CN211718023U - Non-contact thermal shock high-temperature mechanical testing device - Google Patents
Non-contact thermal shock high-temperature mechanical testing device Download PDFInfo
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- CN211718023U CN211718023U CN201921898482.1U CN201921898482U CN211718023U CN 211718023 U CN211718023 U CN 211718023U CN 201921898482 U CN201921898482 U CN 201921898482U CN 211718023 U CN211718023 U CN 211718023U
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Abstract
The utility model discloses a non-contact thermal shock high-temperature mechanical testing device, belonging to the field of high-temperature mechanical property testing; the device comprises a base, a mechanical experiment module, a middle cross beam, an outer-cavity upper clamp and a spherical cavity, wherein the spherical cavity is fixed on a guide rail by a cavity support, an upper pull rod, an upper vacuum corrugated pipe, a vacuum gauge, an infrared lamp heating module, a laser heating module, a sample introduction door with an observation window, an infrared temperature measurement module, a dynamic test module, a vacuum air exhaust module, an air inlet module, a lower pull rod and a lower vacuum corrugated pipe are arranged on the spherical cavity, and a extensometer, the inner-cavity upper clamp, the inner-cavity lower clamp and a test piece are arranged in the spherical cavity; the device can provide a freely switched thermal load environment, a vacuum or inert gas environment and a laser thermal shock environment, is convenient to assemble and disassemble, and has high flexibility and sealing performance; dynamic and multi-angle observation can be realized.
Description
Technical Field
The utility model belongs to the experimental facilities field of high temperature material, concretely relates to non-contact thermal shock high temperature mechanics testing arrangement can realize test environment such as laser shock, high temperature, vacuum, inert gas.
Background
With the strategic technical development of hypersonic speed spacecraft, high thrust-weight ratio engines and the like, the research on the mechanical problem of a material structure in a high-temperature extreme environment (particularly a high-temperature oxidation environment above 2000 ℃) provides a series of challenging problems which need to be solved urgently. The high-temperature three-dimensional stress state of the material under the high-temperature extreme condition, the micro-nano structure evolution and the dynamic behavior of an atom-electron system have important influences on the service performance of the structure, the damage resistance of a functional system and the like. However, the mechanical property and structural property tests of the standard sample are directly carried out in the high-temperature extreme environment, which is difficult and expensive, especially in the temperature range above 2000 ℃; the corresponding theoretical analysis method and means lack experimental support, so a high-temperature experimental device capable of simulating a real thermal field environment needs to be developed.
Chinese patent document CN 108344644 a discloses a "high temperature tensile experimental apparatus and method thereof in 2018, 7/31, which mainly includes a static loading system, a sample clamping system, a sample heating system, a graph collecting system, etc., wherein the heating system adopts a resistance heating mode and uses a thermocouple to measure temperature, and can capture the damage and deformation of a sample under a high temperature tensile load; chinese patent document CN 208140498U discloses a "high-temperature multi-load loading in-situ test device" in 2018, 11/23, which mainly includes a high-temperature loading module, a multi-load loading module, an in-situ observation module, and a support module, and can implement a multi-load loading test in a vacuum or inert gas environment, and a high-temperature heating furnace inductively heats a graphite heating element through an induction coil; chinese patent document CN 108760525 a discloses "an in-situ ultra-high temperature tensile experimental apparatus based on a computer tomography system" in 2018, 11/6, which mainly includes a test system for in-situ observation of an ultra-high temperature tensile sample, a load loading system, a load control system, a heating system, a temperature measurement system, a shielding gas apparatus for simulating a gas environment under a sample service condition, and the like, wherein the heating system adopts a resistance heating mode and uses infrared temperature measurement.
