CN109490060A - Strength testing device - Google Patents
Strength testing device Download PDFInfo
- Publication number
- CN109490060A CN109490060A CN201811298934.2A CN201811298934A CN109490060A CN 109490060 A CN109490060 A CN 109490060A CN 201811298934 A CN201811298934 A CN 201811298934A CN 109490060 A CN109490060 A CN 109490060A
- Authority
- CN
- China
- Prior art keywords
- testpieces
- testing device
- strength testing
- mounting surface
- movable plate
- 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.)
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- Physics & Mathematics (AREA)
- General 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)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The disclosure provides a kind of strength testing device.The strength testing device is the tubular structure of both ends open for testing a testpieces, the testpieces.The strength testing device includes mounting base, movable plate, supporting table, support rod and loading mechanism.The mounting base is equipped with mounting surface.The movable plate and the mounting surface face are arranged.The supporting table is connected to the mounting surface, and between the mounting surface and the movable plate.The support rod is detachably secured to the supporting table, and the testpieces is rotationally sheathed on the support rod and can be detachably connected with the movable plate.The loading mechanism is used to drive the movable plate mobile to the direction far from or close to the mounting surface.The strength testing device of the disclosure can make the disassembly of testpieces and fixation more convenient, while can also adjust position of the position for being connected to movable plate of testpieces in support rod circumferential direction.
Description
Technical field
This disclosure relates to test device technical field more particularly to a kind of strength testing device.
Background technique
Undercarriage is to take off, land, sliding race, ground moving and park necessary support system, the system packet
Rocker arm, load pillar and damper etc. are included.Wherein, which is installed in damper outer cylinder.When damper outer cylinder is strong
When spending lower, effective protection cannot be formed to damper, to influence the performance of undercarriage, and then jeopardize the safety of aircraft.
In order to exclude above-mentioned harm, need to carry out strength test to the damper outer cylinder before using.
During existing strength test, need to be held on the both ends of damper outer cylinder using two fixtures, and pass through
Loading mechanism applies load to damper outer cylinder.However, two fixtures should be needed to pass through spiral shell with damper outer cylinder respectively in the process
It tethers and connects, the disassembly and fixation to damper outer cylinder bring inconvenience.
It should be noted that information is only used for reinforcing the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The disclosure is designed to provide a kind of strength testing device, and the disassembly of testpieces and fixation can be made more square
Just, while position of the position for being connected to movable plate of testpieces in support rod circumferential direction can also be adjusted.
According to one aspect of the disclosure, a kind of strength testing device is provided.The strength testing device is for testing one
Testpieces, the testpieces are the tubular structure of both ends open.The strength testing device includes mounting base, movable plate, support
Platform, support rod and loading mechanism.The mounting base is equipped with mounting surface.The movable plate and the mounting surface face are arranged.Institute
It states supporting table and is connected to the mounting surface, and between the mounting surface and the movable plate.The support rod is removably
It is fixed on the supporting table, the testpieces is rotationally sheathed on the support rod and can detachably connect with the movable plate
It connects.The loading mechanism is used to drive the movable plate mobile to the direction far from or close to the mounting surface.
In a kind of exemplary embodiment of the disclosure, the strength testing device further includes bearing.The bearing is arranged
In the support rod, the outer peripheral surface of the inner ring of the bearing and the support rod cooperates, and the outer ring of the bearing can be with the examination
Test the inner peripheral surface cooperation of part.
In a kind of exemplary embodiment of the disclosure, the bearing is oscillating bearing.
In a kind of exemplary embodiment of the disclosure, the supporting table is slidably connected to the mounting surface.
In a kind of exemplary embodiment of the disclosure, the strength testing device further includes sliding slot and sliding block.The cunning
Slot is set to the mounting surface.The sliding block is set to the supporting table, and is slideably defined in the sliding slot.
In a kind of exemplary embodiment of the disclosure, the supporting table is set there are two support portion, a support portion energy
Hinged with one end of the testpieces, another support portion can be hinged with the other end of the testpieces.
In a kind of exemplary embodiment of the disclosure, the strength testing device further includes guide post.The guide post
One end be fixed on the mounting surface, the other end is slidably disposed through the movable plate.
In a kind of exemplary embodiment of the disclosure, the strength testing device further includes strain-Sensing device.It is described
Strain-Sensing device can be detachably arranged at the testpieces surface, for detecting the strain value of the testpieces.
In a kind of exemplary embodiment of the disclosure, the strain-Sensing device is foil gauge.
In a kind of exemplary embodiment of the disclosure, the movable plate is equipped with first connecting portion, and the testpieces is equipped with
Second connecting portion, the first connecting portion can be connect with the second connecting portion by pin shaft.
The beneficial effect of the disclosure compared with prior art is:
On the one hand, strength test is carried out by making testpieces be sheathed on support rod, testpieces consolidated with can be convenient
Fixed and disassembly；On the other hand, since testpieces is rotationally sheathed on support rod, shifting is connected to so as to adjust testpieces
Position of the position of movable plate in support rod circumferential direction.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
It is described in detail its exemplary embodiment by referring to accompanying drawing, the above and other feature and advantage of the disclosure will become
It obtains more obvious.It should be evident that the accompanying drawings in the following description is only some embodiments of the present disclosure, it is common for this field
For technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the front view of the strength testing device of disclosure embodiment；
Fig. 2 is the side view of the strength testing device of disclosure embodiment；
Fig. 3 is the front view of the supporting table of disclosure embodiment, the assembling structure of support rod and testpieces；
Fig. 4 is the side view of the supporting table of disclosure embodiment, the assembling structure of support rod and testpieces；
Fig. 5 is the sliding block of disclosure embodiment and the decomposition diagram of sliding slot；
Fig. 6 is the support rod of disclosure embodiment and the assembling schematic diagram of bearing.
In figure: 1, mounting base；2, mounting surface；3, movable plate；4, supporting table；5, support rod；6, testpieces；7, support portion；
8, first connecting portion；9, second connecting portion；10, guide post；11, sliding slot；12, sliding block；13, bearing.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to example set forth herein；On the contrary, these embodiments are provided so that the disclosure will comprehensively and
Completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, structure or characteristic
It can be incorporated in any suitable manner in one or more embodiments.In the following description, it provides many specific thin
Section fully understands embodiment of the present disclosure to provide.It will be appreciated, however, by one skilled in the art that this can be practiced
Disclosed technical solution, or can be using other methods, material, dress without one or more in the specific detail
It sets.In other cases, known solution is not shown in detail or describes to avoid fuzzy all aspects of this disclosure.Phase in figure
Same appended drawing reference indicates same or similar structure, thus the detailed description that will omit them.
Term "one", " one ", "the" and " described " to indicate there are one or more elements/component part/etc.；With
Language " comprising ", " having " and " being equipped with " are to indicate the open meaning being included and refer in addition to that lists wants
Element/component part/also may be present except waiting other element/component part/etc..
Disclosure embodiment provides a kind of strength testing device.The strength testing device, should for testing a testpieces
Testpieces is the tubular structure of both ends open.As shown in Figures 1 to 4, which may include mounting base 1, movable plate
3, supporting table 4, support rod 5 and loading mechanism.Wherein:
Mounting base 1 can be equipped with mounting surface 2.Movable plate 3 and mounting surface 2 can face settings.Supporting table 4 may connect to mounting surface
2, and between mounting surface 2 and movable plate 3.Support rod 5 is detachably secured to supporting table 4, and testpieces 6 is rotationally arranged
It can be detachably connected in support rod 5 and with movable plate 3.Loading mechanism can be used for driving movable plate 3 to separate or close mounting surface 2
Direction it is mobile.
Testpieces 6 during the test, is sheathed on support rod 5 first by the strength testing device of disclosure embodiment,
And it connect movable plate 3 with testpieces 6；Then start driving device, keep movable plate 3 mobile to the direction far from mounting surface 2, from
And load can be applied to testpieces 6, and then can be with the intensity of testing experiment part 6.Compared with prior art, on the one hand, pass through branch
Testpieces 6 is fixed in strut 5, keeps the disassembly of testpieces 6 and fixation more convenient；On the other hand, since testpieces 6 can turn
It is sheathed on support rod 5, dynamicly so as to adjust position of the position for being connected to movable plate 3 of testpieces 6 in 5 circumferential direction of support rod
It sets.
