CN219625173U - Honeycomb sandwich structure plane shear sample preparation device - Google Patents
Honeycomb sandwich structure plane shear sample preparation device Download PDFInfo
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- CN219625173U CN219625173U CN202320782635.6U CN202320782635U CN219625173U CN 219625173 U CN219625173 U CN 219625173U CN 202320782635 U CN202320782635 U CN 202320782635U CN 219625173 U CN219625173 U CN 219625173U
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Abstract
The utility model discloses a honeycomb sandwich structure plane shear sample preparation device, which relates to the technical field of composite material mechanics test and comprises a positioning bottom plate, a plurality of longitudinal positioning pieces vertically arranged on the surface of the positioning bottom plate, a plurality of transverse positioning pieces vertically arranged on the surface of the positioning bottom plate, and positioning baffles vertically arranged on the surface of the positioning bottom plate, wherein each longitudinal positioning piece is used for being abutted with the long sides of a lower glue joint plate and a sample plate, each positioning baffle is used for being abutted with the wide side of the sample plate, and each transverse positioning piece is used for being abutted with the wide side of the lower glue joint plate and being matched with a bottom surface opening of an upper glue joint plate. The device for preparing the plane shear sample with the honeycomb sandwich structure can improve the accuracy of the connection position between the sample plate and the cementing plate, ensure the accurate positioning of the sample plate and the cementing plate and prevent the deflection condition between the sample plate and the cementing plate; meanwhile, the pressing pressure of the lower adhesive joint plate, the sample plate and the upper adhesive joint plate can be conveniently adjusted.
Description
Technical Field
The utility model relates to the technical field of composite material mechanical testing, in particular to a device for preparing a plane shear sample with a honeycomb sandwich structure.
Background
The honeycomb sandwich structure is widely applied to the field of satellite structural member development and production due to the characteristics of light weight, excellent mechanical properties, sound insulation, heat insulation and the like, the shear strength and the modulus of a core are one of important mechanical properties, and in the product development and production process, a tensile shear test is required to be carried out on a test piece of the honeycomb sandwich along with a furnace to judge whether the structure meets the use requirement.
At present, the test standard adopted in development and production is GB/T1455-2005 sandwich structure or core plane shear test method, wherein the preparation of a sample is regulated by the following steps: the adhesive of the two surfaces of the sample and the loading metal plates is roughened by using abrasive cloth, after the solvent is wiped clean, the sample is adhered between the two loading metal plates by using the adhesive, and the positions of the sample and the loading metal plates are the loading end of the metal plates which is longer than the sample by about 5mm. The glue cure temperature should be room temperature or at least 30 ℃ lower than the adhesive cure temperature of the sandwich structure, and the applied pressure does not affect the existing glue bond between the panel and the core.
In the actual preparation, due to the influence of factors such as installation errors, the relative position between the sample plate and the adhesive plate of the honeycomb sandwich structure is usually deviated, namely, a certain included angle exists between the sample plate and the adhesive plate along the loading direction (the length direction of the sample plate and the adhesive plate is theoretically required to be kept collinear), so that the mechanical property test result of the honeycomb sandwich structure is influenced, the accuracy of the result is low, and the data fluctuation in the same batch measurement is large.
Therefore, how to improve the accuracy of the connection position between the sample plate and the adhesive plate and prevent the deflection between the sample plate and the adhesive plate is a technical problem faced by those skilled in the art.
Disclosure of Invention
The utility model aims to provide a device for preparing a plane shear sample with a honeycomb sandwich structure, which can improve the accuracy of the connection position between a sample plate and a cementing plate, ensure the accurate positioning of the sample plate and the cementing plate and prevent the deflection between the sample plate and the cementing plate.
In order to solve the technical problems, the utility model provides a honeycomb sandwich structure plane shear sample preparation device which comprises a positioning bottom plate, a plurality of longitudinal positioning pieces, a plurality of transverse positioning pieces and a positioning baffle, wherein the longitudinal positioning pieces are vertically arranged on the surface of the positioning bottom plate, the transverse positioning pieces are vertically arranged on the surface of the positioning bottom plate, the positioning baffle is vertically arranged on the surface of the positioning bottom plate, each longitudinal positioning piece is used for being abutted with the long side of a lower glue joint plate and the long side of a sample plate, the positioning baffle is used for being abutted with the wide side of the sample plate, and each transverse positioning piece is used for being abutted with the wide side of the lower glue joint plate and being matched with a bottom surface opening of an upper glue joint plate.
