Impact damage introduction clamp device for R-area structure

Abstract

The utility model discloses an R-area structure impact damage introduction clamp device which comprises a base, a shape follow-up support and a pressing piece, the base is used for being installed on an impact testing machine, the shape follow-up support is arranged on the base, the shape follow-up support is provided with an impact pit and two supporting faces, an included angle is formed between the two supporting faces, the two supporting faces are connected, and the pressing piece is arranged on the impact pit. The impact pit extends from one supporting face to the other supporting face, the pressing piece is detachably connected to the shape follow-up support or the base, and the pressing piece and the shape follow-up support are matched to press and fix a test piece. According to the clamp device, impact damage can be accurately introduced for the R-area structure of the composite material, a reliable reference basis is provided for test design, and the clamp device has important engineering and academic significance.

Description

Technical Field

[0001] The utility model relates to the technical field of impact testing, in particular to an R zone structure impact damage introduction fixture device. Background Art

[0002] In recent years, composite materials have been widely used in various engineering fields. Composite laminates are very sensitive to external impact, and the impact often involves the most sensitive delamination damage problem of composite materials. External impact is inevitable during the manufacturing, use and maintenance process. Since impact damage has a great influence on the structural bearing capacity, especially the pressure bearing capacity, the impact of impact damage on the structure must be considered during the aircraft structure test verification. Therefore, how to introduce impact damage more accurately and provide a reliable reference basis for test design is of great engineering and academic significance.

[0003] Therefore, the relevant test and development specifications all specify the method of introducing impact damage. At present, the American Society for Testing and Materials standard ASTM D 7136 / D 7136M (Standard test for damage resistance of composite materials to drop weight impact events) is generally used as the standard for research and development and verification tests in the development of aviation structures. For non-flat R-zone structure test pieces, the existing damage introduction fixtures are difficult or unable to meet the fixed support requirements of the test pieces, and it is difficult or impossible to use the existing test fixtures to conduct impact damage introduction research on the R-zone structure.

[0004] Since composite structural parts are usually formed by integrated curing, there are a large number of R-zone structures in typical structures such as composite C-frames, Z-frames, shear angle pieces, and beam flanges. Therefore, how to accurately introduce impact damage to composite R-zone structures and provide a reliable reference for experimental design is of great engineering and academic significance.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The utility model provides an R zone structure impact damage introduction clamp device.

[0007] This application provides the following technical solutions:

[0008] An R-zone structure impact damage introduction fixture device, comprising:

[0009] A base, the base being used for being installed on an impact testing machine;

[0010] A conformable support, the conformable support is arranged on the base, the conformable support has an impact pit and two support surfaces, the two support surfaces have an angle, and the two support surfaces are connected, and the impact pit extends from one support surface to the other support surface;

[0011] A pressing piece is detachably connected to the conformal support or the base, and the pressing piece and the conformal support cooperate to press and fix the test piece.

[0012] Optionally, the conformal support includes a main body and connecting parts arranged at both ends of the main body, and the connecting parts are used to be connected to the base through fasteners;

[0013] Two supporting surfaces are arranged on a side of the main body away from the base;

[0014] The impact pit divides the main body into two support arms, and the support arm has a portion of the support surface.

[0015] Optionally, a connecting hole is provided on the connecting portion, one end of the fastener passes through the connecting hole and is connected to the base, and the other end of the fastener is limited to the connecting portion.

[0016] Optionally, the R-zone structural impact damage introduction fixture device includes a limiting body, which is detachably connected to the base and is limited on both sides of the conformal support.

[0017] Optionally, the limiting body includes a limiting body and a connecting body connected to the limiting body;

[0018] The connecting body is connected to the base via a fastener;

[0019] The limiting body is limited at the edge of the conformal support.

[0020] Optionally, the pressing member is respectively connected to the limiting bodies on both sides of the conformal support, and the pressing member and the supporting surface jointly press the test piece.

[0021] Optionally, each of the limiting bodies has two connecting surfaces, and the two connecting surfaces are respectively parallel to the two supporting surfaces;

[0022] The two ends of the pressing member are respectively connected to two opposite connecting surfaces of the two limiting bodies.

[0023] Optionally, first fixing holes are provided at both ends of the pressing member;

[0024] A plurality of second fixing holes are arranged on the connecting surface, and each of the second fixing holes is arranged in sequence along the connecting surface;

[0025] The pressing member can move along the connecting surface, so that one end of the fastener can pass through the first fixing hole and be connected to a different second fixing hole on the connecting surface.

[0026] Optionally, the pressing member has a recessed groove for accommodating the edge structure of the test piece;

[0027] The recessed groove can cooperate with the supporting surface to press the test piece.

[0028] Optionally, the R zone structure impact damage introduction fixture device includes a plurality of support columns, each of the support columns is connected to a side of the base facing away from the conformal support, and each of the support columns is used to be installed on an impact testing machine.

[0029] By adopting the above technical solution, the present application has the following beneficial effects:

[0030] The fixture device of the present application is targeted at the R-zone structure of the composite material, can relatively accurately introduce impact damage, and provides a reliable reference basis for experimental design, which has important engineering and academic significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation of the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic diagram of the matching structure of the base and the supporting column in the R-zone structural impact damage introduction fixture provided by an embodiment of the utility model;

[0033] Figure 2 A schematic diagram of the matching structure of the base and the conformal support in the R-zone structural impact damage introduction fixture provided by an embodiment of the utility model;

[0034] Figure 3 A schematic diagram of the coordination structure of the base, the support column, the conformal support and the limiter in the R-zone structural impact damage introduction fixture provided by an embodiment of the utility model;

[0035] Figure 4 A state diagram of the R-zone structural impact damage introduction fixture device clamping the test piece provided in an embodiment of the utility model.

[0036] In the figure: 1. Conformal support; 11. Impact pit; 12. Support surface; 2. Base; 3. Support column; 4. Limiting body; 41. Connection surface; 5. Pressing piece; 6. Test piece. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figures 1 to 4 As shown, an embodiment of the present application provides an R-zone structure impact damage introduction fixture device, including: a base 2, a conformal support 1 and a clamping piece 5. The base 2 is used to be installed on an impact testing machine, and the conformal support 1 is arranged on the base 2. The conformal support 1 has an impact pit 11 and two support surfaces 12. The two support surfaces 12 have an angle, and the two support surfaces 12 are connected. The impact pit 11 extends from one support surface 12 to the other support surface 12. The clamping piece 5 is detachably connected to the conformal support 1 or the base 2, and the clamping piece and the conformal support 1 cooperate to clamp and fix the test piece 6. It should be noted that the detachable connection of the clamping piece 5 to the conformal support 1 or the base 2 can be directly connected or indirectly connected.

[0041] In the embodiment of the present application, the conformal support 1 has two support surfaces 12 arranged at a certain angle, so that the two side surfaces of the test piece 6 with the R zone structure can be respectively attached to the corresponding support surfaces 12, so that impact damage can be conveniently and accurately introduced at the R zone position of the test piece 6. The fixture device of the present application is targeted at the R zone structure of the composite material, and can more accurately introduce impact damage, providing a reliable reference basis for test design, and has important engineering and academic significance.

[0042] In some possible implementations, the conformal support 1 includes a main body and connecting parts arranged at both ends of the main body, the connecting parts are used to be connected to the base 2 through fasteners, two supporting surfaces 12 are arranged on the side of the main body away from the base 2, the impact pit 11 divides the main body into two supporting arms, and the supporting arm has part of the supporting surface 12. The main body is generally in an upward convex triangular structure, and a concave impact pit 11 is arranged in the middle to ensure that the test piece 6 is effectively introduced with impact damage.

[0043] In some possible implementations, a connection hole is provided on the connection portion, one end of a fastener passes through the connection hole and is connected to the base 2, and the other end of the fastener is limited to the connection portion. The fastener may be a bolt. A plurality of fixing holes may be provided on the base 2, and the position of the conformable support 1 may be moved and fixed to the corresponding fixing holes by the fastener.

[0044] In some possible implementations, the R zone structural impact damage introduction fixture device includes a limiter 4, which is detachably connected to the base 2, and the limiter 4 is limited to both sides of the conformable support 1. The limiter 4 can be a metal structure, fixed on the base 2, and limited to both sides of the conformable support 1, further fixing the position of the conformable support 1.

[0045] The limiting body 4 may include a limiting body and a connecting body connected to the limiting body, the connecting body is connected to the base 2 via a fastener, and the limiting body is limited at the edge of the conformal support 1.

[0046] The cross section of the stopper 4 can be the same as the cross section of the edge of the main body, and the surface of the stopper 4 is tightly fitted with the end of the main body. The connector can be a plate, and a plurality of connection holes can be provided on the connector to be fixed to the base 2 by fasteners.

[0047] In some possible implementations, the pressing member 5 is respectively connected to the limiting bodies 4 on both sides of the conformal support 1, and the pressing member 5 and the supporting surface 12 jointly press the test piece 6. The two ends of the pressing member 5 can be respectively installed on the limiting bodies 4, and the pressing member is pressed on the surface of the test piece 6 to fix the test piece 6. Finally, the positioning and fixing of the R zone structure test piece 6 is achieved, which is convenient for introducing impact damage through the impact tester.

