-temperature loading module (2), and records the process of crack initiation on the surface of the sample to be tested; the hydraulic loading module (4) is rigidly connected with the platform (10301) through a first connecting plate (407) to realize low-frequency loading and static bending preloading of a tested sample; the sample holding device (5) comprises a three-point bending sample holding device (501) and a cantilever bending sample holding device (502); the three-point bending sample clamping device (501) is integrally fixed in the high-temperature loading module (2) to realize positioning and clamping of the three-point bending sample (50110); the cantilever bending sample clamping device (502) is integrally fixed in the high-temperature loading module (2), and positioning and clamping of the cantilever bending sample (50204) are achieved.
2. The high temperature bending fatigue in-situ test device of claim 1, wherein: the electromagnetic resonance loading module (1) is as follows: the lifting mechanism (101) is arranged in the supporting frame (103) and is rigidly connected with the high-frequency loading sub-module (102) to realize the lifting and descending of the high-frequency loading sub-module (102) along the vertical direction; the high-frequency loading submodule (102) is arranged above the sample clamping device (5) and is used for realizing high-frequency fatigue loading on a tested sample or applying static bending preload.
3. The high temperature bending fatigue in-situ test device of claim 2, wherein: the power source of the lifting mechanism (101) is a three-phase asynchronous motor (10104), the motion is transmitted to a secondary speed reducer (10105) through a coupler and then transmitted to another stepped shaft, and a turbine in the turbine worm lifter (10101) is driven to rotate, so that the worm generates displacement in the vertical direction; the disc at the top end of the worm is rigidly connected with the disc at the lower end of the upright post (10103) through a screw, so that a beam (10202) rigidly connected with the upright post (10103) is driven to move up and down, the high-frequency loading submodule (102) rises and falls along the vertical direction, and high-cycle fatigue loading of a tested sample under different stress ratios is realized.
4. The high temperature bending fatigue in-situ test device of claim 1, wherein: the high-temperature loading module (2) comprises: the upper part and the lower part of a furnace shell (204) are respectively provided with an external guide boss (205), the upper part and the lower part of a fire-resistant layer (207) are respectively provided with an internal guide boss (209) for guiding an electromagnetic bending pressure rod (10207) and a hydraulic bending pressure rod (411) to extend into a high-temperature loading module (2) to load a tested sample, the side wall is provided with an observation hole (208), and the upper part and the lower part of a heat-insulating layer (206) are provided with guide through holes for the electromagnetic bending pressure rod (10207) and the hydraulic bending pressure rod (411) to.
5. The high temperature bending fatigue in-situ test device of claim 1, wherein: the three-point bending sample clamping device (501) is rigidly connected with a fire-resistant layer (207) of the high-temperature loading module (2) through a three-point bending base plate (50103) and integrally fixed on the fire-resistant layer (207); the cantilever bending sample clamping device (502) is provided with a cantilever bending bottom plate (50206) which has the same size structure with the three-point bending bottom plate (50103) and is used alternatively.
6. A high temperature bending fatigue in-situ test method for testing a three-point bending test specimen (50110) is characterized in that: the method comprises the following steps:
step one, installation of a three-point bending test specimen (50110): horizontally placing the three-point bending test sample (50110) on a fixed V-shaped block (50106), and screwing a clamping nut (50101) to enable a clamping claw (50105) to clamp the test sample (50110); tightening the clamping bolt (50111) to enable the movable V-shaped block (50108) to clamp the three-point bending test sample (50110);
step two, high temperature loading of the three-point bending test specimen (50110): the high-temperature loading of the three-point bending test sample (50110) is realized by a high-temperature loading module (2), a three-point bending test sample clamping device (501) is connected with a refractory layer (207) through a three-point bending bottom plate (50103) in a threaded manner and integrally fixed on the high-temperature loading module (2), a temperature controller supplies different voltages to an electric heating body (212) to heat the electric heating body, and the high-temperature loading at different temperatures is realized in a heat radiation manner;
step three, loading of static bending load of the three-point bending test specimen (50110): the loading of the static bending load of the three-point bending test sample (50110) is realized by a hydraulic loading module (4), hydraulic oil pushes a piston rod (408) to linearly move in a single direction, the piston rod transmits power to a hydraulic bending pressure rod (411) and a hydraulic bending pressure head (412), and the static bending loading of the three-point bending test sample (50110) is realized;
step four, high-low cycle composite fatigue loading of the three-point bending test specimen (50110): the low-frequency loading of the three-point bending test sample (50110) is realized by a hydraulic loading module (4), and the high-frequency loading is realized by an electromagnetic resonance loading module (1); changing the frequency of an electric signal input into the electro-hydraulic proportional valve (405), and controlling the piston rod (408) to do reciprocating linear motion by hydraulic oil to realize fatigue loading of 0.01-100 Hz; the vibration exciter (10201), the bow-shaped ring (10203), the support (10204), the weight (10205) and the force sensor (10206) form an electromagnetic vibration excitation system, the electromagnetic vibration excitation system is controlled to vibrate according to set amplitude and frequency, after resonance, repeated inertia force generated by the weight (10205) acts on the three-point bending test sample (50110), and 100-4000 Hz fatigue loading is achieved; firstly carrying out high-frequency loading on the three-point bending test specimen (50110), then lifting up the high-frequency loading submodule (102) through the lifting mechanism (101), and then carrying out low-frequency loading on the three-point bending test specimen (50110), thereby realizing high-low cycle composite fatigue loading on the three-point bending test specimen (50110);