The above device is comprehensively analyzed, and the above existing detection device has the following defects: 1) the device adopts a resistance furnace, a graphite furnace and the like for heating, the heating area is large, the power consumption is high, and the experimental clamp is arranged in the high-temperature area, so that the material selection and the design are difficult; the high-temperature induction furnace is adopted for heating, only a high-conductivity sample can be heated, and the interchangeability and the adaptability of an induction part are poor, so that the induction part is not suitable for being applied to test pieces and composite materials with complex shapes; 2) at the same time of mechanical testing, test experiments such as thermal shock, thermal fatigue, laser damage and the like are difficult to be synchronously performed; 3) for experiments such as fracture and the like, only cuts and prefabricated cracks can be preprocessed, and local controllable damage cannot be introduced in the test; 4) the heating part cavity is large and sealed, so that an observation window is small, and multi-angle real-time observation is difficult to realize.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a non-contact thermal shock high temperature mechanics testing arrangement, it can provide conventional thermal load environment, vacuum or inert gas environment and laser thermal shock environment to these complex environment can be applyed simultaneously and freely switch, have the high characteristics of flexibility.
The utility model discloses the technical problem that will solve is realized through following technical scheme:
a non-contact thermal shock high-temperature mechanical testing device comprises a base 11 and a mechanical experiment module 1 fixed on the base 11; the mechanical test module 1 and the base 11 form a cavity, a middle cross beam 2 is transversely arranged in the cavity, and two ends of the middle cross beam 2 are fixedly connected with the mechanical test module; two symmetrical guide rails 7 are longitudinally arranged in the cavity, one ends of the two guide rails 7 are fixedly connected with the mechanical test module, and the other ends of the two guide rails 7 are fixedly connected with the base 11; an outer cavity upper clamp 3 is fixedly arranged below the middle cross beam 2, and an outer cavity lower clamp 10 is correspondingly arranged on the upper surface of the base 11;
the spherical cavity 15 is connected with the two guide rails 7 in a sliding manner through a cavity support 16, and two ends of the cavity support 16 are connected with the guide rails 7 in a sliding manner, slide up and down along the guide rails 7 and can be locked at any position of the guide rails 7; the spherical cavity 15 is a hollow spherical cavity, and the upper vacuum bellows 13 and the lower vacuum bellows 18 are symmetrically arranged on the spherical cavity 15 and are hermetically connected with the spherical cavity 15 through flanges; a penetrating upper pull rod 12 is arranged in the upper vacuum corrugated pipe 13, one end of the upper pull rod 12 is matched with the outer upper clamp 3, and the other end of the upper pull rod is in threaded connection with the inner upper clamp 19; a lower pull rod 9 penetrating through the lower vacuum corrugated pipe 18 is arranged in the lower vacuum corrugated pipe; one end of the lower pull rod 9 is matched with the outer cavity lower clamp 10, and the other end of the lower pull rod is in threaded connection with the inner cavity lower clamp 22; the spherical cavity 15 is respectively connected with the vacuum gauge 4, the infrared heating module 5, the laser heating module 6, the infrared temperature measuring module 23, the dynamic testing module 24, the vacuum pumping module 8, the air inlet module 17 and the sample inlet door 14 through flanges penetrating through the surface of the spherical cavity 15; the sample inlet door 14 is provided with an observation window, and the air inlet module 17 is provided with a flowmeter;
the inside of the spherical cavity 15 is provided with an intracavity upper clamp 19 and an intracavity lower clamp 22 which are matched, the test piece 21 is positioned between the intracavity upper clamp 19 and the intracavity lower clamp, and the inner wall of the spherical cavity 15 is also fixedly provided with an extensometer 20.
Furthermore, sixteen flanges penetrating through the surface of the spherical cavity 15 are arranged on the spherical cavity 15, wherein four middle flanges are symmetrically arranged on the spherical cavity 15, the spherical cavity 15 is divided into an upper part and a lower part which are symmetrical by the four middle flanges (namely the four middle flanges), the top end of the upper part of the spherical cavity 15 is provided with a top end flange, and the top end flange is hermetically connected with the upper vacuum bellows 13; the bottom end of the lower part of the spherical cavity 15 is provided with a bottom end flange which is hermetically connected with the lower vacuum bellows 18; four upper flanges are symmetrically arranged at the upper part of the spherical cavity 15; four lower flanges are symmetrically arranged at the lower part of the spherical cavity 15; the two side flanges are symmetrically arranged at the lower part of the spherical cavity 15 and are positioned at two sides of the lower vacuum bellows 18.
Further, the four middle flanges are respectively connected with a laser heating module 6 (for introducing emergent laser), an infrared temperature measuring module 23 (for measuring temperature through infrared and colorimeters), a sample inlet door 14 (for rapid sample inlet and observation of the test piece 21), and a dynamic test module 24.
Further, the two side flanges are connected with the air intake module 17 and the vacuum pumping module 8, respectively.
Furthermore, the model of the middle flange is CF100, the model of the top end flange and the model of the bottom end flange are CF32, the model of the upper flange and the model of the lower flange are CF63, and the model of the side flange is CF 15.
Further, the heating system is composed of an infrared heating module 5 and a laser heating module 6. The infrared heating module 5 includes at least one infrared lamp, and may also be composed of one set, two sets, four sets or more focusing infrared lamp sets. The focus of the infrared lamp is focused on the heating portion of the test piece 21. The focusing infrared lamp is a common commercial product, for example, a HT60 infrared lamp with a water-cooling radiator of 150W-450W can be used, the infrared lamp is powered by a commercial constant-current power supply, and the power of the focusing infrared lamp is adjusted by controlling the power supply in real time through a Labview program (or other conventional methods or programs in the field). The focusing infrared lamp is confocal at the sample heating part, can carry out infrared heating to the sample of placing at the cavity centre of sphere. The infrared lamp radiator is connected with a conventional water cooling machine with the flow rate of more than 10L/min through a 6mm water pipe, so that the temperature of each connecting part in the heating process is always in a safe range. The heating temperature of the infrared module can reach 1650 ℃ at most.
The laser heating module 6 consists of a carbon dioxide laser 27, a reflector 26 and an adjustable ZnSe focusing mirror 25, wherein the carbon dioxide laser 27 is a commercial product, such as NT1000SM or NT2000SM model of Nanjing Guangkong Nuotai company, the reflector 26 and the ZnSe focusing mirror 25 form an L-shaped light path, and the outer wall of the light path is protected by a stainless steel sleeve to prevent laser leakage; the ZnSe focusing mirror 25 is provided with a fine adjustment structure for adjusting the position in the XYZ three directions, and the laser beam focused by the ZnSe focusing mirror is introduced to the sample part through a middle flange of the spherical cavity 15.
Further, the environment control system comprises a vacuum pumping module 8 and an air intake module 17, wherein the vacuum pumping module 8 is a composite pumping system commonly used in the field, such as an edward T-Station 85 turbo molecular pump set including a mechanical pump, a molecular pump and a composite vacuum gauge; the air intake module 17 comprises an electromagnetic valve and a proton flow meter, the proton flow meter is a conventional flow meter, such as a seven-star Huachun D07 flow meter, and the air intake flow can be accurately controlled at sccm level according to the test requirements.
The utility model discloses what adopt the heating methods of test piece is infrared lamp heating and laser heating. The two heating modes belong to non-contact local heating, and can be used respectively or simultaneously to reach higher heating temperature.
In addition, 4 CF63 flanges are symmetrically distributed at the lower part of the spherical cavity 15, and more infrared lamps can be installed or used for other extension purposes.
When the laser heating module 6 works, the heating temperature range can cover the interval from room temperature to more than 2000 ℃ by controlling the power, the frequency and the focus size of the laser, and the test piece can be subjected to heat pulse impact test. The environment control system equipped with the experimental device can realize 10 when the experimental device is not filled with gas-4pa.
Among the modules, the mechanical experiment module 1, the middle cross beam 2, the guide rail 7, the base 11, the cavity bracket 16 and the like are made of conventional steel (45 or 40Cr) or stainless steel (302 or 304); the vacuum cavity, the vacuum corrugated pipe and the flange are made of 304 stainless steel, the flange is sealed by an oxygen-free copper gasket, and a flange window body is made of quartz glass or ZnSe glass. Tungsten steel (YG15 or YG20C) or high temperature alloy (GH4145 or GH4049) is used as the intracavity clamp.
The utility model provides a spherical cavity 15 is connected with the experiment machine through cavity support 16, because the cavity itself does not receive very big external load, so connect and satisfy the intensity requirement to can conveniently realize installing and removing. The spherical design can reduce mutual interference of the modules in space positions to the maximum extent, and the cavity body has higher mechanical strength. Each working module is tightly connected with the cavity through a flange, so that the vacuum degree in the test process is ensured to the maximum extent. The utility model provides a material of sample installation door and window is high temperature resistant glass, and the glass window has guaranteed that the relevant method of digit figure that can use non-contact carries out the developments normal position to the sample in big angle range and has surveyd.
Compared with the existing experimental device, the non-contact thermal shock high-temperature mechanical testing device provided by the application has the following advantages
1. This application experimental apparatus adopts focusing infrared and laser non-contact heating, makes the hot portion can concentrate on the sample test piece region, has reduced whole consumption and the cooling degree of difficulty, makes high temperature mechanical testing can use conventional anchor clamps, has increased the test flexibility.
2. By changing parameters such as focusing, pulse frequency, power and the like of infrared and laser, rapid thermal shock, thermal fatigue and laser damage experiments can be simultaneously carried out in dynamic mechanical tests such as stretching, compression, fatigue and the like, and the problem that the existing device cannot synchronously carry out the tests is solved.
3. For a test sample, besides a prefabricated notch and a prefabricated crack are used for a fracture failure experiment, a focused laser can be used for cutting the sample in the stretching experiment process to introduce local failure, and a dynamic failure test is performed.
4. The non-contact heating makes the heat portion concentrate on the cubic centimeter-level space, and the whole vacuum environment cavity can be provided with a large number of observation windows, so that the multifunctional, multi-angle and real-time observation is realized.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a vertical partial cross-sectional view of a spherical experimental chamber;
FIG. 3 is a transverse cross-section and laser path diagram of a spherical test chamber;
FIG. 4 shows a Labview program for controlling infrared lamps
In the figure: 1-a mechanical experiment module, 2-a middle cross beam, 3-an outer cavity upper clamp, 4-a vacuum gauge, 5-an infrared lamp heating module, 6-a laser heating module, 7-a guide rail, 8-an air exhaust module, 9-a lower pull rod, 10-an outer cavity lower clamp, 11-a base, 12-an upper pull rod, 13-an upper vacuum bellows, 14-a rapid sample introduction door with an observation window, 15-a spherical cavity, 16-a cavity support, 17-an air inlet module with a flowmeter, 18-a lower vacuum bellows, 19-an inner cavity upper clamp, 20-an extensometer, 21-a test piece, 22-an inner cavity lower clamp, 23-an infrared temperature measurement module, 24-a dynamic test module, 25-a laser focusing lens group and 26-a laser reflector, 27-laser generator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1 focused Infrared Lamp experiments
Fig. 1 is a schematic diagram of the overall structure of a non-contact thermal shock high temperature mechanical testing apparatus of the present invention. As can be seen from fig. 1, the non-contact thermal shock high temperature mechanical testing device comprises a base 11 and a mechanical test module 1 fixed on the base 11, a cavity is formed between the mechanical test module 1 and the base 11, a middle cross beam 2 is transversely arranged in the cavity, and both ends of the middle cross beam 2 are fixedly connected with the mechanical test module; two symmetrical guide rails 7 are longitudinally arranged in the cavity, one end of each guide rail 7 is fixedly connected with the mechanical test module, and the other end of each guide rail 7 is fixedly connected with the base 11; an outer cavity upper clamp 3 is fixedly arranged below the middle cross beam 2, and an outer cavity lower clamp 10 is correspondingly arranged on the upper surface of the base 11; the spherical cavity 15 is respectively connected with the two guide rails 7 in a sliding manner through a cavity support 16, and two ends of the cavity support 16 are respectively connected with the guide rails 7 in a sliding manner, slide up and down along the guide rails 7 and can be locked at any position of the guide rails 7;