[0048] In some possible implementations, each of the position limiting bodies 4 has two connecting surfaces 41, the top edges of the two connecting surfaces 41 are connected, and the two connecting surfaces 41 are respectively parallel to the two supporting surfaces 12. The two ends of the pressing member 5 are respectively connected to the two opposite connecting surfaces 41 of the two position limiting bodies 4. The connecting surfaces 41 on the same side of the two position limiting bodies 4 can be located in the same plane, so that when the two ends of the pressing member 5 are respectively connected to the connecting surfaces 41 on the same side of the two position limiting bodies 4, the distance between the pressing member 5 and the corresponding supporting surface 12 is constant, and the sample piece can be stably squeezed and fixed.

[0049] In some possible implementations, first fixing holes are provided at both ends of the clamping member 5, and a plurality of second fixing holes are provided on the connection surface 41, and each of the second fixing holes is sequentially provided along the connection surface 41. The clamping member 5 can move along the connection surface 41, so that one end of the fastener can pass through the first fixing hole and connect to different second fixing holes on the connection surface 41. The clamping member 5 can adjust its position relative to the connection surface 41 to match specimens of different sizes. The fastener can be a bolt, and the second fixing hole on the connection surface 41 can be a threaded hole.

[0050] In some possible implementations, the pressing member 5 has a concave groove for accommodating the edge structure of the test piece 6, and the concave groove can cooperate with the support surface 12 to compress the test piece 6. The bottom wall of the concave groove and the support surface 12 cooperate to compress the test piece 6. The provision of the concave groove is conducive to reducing the thickness of the pressing member 5.

[0051] In some possible implementation schemes, the R zone structural impact damage introduction fixture device includes a plurality of support columns 3, each of the support columns 3 is connected to a side of the base 2 away from the conformal support 1, and each of the support columns 3 is used to be installed on an impact testing machine.

[0052] Compared with traditional impact test devices, the clamp device of the present application has many beneficial effects: the clamp device of the present application can introduce impact damage on the R zone structure of the composite material; the clamp device of the present application can accurately control the impact position on the R zone structure; the clamp device of the present application can be matched with the existing test device, and the manufacturing cost of the device is low; the clamp device of the present application has a simple structure, is easy to use, and has a wide range of applications.

[0053] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details in detail, nor do they limit the present application to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can understand and use the present application well. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A fixture device for introducing impact damage to R-zone structure, characterized in that: include: A base, the base being used for being installed on an impact testing machine; A conformable support, the conformable support is arranged on the base, the conformable support has an impact pit and two support surfaces, the two support surfaces have an angle, and the two support surfaces are connected, and the impact pit extends from one support surface to the other support surface; A pressing piece is detachably connected to the conformal support or the base, and the pressing piece and the conformal support cooperate to press and fix the test piece.

2. The R zone structure impact damage introduction fixture device according to claim 1 is characterized in that: The conformable support comprises a main body and connecting parts arranged at both ends of the main body, and the connecting parts are used to be connected to the base through fasteners; Two supporting surfaces are arranged on a side of the main body away from the base; The impact pit divides the main body into two support arms, and the support arm has a portion of the support surface.

3. The R zone structure impact damage introduction fixture device according to claim 2 is characterized in that: The connecting portion is provided with a connecting hole, one end of the fastener passes through the connecting hole and is connected to the base, and the other end of the fastener is limited to the connecting portion.

4. The R zone structure impact damage introduction fixture device according to claim 1, characterized in that: It comprises a limiting body, which is detachably connected to the base and is limited on two sides of the conformal support.

5. The R zone structure impact damage introduction fixture device according to claim 4 is characterized in that: The limiting body includes a limiting body and a connecting body connected to the limiting body; The connecting body is connected to the base via a fastener; The limiting body is limited at the edge of the conformal support.

6. The R zone structure impact damage introduction fixture device according to claim 4, characterized in that: The pressing members are respectively connected to the limiting bodies on both sides of the conformal support, and the pressing members and the supporting surface jointly press the test piece.

7. The R-zone structure impact damage introduction fixture device according to claim 6, characterized in that: Each of the limiting bodies has two connecting surfaces, and the two connecting surfaces are respectively parallel to the two supporting surfaces; The two ends of the pressing member are respectively connected to two opposite connecting surfaces of the two limiting bodies.

8. The R-zone structure impact damage introduction fixture device according to claim 7, characterized in that: Both ends of the pressing member are provided with first fixing holes; A plurality of second fixing holes are arranged on the connecting surface, and each of the second fixing holes is arranged in sequence along the connecting surface; The pressing member can move along the connecting surface, so that one end of the fastener can pass through the first fixing hole and be connected to a different second fixing hole on the connecting surface.

9. The R zone structure impact damage introduction fixture device according to any one of claims 1 to 8, characterized in that: The pressing piece has a concave groove for accommodating the edge structure of the test piece; The recessed groove can cooperate with the supporting surface to press the test piece.

10. The R zone structure impact damage introduction fixture device according to any one of claims 1 to 8, characterized in that: It comprises a plurality of supporting columns, each of which is connected to a side of the base away from the conformal support, and each of which is used for being installed on an impact testing machine.

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