step five, in-situ monitoring of the three-point bend specimen (50110): the in-situ monitoring of the three-point bending test specimen (50110) is realized by an in-situ monitoring module (3), a high-speed camera (302) records the process of crack initiation on the surface of a material in a fatigue test, and a microscope (303) observes the length, width and morphological characteristics of surface cracks generated by the material under fatigue loading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011391324.4A CN112504813A (en) | 2020-12-02 | 2020-12-02 | High-temperature bending fatigue in-situ testing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011391324.4A CN112504813A (en) | 2020-12-02 | 2020-12-02 | High-temperature bending fatigue in-situ testing device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112504813A true CN112504813A (en) | 2021-03-16 |
Family
ID=74969153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011391324.4A Pending CN112504813A (en) | 2020-12-02 | 2020-12-02 | High-temperature bending fatigue in-situ testing device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112504813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514319A (en) * | 2021-05-10 | 2021-10-19 | 吉林大学 | In-situ static-dynamic fatigue mechanical property testing instrument in scanning electron microscope |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883833A (en) * | 2019-03-12 | 2019-06-14 | 吉林大学 | Fatigue of materials Mechanics Performance Testing apparatus and method under stretching-bending combined load |
| CN110441163A (en) * | 2019-09-12 | 2019-11-12 | 吉林大学 | High temperature ultrasonic fatigue in-situ test instrument and test method |
| CN110579404A (en) * | 2019-09-12 | 2019-12-17 | 吉林大学 | In-situ test instrument and method for mechanical property of material under high-temperature complex mechanical load |
| CN111442999A (en) * | 2020-05-06 | 2020-07-24 | 吉林大学 | Six-piece equal-stress three-point bending fatigue testing machine |
| CN111595707A (en) * | 2020-05-18 | 2020-08-28 | 吉林大学 | Material high-low cycle composite fatigue performance in-situ test device and method |
| CN214200923U (en) * | 2020-12-02 | 2021-09-14 | 吉林大学 | High-temperature bending fatigue in-situ testing device |
-
2020
- 2020-12-02 CN CN202011391324.4A patent/CN112504813A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883833A (en) * | 2019-03-12 | 2019-06-14 | 吉林大学 | Fatigue of materials Mechanics Performance Testing apparatus and method under stretching-bending combined load |
| CN110441163A (en) * | 2019-09-12 | 2019-11-12 | 吉林大学 | High temperature ultrasonic fatigue in-situ test instrument and test method |
| CN110579404A (en) * | 2019-09-12 | 2019-12-17 | 吉林大学 | In-situ test instrument and method for mechanical property of material under high-temperature complex mechanical load |
| CN111442999A (en) * | 2020-05-06 | 2020-07-24 | 吉林大学 | Six-piece equal-stress three-point bending fatigue testing machine |
| CN111595707A (en) * | 2020-05-18 | 2020-08-28 | 吉林大学 | Material high-low cycle composite fatigue performance in-situ test device and method |
| CN214200923U (en) * | 2020-12-02 | 2021-09-14 | 吉林大学 | High-temperature bending fatigue in-situ testing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514319A (en) * | 2021-05-10 | 2021-10-19 | 吉林大学 | In-situ static-dynamic fatigue mechanical property testing instrument in scanning electron microscope |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108709793B (en) | Loading device and method for bending-torsion vibration fatigue test | |
| US10444130B2 (en) | Material in-situ detection device and method under multi-load and multi-physical field coupled service conditions | |
| US11635359B2 (en) | Instrument and method for mechanical properties in situ testing of materials under high temperature and complex mechanical loads | |
| CN214200923U (en) | High-temperature bending fatigue in-situ testing device | |
| CN106706440B (en) | High-temperature biaxial synchronous stretching mechanical property testing instrument and testing method | |
| CN104535438B (en) | A kind of all Combined Fatigue Crack Propagation pilot systems of testpieces high temperature height and measuring method | |
| CN109115594B (en) | Device and method for testing mechanical property of fiber reinforced composite material during degradation | |
| CN109883833A (en) | Fatigue of materials Mechanics Performance Testing apparatus and method under stretching-bending combined load | |
| JP2007510151A (en) | Multi-axis universal testing machine | |
| CN108732035B (en) | High-temperature fretting fatigue life testing method for tenon connection structure | |
| CN103512803A (en) | Multi-load and multi-physics coupling material micromechanical performance in-situ testing instrument | |
| CN109060552B (en) | Thermal environment resilience test equipment and test method | |
| CN105158057A (en) | Apparatus and method for testing in-situ triaxial tension fatigue under multi-field coupling | |
| CN104897477A (en) | Bitumen-like material creep test device | |
| Xiao | A review of cruciform biaxial tensile testing of sheet metals | |
| CN109556944B (en) | High-flux mechanical test device | |
| CN114608938A (en) | Variable-temperature fatigue test device | |
| CN112504813A (en) | High-temperature bending fatigue in-situ testing device and method | |
| CN105910919A (en) | High-temperature axial compression testing device and testing method | |
| JP4219095B2 (en) | Compression / shear test method and test apparatus | |
| CN206114448U (en) | Rotating bending fatigue testing machine | |
| CN115979864A (en) | High-temperature reciprocating type friction and wear testing equipment and testing method | |
| Bailey et al. | Fundamental aspects of torsional loading | |
| KR20030071130A (en) | Creep tester | |
| Koundinya et al. | A simple and versatile machine for creep testing at low loads (6–300 N) and on miniaturized specimens: Application to a Mg-base alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |