CN109668777B - Test auxiliary device for detecting concrete splitting tensile strength - Google Patents
Test auxiliary device for detecting concrete splitting tensile strength Download PDFInfo
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- CN109668777B CN109668777B CN201910154447.7A CN201910154447A CN109668777B CN 109668777 B CN109668777 B CN 109668777B CN 201910154447 A CN201910154447 A CN 201910154447A CN 109668777 B CN109668777 B CN 109668777B
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- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000000945 filler Substances 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003776 cleavage reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
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- 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
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a test auxiliary device for detecting the concrete splitting tensile strength, which comprises a base, wherein the upper end of the base is fixedly connected with a connecting block through a telescopic rod, the side wall of the connecting block is fixedly connected with a pressing plate, the upper end surface of the base is provided with an opening, the lower end surface of the base is fixedly connected with a first L-shaped rod, the upper end of the base, which is positioned at the opening, is provided with a supporting plate, the side wall of the first L-shaped rod is fixedly connected with a pushing device for pushing the supporting plate to move, the lower end of the base is fixedly connected with a second L-shaped rod, a scale is arranged on the second L-shaped rod in a penetrating manner, and the upper end of the scale is fixedly connected. The concrete test piece is clamped by the pressing plate and the abutting block with the arc surfaces, and no central line needs to be drawn on the bottom surface and the bottom surface of the concrete test piece, so that the test error is reduced, the test efficiency is improved, the concrete test device can be widely applied to the test of the splitting tensile property of common concrete, and the practicability is high.
Description
Technical Field
The invention relates to the technical field of detecting tensile strength, in particular to a test auxiliary device for detecting the splitting tensile strength of concrete.
Background
The concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening. Concrete is mainly divided into two stages and states: plastic state before setting and hardening, namely fresh concrete or concrete mixture; a hard state after hardening, i.e. hardened concrete or concrete;
the tensile property of concrete is one of basic mechanical properties, the test for directly measuring the tensile property of the concrete axle center has certain difficulty at present, and the test data has larger discreteness, so the split-draw test is generally carried out on a concrete cube test block.
The existing split-draw test generally adopts a filler strip to carry out a cube test block split-draw test. During testing, parallel lines are firstly scribed on the top surface and the bottom surface of a formed concrete test block to determine the position of a cleavage plane, manual scribing on the test block is troublesome and has the influence of human factors, scribing precision is influenced, and a pad strip needs to be manually placed to be aligned with the scribed lines in the subsequent operation process, so that the position of the cleavage plane cannot be ensured at the central position of the test block, and the accuracy of the test is influenced.
In addition, when cutting the concrete test block among the prior art, place two filler strips on a smooth backing plate, the concrete test block presss from both sides between two filler strips, when cutting the concrete block from the centre, the skew of filler strip can appear, and difficult operation has seriously influenced splitting tensile strength value's reliability, has reduced work efficiency and has wasted the time. Therefore, the lack of a special splitting tensile test auxiliary device not only causes great difficulty in test implementation, but also has great error of test results.
Disclosure of Invention
The invention aims to solve the defects in the prior art, provides a test auxiliary device for detecting the splitting tensile strength of concrete, the concrete sample is clamped by the pressing plate and the abutting block with the arc surfaces, no central line needs to be drawn on the bottom surface and the bottom surface of the concrete sample, thereby reducing test error, improving test efficiency, being widely applicable to the common concrete splitting tensile property test, having stronger practicability, the arc top of the abutting block is aligned with the center line of the bottom surface of the concrete sample and the arc top of the pressing plate is aligned with the center line of the top surface of the concrete sample through the matching of the clamping device, so that the abutting block forms a support at the center line position of the bottom surface of the concrete sample, the pressing plate presses downwards at the center line of the top surface of the concrete test piece, so that the stress of the concrete test piece is ensured to be at the center of the concrete test piece, and the test accuracy is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a detect concrete splitting tensile strength's experimental auxiliary device, includes the base, the upper end of base is passed through telescopic link fixedly connected with connecting block, the lateral wall fixedly connected with clamp plate of connecting block, the opening has been seted up to the up end of base, the first L shape pole of lower terminal surface fixedly connected with of base, the upper end of base is located the opening part and is equipped with the offset, the lateral wall fixedly connected with of first L shape pole is used for promoting the thrust unit who removes the offset, the lower extreme fixedly connected with second L shape pole of base, it is equipped with the scale to run through on the second L shape pole, the upper end fixed connection of scale is at the lower extreme of offset, angle adjustment device is installed to the upper end of base, the last clamping device that installs of angle adjustment device.
Preferably, thrust unit includes the fixed block of fixed connection on first L shape pole lateral wall, set up the device chamber in the fixed block, the inner wall in device chamber rotates and is connected with the worm, the one end fixedly connected with runner that the worm is located the device chamber outside, the inner wall in device chamber rotates and is connected with the worm wheel with worm meshing, the circle chamber with device chamber intercommunication is seted up to the upper end of fixed block, the circle intracavity internal rotation is connected with the drum with the coaxial fixed connection of worm wheel, drum female connection has first threaded rod, the upper end of first threaded rod and the lower extreme welding of support piece.
Preferably, the angle adjusting device includes two sector plates of fixed connection in the base upper end, two it is connected with the fixed axle to rotate between the sector plate, the lateral wall fixedly connected with connecting rod of fixed axle, the cavity spout has been seted up to the lateral wall of connecting rod, sliding connection has the gag lever post in the cavity spout, the lateral wall of sector plate is seted up a plurality ofly along its circumference equidistant spacing groove corresponding with the gag lever post position, the lateral wall fixedly connected with of gag lever post rather than vertically pull rod, the pull rod passes through spring elastic connection on the inner wall of cavity spout, the lateral wall fixedly connected with of pull rod rather than vertically holding rod.
Preferably, clamping device is including rotating the diaphragm of connection on the connecting rod, the lateral wall fixedly connected with fixed plate of diaphragm, the spout has been seted up on the diaphragm, the lateral wall of diaphragm runs through to be equipped with and rotates the second threaded rod of connection on the spout inner wall, threaded connection has the slider on the second threaded rod, fixedly connected with and the parallel fly leaf of fixed plate on the slider.
Preferably, the inner wall of the round cavity is provided with a guide groove, a guide block is connected in the guide groove in a sliding mode, and the guide block is fixedly connected to the side wall of the first threaded rod.
Preferably, the telescopic link includes the sleeve of fixed connection on the base, sliding connection has the bracing piece on the sleeve, the upper end fixed connection of bracing piece is at the lower extreme of connecting block, be equipped with the spacer pin on the sleeve, the slot corresponding with the spacer pin position has been seted up along vertical direction to the upper end of bracing piece.
Preferably, the lower extreme fixedly connected with supporting leg of base, the lower extreme veneer of supporting leg has the rubber pad, the lower extreme of rubber pad is equipped with multichannel antiskid groove, the multichannel antiskid groove equipartition is in the lower terminal surface of rubber pad.
Preferably, the lower end surface of the pressing plate and the upper end surface of the abutting plate are both cambered surfaces.
The invention has the following beneficial effects:
1. the abutting block and the pressing plate are provided with arc surfaces, when a concrete test piece is clamped between the abutting block and the pressing plate, the arc top of the abutting block is contacted with the concrete floor, the arc top of the pressing plate is contacted with the top surface of the concrete test piece, and due to the arc surfaces, when the arc surfaces are contacted with a plane, the joint positions of the arc surfaces and the plane are in line contact;
2. the arc top of the abutting block is aligned with the center line of the bottom surface of the concrete test piece and the arc top of the pressing plate is aligned with the center line of the top surface of the concrete test piece through the matching of the clamping device, so that the abutting block forms a support at the center line position of the bottom surface of the concrete test piece, and the pressing plate forms a downward pressing at the center line position of the top surface of the concrete test piece, thereby ensuring the stress of the concrete test piece at the center position thereof and improving the test accuracy;
3. the concrete test piece is clamped by the pressing plate and the abutting block with the arc surfaces, and no central line needs to be drawn on the bottom surface and the bottom surface of the concrete test piece, so that the test error is reduced, the test efficiency is improved, the test device can be widely applied to the test of the splitting tensile property of common concrete, and the practicability is high;
4. the assembly capable of clamping the side face of the concrete test piece is arranged on the base, so that the stability and balance of the concrete test piece under pressure are guaranteed, and the accuracy of a test result can be ensured.
Drawings
FIG. 1 is a schematic structural diagram of a test auxiliary device for detecting concrete splitting tensile strength according to the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is an enlarged view of the structure at B in FIG. 1;
FIG. 4 is a schematic structural diagram of a telescopic rod of the auxiliary testing device for detecting the tensile strength of concrete splitting according to the present invention;
fig. 5 is a schematic structural diagram of a pushing device of a test auxiliary device for detecting the tensile strength of concrete splitting according to the present invention.
In the figure: the device comprises a base 1, a sleeve 2, a limiting pin 3, a slot 4, a supporting rod 5, a connecting block 6, a pressing plate 7, a fixing plate 8, a transverse plate 9, a second threaded rod 10, a sliding chute 11, a sliding block 12, a movable plate 13, a sector plate 14, a supporting plate 15, a second L-shaped rod 16, a scale 17, an opening 18, a supporting leg 19, a first threaded rod 20, a fixing block 21, a cylinder 22, a worm 23, a worm wheel 24, a rotating wheel 25, a first L-shaped rod 26, a guide block 27, a guide groove 28, a connecting rod 29, a spring 30, a limiting groove 31, a pull rod 32, a fixed shaft 33, a limiting rod 34 and a hollow sliding chute.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-5, an experimental auxiliary device for detecting concrete splitting tensile strength, including base 1, base 1's lower extreme fixedly connected with supporting leg 19, supporting leg 19's lower extreme veneer has the rubber pad, the lower extreme of rubber pad is equipped with multichannel antiskid groove, multichannel antiskid groove equipartition is at the lower terminal surface of rubber pad, telescopic link fixedly connected with connecting block 6 is passed through to base 1's upper end, the telescopic link includes fixed connection sleeve 2 on base 1, sliding connection has bracing piece 5 on sleeve 2, the upper end fixed connection of bracing piece 5 is at the lower extreme of connecting block 6, be equipped with spacer pin 3 on sleeve 2, slot 4 corresponding with 3 positions of spacer pin is seted up along vertical direction in the upper end of bracing piece 5.
The side wall of the connecting block 6 is fixedly connected with a pressing plate 7, the lower end face of the pressing plate 7 and the upper end face of the abutting plate 15 are both arc surfaces, the upper end face of the base 1 is provided with an opening 18, the lower end face of the base 1 is fixedly connected with a first L-shaped rod 26, the upper end of the base 1 is provided with the abutting plate 15 at the opening, the side wall of the first L-shaped rod 26 is fixedly connected with a pushing device for pushing the abutting plate 15 to move, the pushing device comprises a fixed block 21 fixedly connected to the side wall of the first L-shaped rod 26, a device cavity is arranged in the fixed block 21, the inner wall of the device cavity is rotatably connected with a worm 23, one end of the worm 23, which is positioned outside the device cavity, is fixedly connected with a rotating wheel 25, the inner wall of the device cavity is rotatably connected with a worm wheel 24 meshed with the worm 23, the upper end of the, the guide block 27 is fixedly connected to the side wall of the first threaded rod 20, a cylinder 22 which is coaxially and fixedly connected with the worm wheel 24 is rotatably connected in the circular cavity, the first threaded rod 20 is connected in the cylinder 22 in a threaded mode, and the upper end of the first threaded rod 20 is welded to the lower end of the abutting block 15.
Base 1's lower extreme fixedly connected with second L shape pole 16, run through on the second L shape pole 16 and be equipped with scale 17, the upper end fixed connection of scale 17 is at the lower extreme of resisting board 15, angle adjusting device is installed to base 1's upper end, angle adjusting device includes two sector disc 14 of fixed connection in base 1 upper end, it is connected with fixed axle 33 to rotate between two sector disc 14, the lateral wall fixedly connected with connecting rod 29 of fixed axle 33, cavity spout 35 has been seted up to the lateral wall of connecting rod 29, sliding connection has gag lever post 34 in the cavity spout 35, a plurality of spacing grooves 31 corresponding with gag lever post 34 position have been seted up along its circumference equidistant to the lateral wall of sector disc 14, the lateral wall fixedly connected with of gag lever post 34 rather than vertically pull rod 32, pull rod 32 passes through spring 30 elastic connection on the inner wall of cavity spout 35, pull rod 32's lateral wall fixedly connected with.
Install clamping device on the angle adjusting device, clamping device is including rotating diaphragm 9 of connection on connecting rod 29, and the lateral wall fixedly connected with fixed plate 8 of diaphragm 9 has seted up spout 11 on the diaphragm 9, and the lateral wall of diaphragm 9 runs through to be equipped with and rotates the second threaded rod 10 of connection on spout 11 inner wall, and threaded connection has slider 12 on the second threaded rod 10, fixedly connected with is parallel fly leaf 13 with fixed plate 8 on the slider 12.
In the invention, when the test auxiliary device is used, an operator places concrete to be detected between the pressing plate 7 and the abutting plate 15, if the distance between the pressing plate 7 and the abutting plate 15 can not place the concrete, the operator can adjust the distance between the pressing plate 7 and the abutting plate 15 through the telescopic rod, then the operator pulls the holding rod and enables the limiting rod 34 to be separated from the limiting groove 31, then the angle of the connecting rod 29 is adjusted, after the angle of the connecting rod 29 is adjusted, the operator clamps the side edge of the concrete through the clamping device, specifically, the operator rotates the second threaded rod 10, the second threaded rod 10 rotates to drive the sliding block 12 to move, the sliding block 12 moves to clamp the side edge of the concrete block through the movable plate 13, after the side edge is clamped, the operator rotates the rotating wheel 25 to drive the worm 23 to rotate, the worm 23 rotates to drive the worm wheel 24 to rotate, the worm wheel 24 rotates to drive the cylinder 22 to rotate, the cylinder 22 rotates to drive the first threaded rod 20 connected with the screw to move upwards, and the first threaded rod 20 moves upwards to enable the abutting plate 15 to clamp the concrete block.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention. .
Claims (6)
1. The test auxiliary device for detecting the tensile strength of the concrete splitting comprises a base (1) and is characterized in that the upper end of the base (1) is fixedly connected with a connecting block (6) through a telescopic rod, the side wall of the connecting block (6) is fixedly connected with a pressing plate (7), an opening (18) is formed in the upper end face of the base (1), a first L-shaped rod (26) is fixedly connected to the lower end face of the base (1), a resisting plate (15) is arranged at the opening at the upper end of the base (1), a pushing device used for pushing the resisting plate (15) to move is fixedly connected to the side wall of the first L-shaped rod (26), a second L-shaped rod (16) is fixedly connected to the lower end of the base (1), a scale (17) penetrates through the second L-shaped rod (16), and the upper end of the scale (17) is fixedly connected to the lower end of the resisting plate (15, an angle adjusting device is installed at the upper end of the base (1), and a clamping device is installed on the angle adjusting device;
the angle adjusting device comprises two fan-shaped discs (14) fixedly connected to the upper end of a base (1), a fixed shaft (33) is rotatably connected between the two fan-shaped discs (14), a connecting rod (29) is fixedly connected to the side wall of the fixed shaft (33), a hollow sliding chute (35) is formed in the side wall of the connecting rod (29), a limiting rod (34) is connected in the hollow sliding chute (35) in a sliding mode, a plurality of limiting grooves (31) corresponding to the limiting rod (34) in position are formed in the side wall of each fan-shaped disc (14) at equal intervals along the circumferential direction of the side wall of each fan-shaped disc, a pull rod (32) perpendicular to the side wall of each limiting rod (34) is fixedly connected to the side wall of each limiting rod (34), each pull rod (32) is elastically connected to the inner wall of each hollow sliding chute (;
clamping device connects diaphragm (9) on connecting rod (29) including rotating, the lateral wall fixedly connected with fixed plate (8) of diaphragm (9), spout (11) have been seted up on diaphragm (9), the lateral wall of diaphragm (9) runs through and is equipped with second threaded rod (10) of rotation connection on spout (11) inner wall, threaded connection has slider (12) on second threaded rod (10), fixedly connected with fly leaf (13) parallel with fixed plate (8) are gone up in slider (12).
2. The test auxiliary device for detecting the concrete splitting tensile strength according to claim 1, it is characterized in that the pushing device comprises a fixed block (21) fixedly connected with the side wall of the first L-shaped rod (26), a device cavity is arranged in the fixed block (21), the inner wall of the device cavity is rotationally connected with a worm (23), one end of the worm (23) positioned outside the cavity of the device is fixedly connected with a rotating wheel (25), the inner wall of the device cavity is rotationally connected with a worm wheel (24) meshed with the worm (23), the upper end of the fixed block (21) is provided with a round cavity communicated with the device cavity, the round cavity is rotationally connected with a cylinder (22) coaxially and fixedly connected with a worm wheel (24), the cylinder (22) is connected with a first threaded rod (20) in an internal thread mode, and the upper end of the first threaded rod (20) is welded with the lower end of the abutting block (15).
3. The auxiliary device for testing the tensile strength of the concrete split according to claim 2, wherein a guide groove (28) is formed in the inner wall of the round cavity, a guide block (27) is slidably connected in the guide groove (28), and the guide block (27) is fixedly connected to the side wall of the first threaded rod (20).
4. The test auxiliary device for detecting the tensile strength of the concrete splitting according to claim 1, wherein the telescopic rod comprises a sleeve (2) fixedly connected to the base (1), a supporting rod (5) is slidably connected to the sleeve (2), the upper end of the supporting rod (5) is fixedly connected to the lower end of the connecting block (6), a limiting pin (3) is arranged on the sleeve (2), and a slot (4) corresponding to the position of the limiting pin (3) is formed in the upper end of the supporting rod (5) in the vertical direction.
5. The auxiliary device for testing the tensile strength of the concrete split is characterized in that supporting legs (19) are fixedly connected to the lower end of the base (1), rubber pads are glued to the lower ends of the supporting legs (19), a plurality of anti-skid grooves are formed in the lower ends of the rubber pads, and the anti-skid grooves are evenly distributed on the lower end faces of the rubber pads.
6. The test auxiliary device for detecting the concrete splitting tensile strength according to claim 1, wherein the lower end surface of the pressing plate (7) and the upper end surface of the abutting plate (15) are both cambered surfaces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910154447.7A CN109668777B (en) | 2019-03-01 | 2019-03-01 | Test auxiliary device for detecting concrete splitting tensile strength |
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| CN201910154447.7A CN109668777B (en) | 2019-03-01 | 2019-03-01 | Test auxiliary device for detecting concrete splitting tensile strength |
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| CN109668777B true CN109668777B (en) | 2021-04-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110018051B (en) * | 2019-05-13 | 2021-11-16 | 江苏塑光汽车部件有限公司 | Device and method for testing strength of automobile air conditioner condenser |
| CN111238968A (en) * | 2020-02-26 | 2020-06-05 | 西安交通大学 | Electromagnetic experimental device for testing impact mechanical property of composite material |
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