Preferably, the device further comprises a supporting plate erected on the positioning bottom plate and a pressing assembly arranged on the supporting plate, wherein the pressing assembly is used for vertically pressing the upper glue joint plate.
Preferably, each of the longitudinal positioning members is uniformly distributed along the length direction of the positioning base plate.
Preferably, each of the longitudinal positioning members is a positioning fastener which forms a releasable connection with the positioning base plate.
Preferably, each of the lateral positioning members is uniformly distributed along the width direction of the positioning base plate.
Preferably, each of the lateral positioning members is a positioning fastener that forms a releasable connection with the positioning base plate.
Preferably, connecting fasteners detachably connected with the positioning bottom plate are arranged at two ends of the positioning baffle.
Preferably, the pressing assembly comprises a lifting driving rod which can vertically lift and is arranged on a supporting plate, an operating handle which is arranged on the supporting plate and is connected with the top end of the lifting driving rod, a loading transverse plate which is slidably arranged on the supporting plate and is connected with the bottom end of the lifting driving rod, and a loading part which is arranged on the loading transverse plate and is used for vertically pressurizing the upper cementing plate.
Preferably, the loading component comprises a plunger cylinder inserted in the loading transverse plate, a spring arranged in the plunger cylinder, a plunger rod slidably inserted in the plunger cylinder, a pressurizing plate connected to the outer end of the plunger rod, and a set screw arranged at the end part of the plunger cylinder and used for adjusting the deformation amount of the spring.
Preferably, the pressing assembly further comprises a guide rod arranged on the supporting plate and extending vertically, and a guide sleeve slidably sleeved on the guide rod, and the guide sleeve is connected with the loading transverse plate.
The utility model provides a device for preparing a plane shear sample with a honeycomb sandwich structure, which mainly comprises a positioning bottom plate, a longitudinal positioning piece, a transverse positioning piece and a positioning baffle plate. The positioning bottom plate is mainly used for realizing positioning and mounting of the sample plate, the lower adhesive joint plate and the upper adhesive joint plate, and is also used for mounting other parts of the device. The longitudinal locating pieces are vertically arranged on the surface of the locating bottom plate and are simultaneously provided with a plurality of longitudinal locating pieces, and each longitudinal locating piece is mainly used for being abutted with the long sides of the lower glue joint plate and the sample plate so as to locate the long sides of the lower glue joint plate and the sample plate. The transverse positioning pieces are vertically arranged on the surface of the positioning bottom plate and are simultaneously provided with a plurality of transverse positioning pieces, and each transverse positioning piece is mainly used for being abutted with the wide edge of the lower gluing plate so as to position the width of the lower gluing plate; meanwhile, the top ends of the transverse positioning pieces are also used for being matched with the bottom surface openings of the upper adhesive bonding plate so as to position the horizontal installation position of the upper adhesive bonding plate. The positioning baffle plate is erected on the surface of the positioning bottom plate and is mainly used for being abutted with the wide edge of the sample plate so as to position the width of the sample plate. Therefore, the honeycomb sandwich structure plane shear sample preparation device provided by the utility model can realize the horizontal position positioning of the lower adhesive joint plate on the positioning bottom plate through the combined action of each longitudinal positioning piece and each transverse positioning piece; the horizontal position positioning of the sample plate on the positioning bottom plate can be realized through the combined action of each longitudinal positioning piece and the positioning baffle plate; through the cooperation between each transverse locating piece and the bottom surface trompil of last glued joint board, can realize the horizontal position location of last glued joint board on the positioning bottom plate. As for the height position positioning, the lower adhesive joint plate is pressed on the surface of the positioning bottom plate according to the preparation method, the sample plate is pressed on the surface of the lower adhesive joint plate after the horizontal positioning, and the upper adhesive joint plate is pressed on the surface of the sample plate after the horizontal positioning. In summary, the device for preparing the planar shear sample with the honeycomb sandwich structure provided by the utility model can improve the accuracy of the connection position between the sample plate and the adhesive bonding plate, ensure the accurate positioning of the sample plate and the adhesive bonding plate, and prevent the deflection condition between the sample plate and the adhesive bonding plate.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic overall structure of an embodiment of the present utility model.
