CN-224231438-U - Clamp for compression test of composite material foam sandwich structure

Abstract

The utility model discloses a clamp for a composite material foam sandwich structure compression test, which comprises a base plate, corner plates, a bottom guide plate, side guide plates and a top guide plate, wherein the number of the corner plates is two, the distance between the left guide plate and the right guide plate is adjustable, the number of the side guide plates is four, two groups of the side guide plates are correspondingly arranged on opposite end surfaces of the two corner plates and are used for restraining two side edges of a sample piece, the distance between the front side guide plates and the rear side guide plates arranged on the same corner plate is adjustable, the bottom guide plate is two, the distance between the front side guide plates and the rear side guide plates is adjustable, the front guide plates and the rear side guide plates are arranged on the base plate and are used for restraining the bottom edges of the sample piece, and the distance between the top guide plates is adjustable and are arranged on an end loading plate and are used for restraining the top edges of the sample piece. The compression test device is simple in structure, can adapt to test pieces with different thicknesses, and can effectively restrain the test pieces.

Inventors

• YANG KANG
• ZHANG QINGXIN
• XIONG XUHAI
• FAN XINYUE
• GENG HAO
• MENG XIANGCHENG
• ZHENG SHUANG
• WANG JI

Assignees

• 辽宁通用航空研究院
• 沈阳航空航天大学

Dates

Publication Date

20260512

Application Date

20250421

Claims (5)

1. 1. The clamp for the composite material foam sandwich structure compression test is characterized by comprising a base plate (1), angle plates (2), a bottom guide plate (3), side guide plates (4) and a top guide plate (5), wherein the angle plates (2) are arranged on the base plate (1) at two left and right intervals with adjustable intervals, the side guide plates (4) are arranged on opposite end surfaces of the two angle plates (2) in a group of four and two-by-two correspondence manner, the clamp is used for restraining two side edges of a test piece (10), the front and back intervals of the two side guide plates (4) arranged on the same angle plate (2) are adjustable, the bottom guide plates (3) are arranged on the base plate (1) at two front and back intervals with adjustable intervals, the bottom guide plates are used for restraining the bottom edges of the test piece (10), and the top guide plates (5) are arranged on an end loading plate (6) at two front and back intervals with adjustable intervals, and the top edges of the test piece (10) are restrained.
2. 2. The clamp for the composite foam sandwich structure compression test according to claim 1, wherein the base plate (1) and the corner plate (2), the base plate (1) and the bottom guide plate (3), the corner plate (2) and the side guide plate (4) and the top guide plate (5) and the end loading plate (6) are all connected through bolts, at least one of the two connected components is provided with a long hole matched with the bolt, and the bolt passes through the long hole and is fixedly connected with the other component.
3. 3. The clamp for the composite foam sandwich structure compression test according to claim 1, further comprising an anti-instability structure (7), wherein the anti-instability structure (7) is arranged between two groups of side guide plates (4) at left and right intervals and used for normally restraining a sample piece (10).
4. 4. A composite foam sandwich structure compression test fixture according to claim 3, characterized in that the anti-destabilization structure (7) is a baffle for fitting with the front/rear end face of the test piece (10).
5. 5. The fixture for compression test of composite foam sandwich structure according to claim 3, wherein the instability preventing structure (7) is a rotating shaft, and the rotating shaft is used for being attached to the front/rear end face of the test piece (10).

Description

Clamp for compression test of composite material foam sandwich structure Technical Field The utility model relates to the technical field of aerospace, and particularly provides a clamp for a composite material foam sandwich structure compression test. Background The composite material has the excellent performances of light weight, high strength, corrosion resistance, fatigue resistance and the like, so that the composite material becomes an important material for structural design and manufacture of an aerospace vehicle, and is widely applied to the aerospace field, wherein the composite material foam sandwich structure is light in weight, high in strength and capable of effectively improving the shock resistance of the composite material, and is widely applied to various high-performance components such as a wing front edge, a rudder, an undercarriage cabin door, a wing body, a wing tip fairing and the like. The compression bearing test after impact is an important assessment index for verifying whether the design of the composite material foam sandwich structure meets the requirements. However, the conventional compression test fixture has a simple structure, as shown in fig. 3, and includes a base assembly 1' and a top assembly 2', wherein the inner side of the base assembly 1' and the lower portion of the top assembly 2' are both provided with a gap of a fixed width in advance to accommodate test pieces 3' of a specified thickness, however, in the test process, the thicknesses of the test pieces are not uniform, different fixtures need to be replaced for test pieces of different thicknesses, in addition, not all the test pieces are of equal thickness, and many test pieces 10 are of variable thickness (as shown in fig. 2), and if the test pieces of variable thickness are restrained by the fixtures, effective restraint on the test pieces cannot be realized. Therefore, a novel clamp for compression test is provided to adapt to test pieces with different thicknesses and test pieces with variable thicknesses, and the problem to be solved is urgent. Disclosure of utility model In view of the above, the present utility model aims to provide a clamp for compression test of composite foam sandwich structure, so as to solve the problems that the conventional clamp for compression test is only suitable for a sample piece with a fixed thickness and can not effectively restrict each boundary of a sample piece with a variable thickness. The technical scheme is that the clamp for the composite material foam sandwich structure compression test comprises a base plate, corner plates, bottom guide plates, side guide plates and top guide plates, wherein the number of the corner plates is two, the distance between the left guide plates and the right guide plates is adjustable, the number of the side guide plates is four, two groups of the side guide plates are correspondingly arranged on opposite end faces of the two corner plates and are used for restraining two side edges of a sample piece, the front-back distance between the two side guide plates arranged on the same corner plate is adjustable, the bottom guide plates are arranged on the base plate in a front-back distance manner and are used for restraining the bottom edge of the sample piece, the number of the top guide plates is two, the distance between the front-back guide plates and the distance between the top guide plates are adjustable and are arranged on an end loading plate and are used for restraining the top edge of the sample piece. Preferably, the base plate and the angle plate, the base plate and the bottom guide plate, the angle plate and the side guide plate and the top guide plate and the end loading plate are all connected through bolts, at least one of the two connected components is provided with a long hole matched with the bolt, and the bolt passes through the long hole and is fixedly connected with the other component. Further preferably, the fixture for the composite foam sandwich structure compression test further comprises an anti-instability structure, wherein the anti-instability structure is arranged between two groups of side guide plates at left and right intervals and used for normally restraining the test piece. Further preferably, the destabilizing structure is a baffle plate for fitting with the front/rear end face of the sample. Further preferably, the destabilizing structure is a rotating shaft for attaching to the front/rear end face of the test piece. The clamp for the composite material foam sandwich structure compression test has a simple structure, can be suitable for test pieces with different thicknesses, and can realize effective constraint on the test pieces. Drawings The utility model will be described in further detail with reference to the accompanying drawings and embodiments: FIG. 1 is a schematic structural view of a clamp for a composite foam sandwich structure compression test, which is provided by the utility mod