Each component of the intensity detecting device of disclosure embodiment is described in detail below:
As depicted in figs. 1 and 2, mounting base 1 can provide structural support for strength testing device.Wherein, mounting base 1 can be with
Including mounting plate.The mounting plate has opposite first surface and second surface.The first surface can be mounting surface 2.Installation
Seat 1 can also include moving parts, for moving the position of mounting base 1.For example, the moving parts is idler wheel, which can be set
In above-mentioned mounting plate backwards to the surface of mounting surface 2.In disclosure other embodiment, which can also include other
Component.In addition, the mounting base 1 can have biggish weight, to improve the stability of mounting base 1 during the test.Certainly,
It can also be by the way that mounting base 1 be anchored to ground to improve its stability.
As shown in Figures 1 to 4, movable plate 3 can be arranged with 2 face of mounting surface, and can be connected to testpieces 6.In load machine
Under the action of structure, movable plate 3 can be to mobile far from mounting surface 2 or close to the direction of mounting surface 2, so as to testpieces 6
Apply load.Wherein, movable plate 3 can be detachably connected with testpieces 6.Specifically, movable plate 3 is equipped with first connecting portion 8, examination
Part 6 is tested equipped with second connecting portion 9, first connecting portion 8 can be connect with second connecting portion 9 by pin shaft.More specifically, the first connection
Portion 8 includes the square with first through hole, and second connecting portion 9 includes the first protrusive board and for being formed in the outer peripheral surface of testpieces 6
Two protrusive boards.First protrusive board and the second protrusive board are oppositely arranged, and parallel with the axis of support rod 5.First protrusive board and second convex
The space that can accommodate above-mentioned square, and the position corresponding to square through-hole of the first protrusive board and the second protrusive board are formd between plate
It is provided with the second through-hole.The first through hole and two the second through-holes cooperate to receive above-mentioned pin shaft.Certainly, the first connection
Portion 8 can also be detachably connected by other ways such as clampings with second connecting portion 9.In addition, movable plate 3 can be by carbon fiber system
It is standby to form, so that movable plate 3 can have higher intensity in the case where lighter weight, but not limited to this, it can also be by closing
The other materials such as golden aluminium, titanium alloy are prepared.Area of the movable plate 3 close to the surface of mounting surface 2 can be consistent with mounting surface 2,
It is of course also possible to inconsistent.In disclosure other embodiment, it can also be replaced with other moveable components such as mobile bar
Movable plate 3, as long as load can be applied to testpieces 6.
As shown in Figures 1 to 5, supporting table 4 can be between mounting surface 2 and movable plate 3, and can connect with mounting surface 2.
Wherein, which has bottom surface, which is slidably connected to mounting surface 2, so as to be conveniently adjusted supporting table 4
Position on mounting surface 2.For example, mounting surface 2 is equipped with sliding slot 11, the bottom surface of supporting table 4 is equipped with sliding block 12, which can slide
It is defined in the sliding slot 11 dynamicly.Wherein, sliding slot 11 can T-shaped sliding slot 11, which can be to be adapted with T-type sliding slot 11
T-type sliding block 12, but not limited to this, the sliding slot 11 and sliding block 12 can also be other shapes, as long as sliding block 12 can be made to be sticked in
Sliding slot 11.The quantity of the sliding slot 11 can be multiple, and any sliding slot 11 is arranged in parallel with remaining sliding slot 11.The sliding block
12 quantity can be identical as the quantity of sliding slot 11, and multiple sliding blocks 12 can be defined in multiple sliding slots 11 correspondingly.When
So, above-mentioned sliding block 12 can also be set to mounting surface 2, above-mentioned sliding slot 11 is set to the bottom surface of supporting table 4.In addition, the sliding slot 11
It can be formed by way of broaching, but not limited to this, it can also be formed by way of turning or grinding.In the other realities of the disclosure
It applies in mode, which can also weld or be bolted in mounting surface 2, and this will not be detailed here.
As shown in Figure 3 and Figure 4, above-mentioned supporting table 4 can be connect with support rod 5.Specifically, the supporting table 4 is backwards
The side of bottom surface is set there are two table top, and each table top is designed with a support portion 7.Wherein, a support portion 7 can be with testpieces 6
One end be detachably connected, another support portion 7 can be detachably connected with the other end of testpieces 6.Certainly, in a support portion 7
In the case where being detachably connected with one end of testpieces 6, another support portion 7 can be with the non-dismountable company of the other end of testpieces 6
It connects.Wherein, it can be hinged that this, which is detachably connected, it is, of course, also possible to for clamping, threaded connection etc..The non-dismountable connection can
Think welding or bonding etc..In addition, two support portions 7 can be welded or be bolted in the table top of supporting table 4, but it is not limited to
This can also be connected to the table top of supporting table 4 by other ways such as bondings, and certainly, two support portions 7 can be with supporting table
4 table top is integrally formed, and is not integrally formed mode to it herein and is made particular determination.In addition, two table tops are equipped with elevating mechanism,
To adjust the distance between two table tops and mounting surface 2, and then the distance between two support portions 7 and mounting surface 2 can be adjusted.