Fig. 2 is a schematic view showing a specific structure of the loading unit shown in fig. 1.
Wherein, in fig. 1-2:
a lower adhesive joint plate-a, a sample plate-b and an upper adhesive joint plate-c;
positioning bottom plate-1, longitudinal positioning piece-2, transverse positioning piece-3, positioning baffle-4, supporting plate-5 and pressing component-6;
connecting fasteners-41;
lifting driving rod-61, operating handle-62, loading cross plate-63, loading part-64, guiding rod-65 and guiding sleeve-66;
plunger cylinder-641, spring-642, plunger rod-643, pressing plate-644, set screw-645, connecting screw-646.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, fig. 1 is a schematic overall structure of an embodiment of the present utility model.
In one embodiment of the utility model, the honeycomb sandwich structure plane shear sample preparation device mainly comprises a positioning bottom plate 1, a longitudinal positioning piece 2, a transverse positioning piece 3 and a positioning baffle 4.
The positioning bottom plate 1 is mainly used for positioning and mounting the sample plate b, the lower adhesive bonding plate a and the upper adhesive bonding plate c, and is also used for mounting other parts of the device.
The longitudinal positioning pieces 2 are vertically arranged on the surface of the positioning bottom plate 1 and are simultaneously provided with a plurality of longitudinal positioning pieces, and each longitudinal positioning piece 2 is mainly used for being abutted with the long sides of the lower gluing plate a and the sample plate b so as to position the long sides of the lower gluing plate a and the sample plate b.
The transverse positioning pieces 3 are vertically arranged on the surface of the positioning bottom plate 1 and are simultaneously provided with a plurality of transverse positioning pieces, and each transverse positioning piece 3 is mainly used for being abutted with the wide edge of the lower gluing plate a so as to position the width of the lower gluing plate a; meanwhile, the top ends of the transverse positioning pieces 3 are also used for being matched with the bottom surface openings of the upper cementing plate c so as to position the horizontal installation position of the upper cementing plate c.
The positioning baffle 4 is arranged on the surface of the positioning bottom plate 1 and is mainly used for being abutted with the wide edge of the sample plate b so as to position the width of the sample plate b.
In this way, the honeycomb sandwich structure plane shear sample preparation device provided by the embodiment can realize the horizontal position positioning of the lower adhesive plate a on the positioning bottom plate 1 through the combined action of each longitudinal positioning piece 2 and each transverse positioning piece 3; the horizontal position positioning of the sample plate b on the positioning bottom plate 1 can be realized through the combined action of the longitudinal positioning pieces 2 and the positioning baffle plates 4; through the cooperation between each transverse locating piece 3 and the bottom surface open pore of last glued joint board c, can realize the horizontal position location of rubberizing board c on positioning bottom plate 1.
As for the height position positioning, the lower adhesive plate a is pressed on the surface of the positioning bottom plate 1 according to the preparation method, the sample plate b is pressed on the surface of the lower adhesive plate a after the horizontal positioning, and the upper adhesive plate c is pressed on the surface of the sample plate b after the horizontal positioning.
In summary, the device for preparing a planar shear sample with a honeycomb sandwich structure provided in this embodiment can improve the accuracy of the connection position between the sample plate b and the bonding plate, ensure the accurate positioning of the sample plate b and the bonding plate, and prevent the deflection between the sample plate b and the bonding plate.
