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Biaxial tension-shear test part with matrix fiber bundle and preparation method thereof

A technology of biaxial tensile shearing and matrix fiber, which is applied in the preparation of test samples, measuring devices, instruments, etc., to reduce the cost of experiments, simplify the installation process, and prevent torsion and slippage

Active Publication Date: 2015-09-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a biaxial tension-shear test piece with a matrix fiber bundle that is simple to manufacture, low in test cost, good in test piece quality, and not easy to slip, and its preparation method

Method used

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  • Biaxial tension-shear test part with matrix fiber bundle and preparation method thereof
  • Biaxial tension-shear test part with matrix fiber bundle and preparation method thereof
  • Biaxial tension-shear test part with matrix fiber bundle and preparation method thereof

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Embodiment Construction

[0032] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] The preparation method of the biaxial tensile-shear test piece with matrix fiber bundle of the present invention comprises the following steps:

[0034] Step 1. In order to keep the prepared fiber bundle sample with matrix consistent with the shape of the woven composite material, and to make the fiber bundles distributed periodically, pull out the weft yarn in the middle part of the two-dimensional woven fiber cloth and only keep the warp yarn in the middle region of the fiber cloth 2 and fix the multi-layer extraction fiber cloth to the mold to deposit the matrix to make a round tube sample 5, such as figure 1 , figure 2 shown;

[0035] Step 2. Place the anti-crushing plug 3 made of high thermal expansion coefficient and high compressive stiffness material in an environment of 0°C to -10°C to make its volume smaller; the high therma...

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Abstract

The invention discloses a biaxial tension-shear test part with a matrix fiber bundle. The biaxial tension-shear test part comprises a circular pipe sample and is characterized in that the circular pipe sample comprises a fiber cloth deposited matrix, the middle of the circular pipe sample is a test part, two ends of the circular pipe sample are fixing parts, a fiber cloth located at the test part of the circular pipe sample is a fiber structure which only contains warp yarn and does not contain weft yarn, conquassation-resistant plugs are in an interference fit relationship with the interiors of pipe cavities of the fixing parts of the circular pipe sample, and torque creep-resistant sleeves fixedly sleeve the peripheral surfaces of the fixing parts of the circular pipe sample. The biaxial tension-shear test part has the advantages of simple preparation processes, low experiment cost, good test part quality and difficult slipping.

Description

technical field [0001] The invention relates to the field of mechanical testing of composite materials, in particular to a biaxial tension-shear test piece with matrix fiber bundles and a preparation method thereof. Background technique [0002] Fiber bundles with a matrix are the main load-bearing structures in composite materials. The research shows that the macroscopic and mesoscopic mechanical behavior of composite materials can be studied through the mechanical properties of fiber bundles with matrix. It is a hot issue in the field of multi-scale calculation of composite materials to study the macroscopic and mesoscopic mechanical behavior of composite materials by taking fiber bundles with matrix as small composite materials. The tension-shear coupled stress state is one of the most common stress states in composite materials with matrix fiber bundles, so biaxial tension-shear experiments are needed to study the mechanical properties of matrix fiber bundles in depth. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N1/28
Inventor 高希光宋迎东于国强
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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