In disclosure other embodiment, the quantity of support portion 7 included by the supporting table 4 can also be three, four or five, but
It is not limited, can also be more, and be all connected to support rod 5.
As shown in Fig. 3, Fig. 4 and Fig. 6,5 availability test part 6 of support rod is arranged, for providing structural support for testpieces 6.
The length of the support rod 5 should be greater than the length of testpieces 6, and cross section can be circle etc..The material of the support rod 5 can be
Cast iron, so as to good rigidity, to weaken the deformation of support rod 5 during the test.Certainly, the material of the support rod 5
It can also be other materials with good stiffness such as cast steel.In addition, testpieces 6 is rotationally sheathed on support rod 5.It is specific and
Speech, support rod 5 are arranged with bearing 13.The inner ring of the bearing 13 can cooperate with the outer peripheral surface of support rod 5, the outer ring of the bearing 13
It can cooperate with testpieces 6, so as to rotate testpieces 6 around support rod 5.In the loading direction phase that testpieces 6 is subject to
When having deviation for the moving direction of movable plate 3, set bearing 13 can be such that testpieces 6 rotates automatically, to eliminate deviation.
Wherein, which can be oscillating bearing.In disclosure other embodiment, 5 outer peripheral surface of support rod can also be reduced
Roughness, and then the frictional force between support rod 5 and testpieces 6 is reduced, so that testpieces 6 be enable easily to rotate.
Loading mechanism can be connect with movable plate, can be used for that movable plate is driven to move to the direction far from or close to mounting surface
It is dynamic.Wherein, which may include motor or cylinder, and but not limited to this, can also include speed reducer, ball screw assembly,
Deng.
As depicted in figs. 1 and 2, the strength testing device of disclosure embodiment further includes guide post 10, can guide shifting
Movable plate 3 is mobile to the direction far from or close to mounting surface 2.Mounting surface 2 is fixed in one end of the guide post 10, and the other end is slidably
Ground passes through movable plate 3.Wherein, one end of guide post 10 is solderable is connected to stationary plane, it is of course also possible to be bolted etc. other
Mode is fixed on mounting surface 2.The movable plate 3 is equipped with the through-hole matched with guide post 10, so that movable plate 3 can be along guiding
Column 10 is mobile.The section of the guide post 10 can be zhou duicheng tuxing.The zhou duicheng tuxing can be round or rectangle, but unlimited
It can also be regular hexagon etc. in this.In addition, the guide post 10 can be prepared by the higher material of hardness.The hardness compared with
High material can be chromium nickel stainless steel, high molybdenum stainless steel, super-low carbon stainless steel etc., will not enumerate herein.In addition, this is led
It can be two, three or four to the quantity of column 10, but not limited to this, can also be more, specifically can be according to movable plate 3
Size depending on, the size of movable plate 3 is bigger, and the quantity of guide post 10 is more.
The intensity detecting device of disclosure embodiment can also include deformation detecting device.The deformation detecting device can
It is detachably arranged at testpieces surface, for detecting the strain value of the testpieces.Specifically, the strain-Sensing device can be
Foil gauge.The repeatable surface for being pasted on testpieces of the foil gauge.
Those skilled in the art will readily occur to other embodiments of the disclosure after considering specification and practice.This
Application is intended to cover any variations, uses, or adaptations of the disclosure, these variations, uses, or adaptations are abided by
Follow the general principle of the disclosure and including common knowledge or conventional techniques in the art.Description and embodiments
It is considered only as illustratively, the true scope and spirit of the disclosure are pointed out by the attached claims.
Claims (10)
1. a kind of strength testing device, for testing a testpieces, the testpieces is the tubular structure of both ends open, feature
It is, the strength testing device includes:
Mounting base is equipped with mounting surface；
Movable plate is arranged with the mounting surface face；
Supporting table is connected to the mounting surface, and between the mounting surface and the movable plate；
Support rod, is detachably secured to the supporting table, and the testpieces is rotationally sheathed on the support rod and can be with
The movable plate is detachably connected；
Loading mechanism, for driving the movable plate mobile to the direction far from or close to the mounting surface.