as shown in fig. 2, the spherical cavity 15 is a hollow spherical cavity, and the upper vacuum bellows 13 and the lower vacuum bellows 18 are symmetrically arranged on the spherical cavity 15 and are both connected with the spherical cavity 1) in a sealing manner through flanges; a penetrating upper pull rod 12 is arranged in the upper vacuum corrugated pipe 13, one end of the upper pull rod 12 is matched with the outer upper clamp 3, and the other end of the upper pull rod is connected with the inner upper clamp 19 in a threaded mode; a lower through pull rod 9 is arranged in the lower vacuum corrugated pipe 18, one end of the pull rod 9 is matched with the outer lower clamp 10, and the other end of the pull rod 9 is connected with the inner lower clamp 22 in a threaded mode; the spherical cavity 15 is respectively connected with the vacuum gauge 4, the infrared heating module 5, the laser heating module 6, the infrared temperature measuring module 23, the dynamic testing module 24, the vacuum pumping module 8, the air inlet module 17 and the sample inlet door 14 through flanges penetrating through the surface of the spherical cavity 15; the sample inlet door 14 is provided with an observation window, and the air inlet module 17 is provided with a flowmeter; the inside of the spherical cavity 15 is provided with an intracavity upper clamp 19 and an intracavity lower clamp 22 which are matched, the test piece 21 is positioned between the intracavity upper clamp 19 and the intracavity lower clamp, and the inner wall of the spherical cavity 15 is also fixedly provided with an extensometer 20.
In this embodiment, sixteen flanges penetrating the surface of the spherical cavity 15 are arranged on the spherical cavity 15, wherein four middle flanges are symmetrically arranged on the spherical cavity 15, and divide the spherical cavity 15 into an upper part and a lower part which are symmetrical (i.e. four middle flanges), the top end of the upper part of the spherical cavity 15 is provided with a top end flange, and the top end flange is hermetically connected with the upper vacuum bellows 13; the bottom end of the lower part of the spherical cavity 15 is provided with a bottom end flange which is hermetically connected with the lower vacuum bellows 18; four upper flanges are symmetrically arranged at the upper part of the spherical cavity 15; four lower flanges are symmetrically arranged at the lower part of the spherical cavity 15; the two side flanges are symmetrically arranged at the lower part of the spherical cavity 15 and are positioned at two sides of the lower vacuum corrugated pipe (18); the two side flanges are respectively connected with the air inlet module 17 and the vacuum pumping module 8; the model of the middle flange is CF100, the models of the top end flange and the bottom end flange are CF32, the models of the upper flange and the lower flange are CF63, and the model of the side flange is CF 15. The four middle flanges are respectively connected with a laser heating module 6 (used for introducing emergent laser), an infrared temperature measuring module 23 (used for measuring temperature through infrared and colorimeters), a sample introduction door 14 (used for rapid sample introduction and observation of a test piece 21) and a dynamic test module 24. In the specific implementation, a plurality of flanges may be disposed on the surface of the spherical cavity 15 according to the actual experimental requirements.
In the embodiment, the heating module 5 comprises 4 sets of focusing infrared lamps (type HT60 of Heat-tech company, power is 150W-450W), the power of the infrared lamps is adjusted by a Labview program, and an infrared lamp radiator is connected with a conventional water cooling machine with the flow rate of more than 10L/min through a 6mm water pipe so as to ensure that the temperature of each connecting part is always in a safe range in the heating process. The heating temperature of the infrared module can reach 1650 ℃ at most.
The laser heating module 6 consists of a carbon dioxide laser 27, a reflector 26 and an adjustable ZnSe focusing mirror 25, wherein the carbon dioxide laser 27 is purchased from Nanjing Guankenotai NT1000SM model, the reflector 26 and the ZnSe focusing mirror 25 (purchased from Thorlabs) form an L-shaped light path, and the outer wall of the light path is protected by a stainless steel sleeve to prevent laser leakage; the ZnSe focusing mirror 25 is provided with a fine adjustment structure for adjusting the position in the XYZ three directions, and the laser beam focused by the ZnSe focusing mirror is introduced to the sample part through a middle flange of the spherical cavity 15.
