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Measuring device and testing method for internal yarn mechanical properties of ceramic matrix composites

A technology of composite materials and testing devices, which is applied in the direction of measuring devices, analysis materials, and preparation of test samples. It can solve problems such as no patents for inventions, achieve convenient disassembly, improve precision, and avoid premature breakage.

Active Publication Date: 2021-02-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no reliable method to measure the mechanical properties of the yarn inside CMCs, and there is no published invention patent

Method used

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  • Measuring device and testing method for internal yarn mechanical properties of ceramic matrix composites
  • Measuring device and testing method for internal yarn mechanical properties of ceramic matrix composites
  • Measuring device and testing method for internal yarn mechanical properties of ceramic matrix composites

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Embodiment Construction

[0036] A device and method for testing the internal yarn mechanical properties of a ceramic matrix composite material proposed by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] Such as figure 1As shown, the device for testing the internal yarn mechanical properties of ceramic matrix composites includes: a testing machine chuck 1, and there are two testing machine chucks 1, respectively clamping the upper round bar 2 and the lower round bar 8, and the upper round bar 2 Connected to the bottom of the upper U-shaped clamp block 4, the upper pin 5 passes through the two side arms of the upper U-shaped clamp block 4 and the upper reinforcement piece 6 at the same time, and the upper reinforcement piece 6 is suspended at the opening of the upper U-shaped clamp block 4, The upper reinforcement piece 6 is fixedly connected to one end of the matrix fiber bundle 7, the lower round rod 8 is connected to the bottom of the lo...

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PUM

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Abstract

The invention provides a device for testing the internal yarn mechanical properties of ceramic matrix composite materials, including: a testing machine chuck, an upper round bar, a force sensor, a U-shaped clamp block, a pin, a reinforcing sheet, a fiber bundle with a matrix, a lower round bar and an extension The number of chucks of the testing machine is two, respectively clamping the upper round bar and the lower round bar; the upper round bar is connected with the U-shaped clamp block through the force sensor, and the lower round bar is directly connected with the U-shaped clamp block; The number of the U-shaped clips is two, which are connected with the reinforcement sheet by pins; Acquisition system connection. The test method using the device includes preparing a fiber bundle with a matrix, fixing it on a test device, performing a pull-up test on a testing machine, and measuring the elastic modulus and strength of the fiber bundle with a matrix through a force sensor and an extensometer. performance.

Description

technical field [0001] The invention belongs to the field of mechanical testing of composite materials, and in particular relates to a testing device and a testing method for the mechanical properties of internal yarns of ceramic matrix composite materials. Background technique [0002] Ceramic matrix composites (Ceramic Matrix Composite: hereinafter referred to as CMCs) have the advantages of high temperature resistance, high specific strength, high specific modulus, insensitivity to notches, and strong designability of material properties. They are ideal materials for high-temperature components of the next generation of aero-engines. . When CMCs are loaded, the inner yarn is the main load-bearing element, so the mechanical properties of yarns have an important influence on the mechanical properties of CMCs. In addition, in the mesomechanics method, domestic and foreign scholars often regard CMCs as yarn-reinforced composite materials, and use the mechanical behavior of y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/04G01N1/28
Inventor 张盛高希光宋迎东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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