In an alternative embodiment with respect to the longitudinal direction positioning members 2, the longitudinal direction positioning members 2 are simultaneously provided in 2 or more standing on the positioning base plate 1, and the respective longitudinal direction positioning members 2 are uniformly distributed on the positioning base plate 1 along the length direction thereof, i.e., the respective longitudinal direction positioning members 2 are arranged on the positioning base plate 1 in a straight line which is kept parallel to the long side of the positioning base plate 1. So arranged, when the lower adhesive plate a is mounted on the surface of the positioning base plate 1, the long sides of the lower adhesive plate a can be closely abutted against the respective longitudinal positioning members 2 (lower end regions), and the positioning of the lower adhesive plate a in the X-axis direction on the positioning base plate 1 is achieved. For the sample plate b, when the sample plate b is pressed against the surface of the lower adhesive plate a, the long side of the sample plate b can be closely abutted against each of the longitudinal positioning members 2 (upper end regions), and positioning of the sample plate b in the X-axis direction on the positioning base plate 1 can be achieved.
Of course, the height of each longitudinal positioning member 2 may also continue to extend, so that when the lower adhesive plate a is pressed against the surface of the sample plate b, the long side of the upper adhesive plate c may also be tightly abutted against each longitudinal positioning member 2 (upper end region), thereby realizing redundant positioning of the upper adhesive plate c.
Generally, considering that the lower adhesive plate a, the sample plate b and the upper adhesive plate c with different sizes are mounted on the positioning base plate 1, it may be necessary to adjust the mounting positions of the respective longitudinal positioning members 2 on the positioning base plate 1, for this, in this embodiment, each longitudinal positioning member 2 is a positioning fastener, such as a positioning pin, a positioning bolt, etc., which forms a detachable connection with the positioning base plate 1.
In an alternative embodiment with respect to the lateral positioning members 3, the lateral positioning members 3 are provided on the positioning base plate 1 in 2 or more at the same time, and the respective lateral positioning members 3 are uniformly distributed on the positioning base plate 1 along the width direction thereof, i.e., the respective lateral positioning members 3 are arranged on the positioning base plate 1 in a straight line which is kept parallel to the wide side of the positioning base plate 1. So arranged, when the lower adhesive plate a is mounted on the surface of the positioning base plate 1, the width edge of the lower adhesive plate a can be tightly abutted against each transverse positioning member 3, and the lower adhesive plate a can be positioned in the Y-axis direction on the positioning base plate 1.
Of course, since the top end of each lateral positioning member 3 is required to be matched with the bottom opening of the upper glue joint plate c, the height dimension of each lateral positioning member 3 is required to be designed according to the thickness dimensions of the lower glue joint plate a, the sample plate b and the upper glue joint plate c, so as to ensure that the bottom opening of the upper glue joint plate c is matched with the top end of each lateral positioning member 3 to form a shaft hole with proper depth.
Generally, considering that the lower adhesive plate a, the sample plate b and the upper adhesive plate c with different sizes are installed on the positioning base plate 1, it may be necessary to adjust the installation position of each lateral positioning member 3 on the positioning base plate 1, for this, in this embodiment, each lateral positioning member 3 is a positioning fastener that forms a detachable connection with the positioning base plate 1, such as a positioning pin, a positioning bolt, and the like.
In an alternative embodiment with respect to the positioning baffle 4, it is considered that the positioning baffle 4 is only used to form an abutment with the broad side of the sample plate b, which is placed on the surface of the lower glue plate a, and therefore, the positioning baffle 4 needs to be suspended on the surface of the positioning base plate 1, leaving a certain space between the positioning base plate 1, so as to facilitate the lower glue plate a to extend to form an abutment with each lateral positioning member 3. Meanwhile, when the lower adhesive plate a, the sample plate b and the upper adhesive plate c with different sizes are installed on the positioning base plate 1, the installation position of the positioning baffle plate 4 on the positioning base plate 1 may need to be adjusted, and for this, in this embodiment, the two ends of the positioning baffle plate 4 are provided with connecting fasteners 41, and the two ends of the positioning baffle plate 4 are detachably connected with the positioning base plate 1 through the connecting fasteners 41. In general, the connecting fastener 41 may be specifically a connecting bolt or the like, so that the positioning baffle 4 can be lifted up, and the assembling and disassembling operations can be performed easily.