In this embodiment, the vacuum pumping module 8 adopts an edward T-Station 85 turbo molecular pump set including a mechanical pump, a molecular pump, and a composite vacuum gauge; the air intake module 17 adopts a proton flow meter (seven-star creative D07, including an electromagnetic valve and a controller), and can accurately control the air intake flow at sccm level according to the test requirements.
The lower part of the spherical cavity (15) is provided with 4 CF63 flanges which are symmetrically distributed.
In this embodiment, the mechanical experiment module 1, the middle cross beam 2, the guide rail 7, the base 11, the cavity support 16 and the like are all made of 304 stainless steel; the vacuum cavity, the vacuum corrugated pipe and the flange are made of 304 stainless steel, the flange is sealed by an oxygen-free copper gasket, the flange window body is made of quartz glass, and the clamp in the cavity is made of tungsten steel (purchased from san Xin of Tanzhou).
As shown in fig. 3, the test piece 21 of the present embodiment is a rod-shaped test piece.
The use process of the device is as follows:
1) opening a rapid sampling door 14 with an observation window, and selecting a proper cavity inner upper clamp 17 and a proper cavity inner lower clamp 19 to be respectively assembled on the upper pull rod 12 and the lower pull rod 9 according to the shape and the size of a test piece 21; installing a test piece 21 according to experimental requirements, respectively clamping an upper clamp 17 in the cavity and a lower clamp 19 in the cavity at two ends of an experimental section of the test piece 21, then enabling a extensometer 20 to abut against the test piece 21 through an extensometer adjusting bracket, connecting the extensometer 20 with a computer host, and closing a rapid sampling door 14 with an observation window.
2) Starting the vacuum pumping module 8 to pump the spherical cavity 15, and starting the mechanical pump and the molecular pump in sequence until the vacuum degree in the cavity is stabilized to 10-4pa or so.
3) And starting the infrared lamp heating module 5, and adjusting the focal lengths of the four infrared lamps in a low-power state to focus the four infrared lamps to a middle test area of the test piece 21.
4) Starting the mechanical experiment module 1, operating the loading system and applying prestress to the test piece 21.
The infrared lamp driving power supply is controlled by a Labview program (programming of the Labview program used in the embodiment is shown in figure 4) to gradually increase the current to heat the test piece 21, and meanwhile, the infrared temperature measuring device 23 monitors the temperature of the test piece 21 in real time.
And when the temperature of the test piece 21 is stabilized to 1000 ℃, operating the loading system, carrying out tensile loading on the test piece 21, stopping loading after the measurement is finished, closing each module, and analyzing experimental data.
Other conventional methods or procedures may also be used for controlling the temperature of the infrared lamp in a particular application.
Example 2 laser experiment
This example differs from example 1 in the experimental environment and heating regime. After the spherical cavity 15 is vacuumized, the air inlet module 17 with the flow meter is started, and argon is filled into the spherical cavity 15 until the air pressure reaches 10-2pa。
The infrared lamp heating module is not used, and only the laser heating module is used. And starting the laser heating module 6, adjusting the laser light path in a visible light mode, and adjusting the focal length of the laser in a low-power state to focus the laser to the test area of the test piece 21. The laser driving power supply is remotely controlled by the computer, the laser output power is gradually increased to 600W in a continuous output mode, meanwhile, the infrared temperature measuring device 23 and the colorimeter monitor the temperature of the test piece, and after the temperature reaches 1600 ℃, the laser keeps the temperature in a pulse mode and conducts mechanical test.
The rest of the present example and the experimental procedure were the same as in example 1.
Example 3 Infrared-laser synchronous heating experiment
The experimental apparatus of this example is the same as that of example 1 except that the test piece 21 is heated using both the infrared module 5 and the laser module 6 in the experimental step.