2. strength testing device according to claim 1, which is characterized in that the strength testing device further include:
Bearing is sheathed on the support rod, and the inner ring of the bearing and the outer peripheral surface of the support rod cooperate, outside the bearing
Circle can cooperate with the inner peripheral surface of the testpieces.
3. strength testing device according to claim 2, which is characterized in that the bearing is oscillating bearing.
4. strength testing device according to claim 1, which is characterized in that the supporting table is slidably connected to described
Mounting surface.
5. strength testing device according to claim 4, which is characterized in that the strength testing device further include:
Sliding slot is set to the mounting surface；
Sliding block is set to the supporting table, and is slideably defined in the sliding slot.
6. strength testing device according to claim 1, which is characterized in that the supporting table is set there are two support portion, and one
The support portion can be hinged with one end of the testpieces, and another support portion can be hinged with the other end of the testpieces.
7. strength testing device according to claim 1, which is characterized in that the strength testing device further include:
The mounting surface is fixed in guide post, one end, and the other end is slidably disposed through the movable plate.
8. strength testing device according to claim 1, which is characterized in that the strength testing device further include:
Strain-Sensing device can be detachably arranged at the testpieces surface, for detecting the strain value of the testpieces.
9. strength testing device according to claim 8, which is characterized in that the strain-Sensing device is foil gauge.
10. strength testing device according to claim 1, which is characterized in that the movable plate is equipped with first connecting portion, institute
Testpieces is stated equipped with second connecting portion, the first connecting portion can be connect with the second connecting portion by pin shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811298934.2A CN109490060A (en) | 2018-11-02 | 2018-11-02 | Strength testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811298934.2A CN109490060A (en) | 2018-11-02 | 2018-11-02 | Strength testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109490060A true CN109490060A (en) | 2019-03-19 |
Family
ID=65692429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811298934.2A Pending CN109490060A (en) | 2018-11-02 | 2018-11-02 | Strength testing device |
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| Country | Link |
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| CN (1) | CN109490060A (en) |
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| CN205844098U (en) * | 2016-07-19 | 2016-12-28 | 玉溪市旭日塑料有限责任公司 | Paper tube resistance to compression detector |
| CN206074359U (en) * | 2016-10-08 | 2017-04-05 | 大连理工大学 | A kind of ocean engineering compliance umbilical stretch bending combined experimental device |
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| CN207163811U (en) * | 2017-06-15 | 2018-03-30 | 山东铁正工程试验检测中心有限公司 | Glass fiber reinforcement muscle stretching clamp |
| CN207248616U (en) * | 2017-10-21 | 2018-04-17 | 深圳市正强混凝土有限公司 | A kind of concrete pressure testing machine with protective device |
| CN108287115A (en) * | 2018-02-13 | 2018-07-17 | 大连理工大学 | The test method and device that non-adherent umbilical armor prestressing force influences bending property |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001141618A (en) * | 1999-11-11 | 2001-05-25 | Nkk Corp | Force application tester for steel pole having beam filled with concrete |
| KR20080044587A (en) * | 2006-11-17 | 2008-05-21 | (주)플로엘텍 | O-ring tester |
| US20080295606A1 (en) * | 2007-06-04 | 2008-12-04 | Jason Chinavare | Bend Tool |
| CN203422284U (en) * | 2013-08-23 | 2014-02-05 | 天津钢管集团股份有限公司 | Autoclave device for simulating external pressure bearing and bending of petroleum tubular product under shaft |
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| CN205844098U (en) * | 2016-07-19 | 2016-12-28 | 玉溪市旭日塑料有限责任公司 | Paper tube resistance to compression detector |
| CN206074359U (en) * | 2016-10-08 | 2017-04-05 | 大连理工大学 | A kind of ocean engineering compliance umbilical stretch bending combined experimental device |
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| CN207163811U (en) * | 2017-06-15 | 2018-03-30 | 山东铁正工程试验检测中心有限公司 | Glass fiber reinforcement muscle stretching clamp |
| CN207248616U (en) * | 2017-10-21 | 2018-04-17 | 深圳市正强混凝土有限公司 | A kind of concrete pressure testing machine with protective device |
| CN108287115A (en) * | 2018-02-13 | 2018-07-17 | 大连理工大学 | The test method and device that non-adherent umbilical armor prestressing force influences bending property |
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