In addition, considering that the lower adhesive plate a, the sample plate b and the upper adhesive plate c are adhered to each other by an adhesive as a whole, in order to make the three parts capable of being combined more tightly, the support plate 5 and the pressing assembly 6 are added in this embodiment. The support plate 5 is vertically arranged on the positioning bottom plate 1, the pressing assembly 6 is arranged on the support plate 5 and is mainly used for pressing the upper adhesive bonding plate c from top to bottom in the vertical direction so as to vertically press the upper adhesive bonding plate c, the sample plate b and the lower adhesive bonding plate a, thereby being beneficial to the flowing and full penetration of the adhesive of the three parts, avoiding the generation of air holes and the like between the surfaces between the adjacent parts and improving the adhesive bonding quality; meanwhile, the pressing pressure of the upper cementing plate c, the sample plate b and the lower cementing plate a can be conveniently adjusted by operating and controlling the pressing assembly 6.
Wherein the pressing assembly 6 mainly comprises a lifting drive rod 61, an operating handle 62, a loading cross plate 63 and a loading part 64. Wherein the elevation driving rod 61 is provided on the support plate 5 and is arranged in a vertical direction, and is capable of performing a vertical elevation movement on the support plate 5. The operating handle 62 is disposed on the supporting plate 5, and is generally located at a top end of the supporting plate 5, and is mainly used for being connected to a top end of the lifting driving rod 61, so as to drive the lifting driving rod 61 to perform vertical lifting motion through pulling operation. The loading cross plate 63 is disposed on the support plate 5 and connected to the bottom end of the lifting driving rod 61, and can slide on the support plate 5 along the vertical direction under the driving of the lifting driving rod 61. The loading member 64 is a core member inserted into the loading cross plate 63, and is capable of vertically outputting pressure, and is mainly used for vertically pressurizing the surface of the upper bonding plate c.
As shown in fig. 2, fig. 2 is a schematic diagram showing a specific structure of the loading part 64 shown in fig. 1.
In an alternative embodiment with respect to loading element 64, loading element 64 is embodied as a resilient plunger pressurizing element structure that basically comprises a plunger cylinder 641, a spring 642, a plunger rod 643, a pressurizing plate 644 and a set screw 645. Wherein plunger cylinder 641 is a main body member, has a cylindrical shape, and spring 642 is fitted in plunger cylinder 641 and is elastically deformable in the axial direction of plunger cylinder 641. Plunger rod 643 is inserted into the opening of plunger cylinder 641 and is axially slidably movable within plunger cylinder 641 to compress spring 642. The pressing plate 644 is connected to the outer end of the plunger rod 643 and has a generally rectangular plate-like structure, and is mainly used for pressing the surface of the upper adhesive plate c. The set screw 645 is disposed at a top end of the cylinder 641, and is mainly used to adjust a deformation amount of the spring 642 in the cylinder 641 by screwing, so as to adjust a pre-tightening force of the spring 642 and thus an elastic force of the spring 642. After the positioning and installation of the upper adhesive plate c, the sample plate b and the lower adhesive plate a are completed, the whole loading part 64 can be driven to move downwards through the operating handle 62 until the pressing plate 644 presses the surface of the upper adhesive plate c, and then the set screw 645 is adjusted according to the expected pressing pressure, so that the spring 642 generates a corresponding deformation amount, and the corresponding elastic force is loaded on the surface of the upper adhesive plate c through the pressing plate 644.
In addition, in order to improve the accuracy and stability of the vertical lifting movement of the loading member 64 on the support plate 5, the present embodiment further adds a guide rod 65 and a guide sleeve 66 in the pressing assembly 6. Wherein the guide rod 65 is provided on the surface of the support plate 5 and extends in the vertical direction, and the guide sleeve 66 is looped over the guide rod 65 and is slidable in the axial direction of the guide rod 65. At the same time, the guide sleeve 66 is also connected to the loading diaphragm 63. When the loading cross plate 63 and the loading part 64 are driven to vertically move up and down through the operating handle 62, the loading cross plate 63 and the whole loading part 64 are guided to move through the cooperation of the guide sleeve 66 and the guide rod 65.
