CN217931105U

CN217931105U - Carbon/carbon composite material tensile test device

Info

Publication number: CN217931105U
Application number: CN202221384085.4U
Authority: CN
Inventors: 唐族娟; 尹延琪; 陈志强; 欧志威; 杨爱斌
Original assignee: Changzhou Yixiang Carbon Material Technology Co ltd
Current assignee: Changzhou Yixiang Carbon Material Technology Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-11-29
Anticipated expiration: 2032-06-06

Abstract

The utility model relates to a tensile properties test field especially relates to a charcoal/charcoal combined material tensile test device. The carbon/carbon composite material tensile testing device comprises 2 symmetrically-placed tool main bodies, wherein each tool main body is a cuboid block, a submerged sample groove for placing a sample is formed in each tool main body, a sample stop block is arranged above each sample groove and connected with each tool main body through screws, one end of a fixed shaft is connected to the upper end of each tool main body, and the other end of each fixed shaft is connected to a tensile test bed. The structure can lead the clamping section of the sample to be simultaneously acted by two forces, namely, the clamping force of the interaction of the sample stop block and the sample groove plays a role in fixing the sample; the other is the tensile force transferred to the test sample through the corner R of the tool.

Description

Carbon/carbon composite material tensile test device

Technical Field

The utility model relates to a tensile test device especially relates to a charcoal/charcoal combined material tensile test device.

Background

The tensile strength of the carbon/carbon composite material is one of important indexes for measuring the mechanical property of the carbon/carbon composite material product, and is also an important quality technical requirement for purchasing the carbon/carbon composite material product.

The currently common tensile test method for carbon/carbon composite materials is to clamp a sample by using a flat clamping block with grains, and generate friction force by the grains on the clamping surface of the clamping block and the pressing force of the clamping block on the sample, so that the sample cannot slide with the clamping block in the tensile process, and the validity of a test result is ensured. There are many tensile tests using a flat clamping block, such as a tensile test of a metal material and a tensile test of a plastic material, but since a carbon/carbon composite material has a graphite component, which makes a sample have lubricity and brittleness, there may be three problems in the tensile test using a flat clamping block: firstly, when a sample is clamped by using the flat clamping block, the clamping force of the clamping section is not easy to control, the clamping section may be loosened due to too small clamping force, and the sample clamping section may be directly broken due to too large clamping force; secondly, in the process of tensile test, when load is applied at a certain speed, due to the self-lubricating property of the test sample, the test sample and the flat clamping block can relatively move (commonly called slipping), the surface layer of the clamping section is further crushed or layered, so that the tensile load suddenly drops, the test stops, and no visible crack or fracture exists in the working section of the test sample, so that the test result is invalid; thirdly, in order to ensure that the sample is not loosened, the flat clamping block needs to be pressed very tightly, so that the sample is very difficult to mount and dismount. If the tensile novel anchor clamps of plastics are used for reference and carbon-carbon composite material tensile test is carried out, problem in two aspects can appear at tensile process: firstly, the sample is not fixed at the sample groove, and the clamping section is tilted and popped up; and secondly, the sample tilts, so that the shearing damage of the clamping end of the sample at the R angle is caused, and the result is an invalid test result.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving above-mentioned defect, avoided the sample at the fracture of centre gripping section and the sliding of tensile in-process in the clamping process, also avoided the perk of sample at tensile in-process simultaneously, and then improved the validity of test result, also make the installation and the dismantlement of sample become simple simultaneously, provide a charcoal/charcoal combined material tensile test device.

In order to overcome the defect that exists among the background art, the utility model provides a technical scheme that its technical problem adopted is: the carbon/carbon composite material tensile testing device comprises 2 symmetrically-placed tool main bodies, wherein each tool main body is a cuboid block, a submerged sample groove for placing a sample is formed in each tool main body, a sample stop block is arranged above each sample groove and connected with each tool main body through screws, one end of a fixed shaft is connected to the upper end of each tool main body, and the other end of each fixed shaft is connected to a tensile test bed.

According to the utility model discloses a further embodiment, further include the shape of sample groove is narrow down for wide the top, and the below of sample groove is provided with the symmetry R angle that contracts inwards, laminate with the sample.

According to the utility model discloses a further embodiment, further include the fixed axle includes the screw thread part of being connected with the frock main part and with tensile test bench connecting portion, seted up the pinhole on connecting portion with tensile test bench, link to each other with tensile test bench through the pin.