And starting the infrared lamp heating module 5, and adjusting the focal lengths of the four infrared lamps in a low-power state to focus the four infrared lamps on the test piece 21. And then, starting the laser heating module 6, adjusting the laser light path in a visible light mode, and adjusting the focal length of the laser in a low-power state to focus the laser on the test piece 21. And then controlling the infrared module to heat the surface of the sample to 800 ℃ constantly. And then starting the laser module, gradually increasing the output power, and utilizing the infrared temperature measurement and the colorimeter feedback to enable the temperature of the sample area to reach the ultra-high temperature state above 2000 ℃.
The rest of the present example and the experimental procedure were the same as in example 1.
Example 4 Infrared and laser thermal destruction experiments
This example is the same as the experimental apparatus of example 1 except that the test piece 21 is subjected to laser drilling during loading in the experimental step.
And starting an infrared module to heat the plate-shaped sample to 500 ℃ for fatigue testing. After testing for 4 hours, without unloading, the laser module was turned on, the laser generator 27 was controlled to generate 800W of continuous laser, a through hole having a diameter of 2mm was instantaneously formed in the middle of the plate-shaped sample, and then the laser module was turned off. The fatigue test at 500 ℃ is continued and the force-displacement data of the whole process are recorded simultaneously.
The rest of the present example and the experimental procedure were the same as in example 1.
Example 5 Infrared and laser thermal shock test
This embodiment is different from embodiment 1 in that the test piece 21 is impacted by laser pulses during the loading process.
And starting an infrared module to heat the rod-shaped sample to 750 ℃ for fatigue testing. After 4 hours of testing, the laser module is started under the condition of no unloading, the laser generator 27 is controlled to generate 400W and 2Hz pulse laser, and the pulse laser continuously acts for 30 s. The laser module was then turned off, the fatigue test continued at 750 ℃ and the force-displacement data for the entire process were recorded simultaneously.
The rest of the present example and the experimental procedure were the same as in example 1.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments, or equivalents may be substituted for some or all of the features thereof, without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a non-contact thermal shock high temperature mechanics testing arrangement, includes base (11) and is fixed in mechanics experiment module (1) on base (11), its characterized in that: the mechanical experiment module (1) and the base (11) form a cavity, a middle cross beam (2) is transversely arranged in the cavity, and two ends of the middle cross beam (2) are fixedly connected with the mechanical experiment module; two symmetrical guide rails (7) are longitudinally arranged in the cavity, one end of each guide rail (7) is fixedly connected with the mechanical experiment module, and the other end of each guide rail (7) is fixedly connected with the base (11);
an outer cavity upper clamp (3) is fixedly arranged below the middle cross beam (2), and an outer cavity lower clamp (10) is correspondingly arranged on the upper surface of the base (11);
the spherical cavity (15) is connected with the two guide rails (7) in a sliding manner through a cavity support (16), and two ends of the cavity support (16) are connected with the guide rails (7) in a sliding manner and slide up and down along the guide rails (7);
the spherical cavity (15) is a hollow spherical cavity and is provided with a plurality of flanges penetrating through the outer wall of the spherical cavity (15); the upper vacuum corrugated pipe (13) and the lower vacuum corrugated pipe (18) are symmetrically arranged on the spherical cavity (15) and are hermetically connected with the spherical cavity (15) through flanges; a penetrating upper pull rod (12) is arranged in the upper vacuum corrugated pipe (13), one end of the upper pull rod (12) is matched with the outer upper clamp (3) of the cavity, and the other end of the upper pull rod is connected with an inner upper clamp (19); a lower pull rod (9) penetrating through the lower vacuum corrugated pipe (18) is arranged in the lower vacuum corrugated pipe, one end of the lower pull rod (9) is matched with the outer cavity lower clamp (10), and the other end of the lower pull rod is connected with the inner cavity lower clamp (22); the spherical cavity (15) is respectively connected with the vacuum gauge (4), the infrared heating module (5), the laser heating module (6), the infrared temperature measuring module (23), the dynamic testing module (24), the vacuum air exhaust module (8), the air inlet module (17) and the sample inlet door (14) through flanges penetrating through the surface of the spherical cavity (15);
spherical cavity (15) inside is equipped with assorted intracavity anchor clamps (19) and intracavity anchor clamps (22) down, and test piece (21) are located between intracavity anchor clamps (19) and the intracavity anchor clamps down, and spherical cavity (15) inner wall still is fixed and is equipped with extensometer (20).