To conveniently connect the pressing plate 644 and the plunger rod 643, in this embodiment, the pressing plate 644 and the plunger rod 643 are screwed by a connecting screw 646 to facilitate the assembling and disassembling operations.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a honeycomb sandwich structure plane shear sample preparation facilities, its characterized in that, includes locating baseplate (1), erects locate a plurality of longitudinal locating piece (2) on locating baseplate (1) surface, erects locate a plurality of transverse locating piece (3) on locating baseplate (1) surface, erect in locating baffle (4) on locating baseplate (1) surface, each longitudinal locating piece (2) be used for with lower cementing plate (a) and the long limit butt of sample board (b), locating baffle (4) be used for with the broadside butt of sample board (b), each transverse locating piece (3) be used for with the broadside butt of lower cementing plate (a) and with the bottom surface trompil cooperation of last cementing plate (c).
2. The device for preparing a planar shear sample of a honeycomb sandwich structure according to claim 1, further comprising a support plate (5) erected on the positioning base plate (1), and a pressing assembly (6) arranged on the support plate (5), wherein the pressing assembly (6) is used for vertically pressurizing the upper cementing plate (c).
3. The honeycomb sandwich structure planar shear sample preparation device according to claim 1, characterized in that the longitudinal positioning members (2) are uniformly distributed along the length direction of the positioning base plate (1).
4. A honeycomb sandwich structured planar shear sample preparation device according to claim 3, characterized in that each of the longitudinal positioning members (2) is a positioning fastener forming a releasable connection with the positioning base plate (1).
5. The honeycomb sandwich structure planar shear sample preparation device according to claim 1, characterized in that the transverse positioning members (3) are uniformly distributed along the width direction of the positioning base plate (1).
6. The honeycomb sandwich structure planar shear specimen preparation device according to claim 5, characterized in that each of the transverse positioning members (3) is a positioning fastener forming a detachable connection with the positioning base plate (1).
7. The honeycomb sandwich structure planar shear sample preparation device according to claim 1, characterized in that both ends of the positioning baffle (4) are provided with connecting fasteners (41) forming a detachable connection with the positioning bottom plate (1).
8. The honeycomb sandwich-structured planar shear sample preparation apparatus according to claim 2, wherein the pressing assembly (6) comprises a lifting drive rod (61) vertically liftably provided on a support plate (5), an operation handle (62) provided on the support plate (5) and connected to a top end of the lifting drive rod (61), a loading cross plate (63) slidably provided on the support plate (5) and connected to a bottom end of the lifting drive rod (61), and a loading member (64) mounted on the loading cross plate (63) for vertically pressurizing the upper bonding plate (c).
9. The honeycomb sandwich structure flat shear sample preparation device according to claim 8, wherein the loading member (64) comprises a plunger cylinder (641) inserted in the loading cross plate (63), a spring (642) provided in the plunger cylinder (641), a plunger rod (643) slidably inserted in the plunger cylinder (641), a pressurizing plate (644) connected to an outer end of the plunger rod (643), and a set screw (645) provided at an end of the plunger cylinder (641) for adjusting a deformation amount of the spring (642).
10. The honeycomb sandwich structure planar shear sample preparation device according to claim 8, wherein the pressing assembly (6) further comprises a guide rod (65) arranged on the supporting plate (5) and extending vertically, and a guide sleeve (66) slidably sleeved on the guide rod (65), and the guide sleeve (66) is connected with the loading transverse plate (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320782635.6U CN219625173U (en) | 2023-04-06 | 2023-04-06 | Honeycomb sandwich structure plane shear sample preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320782635.6U CN219625173U (en) | 2023-04-06 | 2023-04-06 | Honeycomb sandwich structure plane shear sample preparation device |
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| Publication Number | Publication Date |
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| CN219625173U true CN219625173U (en) | 2023-09-01 |
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| CN202320782635.6U Active CN219625173U (en) | 2023-04-06 | 2023-04-06 | Honeycomb sandwich structure plane shear sample preparation device |
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| Country | Link |
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| CN (1) | CN219625173U (en) |
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- 2023-04-06 CN CN202320782635.6U patent/CN219625173U/en active Active
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