The beneficial effects of the utility model are that: the carbon/carbon composite material tensile testing device transmits force to the sample through the R angle which is accurately designed and attached to the sample and the R angle; the sample is fixed by the interaction of the stopper and the sample groove. Compared with the conventional clamp, the structure can enable the clamping section of the sample to be simultaneously acted by two forces, namely the clamping force of the interaction of the sample stop block and the sample groove plays a role in fixing the sample; the other is the tensile force transferred to the test sample through the corner R of the tool. Because this frock does not have flat clamp splice centre gripping sample, does not have the unfixed condition of sample yet, has avoided the sample to be at the fracture of centre gripping section and the slip of tensile in-process in the clamping process, has also avoided the perk of sample in tensile in-process simultaneously, and then improves the validity of test result, also makes the installation and the dismantlement of sample become simple simultaneously.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural view of the tool body;

FIG. 4 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural view of a perspective view of the tool body;

in the figure: 1. the tool comprises a tool main body, 2 parts of a sample stop block, 3 parts of a stop block screw, 4 parts of a sample groove, 5 parts of a sample groove R angle, 6 parts of a connecting screw rod, 7 parts of a fixed shaft, 8 parts of a sample, 9 parts of a pin and 10 parts of a tensile test bed.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The embodiments of the basic utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Connecting the carbon/carbon composite material tensile testing device with a testing machine, then placing the standard sample in the carbon/carbon composite material tensile testing device for fixing, and then applying tensile load at a certain speed until the sample is broken, thus obtaining the tensile strength of the sample. The structure of the carbon/carbon composite material tensile testing device is shown in figures 1-5, and comprises 2 tool main bodies 1 which are symmetrically arranged, wherein each tool main body 1 is a cuboid block, a submerged sample groove 4 for placing a sample 8 is arranged on each tool main body 1, a sample stop block 2 is arranged above each sample groove 4, each sample stop block 2 is connected with each tool main body 1 through a screw 3, one end of a fixed shaft 6 is connected to the upper end of each tool main body 1, and the other end of each fixed shaft 6 is connected to a tensile test bed 10.

The sample well 4 is formed to have a wide top and a narrow bottom, and a symmetric R-angle 5 which is inwardly contracted and attached to the sample 8 is provided below the sample well 4. A sample 8 is placed in the sample groove 4, and the symmetrical R angle 5 is attached to the sample 8 so as to transfer the tensile force.

The purpose of the fixed shaft 6 is to connect the tool body 1 to the test bed 10, the fixed shaft 6 comprises a threaded part connected with the tool body 1 and a part connected with the tensile test bed 10, a pin hole is arranged on the part connected with the tensile test bed 10, and the pin hole is connected with the tensile test bed 10 through a pin 9.

Example (b):

as shown in fig. 1 and 2, the carbon/carbon composite material tensile testing device is composed of 2 tool main bodies 1 which are symmetrically arranged, a standard sample is placed in a sample groove 4, a stop block 2 on the tool main body 1 is screwed and fixed through a screw 3, a fixed shaft 6 on the tool main body 1 is connected with a tensile test bed 10 through a pin 9, and the tensile load is applied to the test bed 10 at a certain speed until the sample is broken, so that the tensile strength of the sample can be obtained.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a charcoal/carbon combined material tensile test device, includes 2 symmetrical tool main bodies (1) of placing, its characterized in that: the tool main body (1) is a cuboid block, a submerged sample groove (4) for placing a sample (8) is formed in the tool main body (1), a sample stop block (2) is arranged above the sample groove (4), the sample stop block (2) is connected with the tool main body (1) through a screw (3), one end of a fixed shaft (6) is connected to the upper end of the tool main body (1), and the other end of the fixed shaft (6) is connected to a tensile test bed (10).

2. The carbon/carbon composite tensile test apparatus of claim 1, wherein: the shape of the sample groove (4) is wide at the top and narrow at the bottom, and an inward-contracting symmetrical R angle (5) which is attached to the sample (8) is arranged below the sample groove (4).

3. The carbon/carbon composite tensile test apparatus of claim 1, wherein: the fixed shaft (6) comprises a threaded part connected with the tool main body (1) and a connecting part connected with the tensile test bed (10), a pin hole is formed in the connecting part with the tensile test bed (10), and the fixed shaft is connected with the tensile test bed (10) through a pin (9).