2. The non-contact thermal shock high-temperature mechanical testing device according to claim 1, wherein sixteen flanges penetrating through the outer wall of the spherical cavity (15) are arranged on the spherical cavity (15); the four middle flanges are symmetrically arranged on the spherical cavity (15), the spherical cavity (15) is divided into an upper part and a lower part which are symmetrical by the four middle flanges, the top end of the upper part of the spherical cavity (15) is provided with a top end flange, and the top end flange is hermetically connected with the upper vacuum corrugated pipe (13); the bottom end of the lower part of the spherical cavity (15) is provided with a bottom end flange which is hermetically connected with a lower vacuum corrugated pipe (18); four upper flanges are symmetrically arranged at the upper part of the spherical cavity (15); four lower flanges are symmetrically arranged at the lower part of the spherical cavity (15); the two side flanges are symmetrically arranged at the lower part of the spherical cavity (15) and are positioned at two sides of the lower vacuum corrugated pipe (18).
3. The non-contact thermal shock high temperature mechanical testing device according to claim 1, wherein the infrared heating module (5) comprises at least one infrared lamp.
4. The non-contact thermal shock high-temperature mechanical testing device according to claim 1, wherein the laser heating module (6) is composed of a carbon dioxide laser (27), a reflecting mirror (26) and an adjustable ZnSe focusing mirror (25), and the reflecting mirror (26) and the ZnSe focusing mirror (25) form an L-shaped light path.
5. The non-contact thermal shock high temperature mechanical testing device according to claim 1, wherein the air inlet module (17) comprises a solenoid valve and a proton flow meter which are connected in sequence.
6. The non-contact thermal shock high temperature mechanical testing device according to claim 1, wherein the sample injection door (14) is provided with an observation window.
7. The non-contact thermal shock high temperature mechanical testing device according to claim 2, wherein the middle flange is respectively connected with the laser heating module (6), the infrared temperature measuring module (23), the sample injection door (14) and the dynamic testing module (24).
8. The non-contact thermal shock high temperature mechanical testing device according to claim 2, wherein the side flanges are respectively connected with the air inlet module (17) and the vacuum pumping module (8); the model of the middle flange is CF100, the models of the top end flange and the bottom end flange are CF32, the models of the upper flange and the lower flange are CF63, and the model of the side flange is CF 15.
9. The non-contact thermal shock high temperature mechanical testing device according to any one of claims 1 to 8, wherein the mechanical experiment module (1), the middle cross beam (2), the guide rail (7), the base (11) and the cavity bracket (16) are made of steel or stainless steel; the spherical cavity (15), the vacuum corrugated pipe (13) and the flange are made of stainless steel.
10. The non-contact thermal shock high temperature mechanical testing device according to any one of claims 1 to 8, wherein the material of the upper fixture (19) in the cavity and the material of the lower fixture (22) in the cavity are one of tungsten steel or high temperature alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836827A (en) * | 2019-11-06 | 2020-02-25 | 南京航空航天大学 | Non-contact thermal shock high-temperature mechanical testing device |
| RU2794108C1 (en) * | 2022-10-07 | 2023-04-11 | Федеральное Автономное Учреждение "Центральный институт авиационного моторостроения имени П.И. Баранова" | Method for determining tensile strength of ceramic and composite materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836827A (en) * | 2019-11-06 | 2020-02-25 | 南京航空航天大学 | Non-contact thermal shock high-temperature mechanical testing device |
| RU2794108C1 (en) * | 2022-10-07 | 2023-04-11 | Федеральное Автономное Учреждение "Центральный институт авиационного моторостроения имени П.И. Баранова" | Method for determining tensile strength of ceramic and composite materials |
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