The failure mechanism of a 2D-C/SiC panel structure under strong acoustic loading

LUAN Xin-gang; YIN Liang-xuan; CHEN Yu-tong; CHEN Bo; CHENG Lai-fei; LI Hai-bo; WU Zhen-qiang

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Article Navigation > New Carbon Mater. > 2019 > 34(4): 373-381

LUAN Xin-gang, YIN Liang-xuan, CHEN Yu-tong, CHEN Bo, CHENG Lai-fei, LI Hai-bo, WU Zhen-qiang. The failure mechanism of a 2D-C/SiC panel structure under strong acoustic loading. New Carbon Mater., 2019, 34(4): 373-381.

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The failure mechanism of a 2D-C/SiC panel structure under strong acoustic loading

1.
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China;
2.
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing 100076, China

Funds: National Natural Science Foundation of China (51821091).

Received Date: 2019-04-02
Accepted Date: 2019-09-10
Rev Recd Date: 2019-07-01
Publish Date: 2019-08-28

Abstract

Abstract

A 2D-C/SiC composite panel is used in the thermal protection system of a hypersonic vehicle that is exposed to a combination of high force and temperature. Such an environment has a serious effect on the performance and structural dynamics of the panel. An acoustic test with an intensity ranging from 156 to 165 dB was carried out on a 2D-C/SiC panel. Its morphology before and after the test was obtained by infrared thermal imaging. The fracture morphology and the initiation and propagation positions of cracks were observed by SEM, and the failure mechanism of the 2D-C/SiC panel under strong acoustic loading was revealed. The composite panel showed fatigue failure caused by a combination of high frequency stretching and out-of-plane shearing. The former caused pull-out of carbon fibers and their brittle failure while the latter contributed to the rapid propagation of cracks.
- Strong acoustic loading,
- 2D-C/SiC,
- Ceramic matrix composites,
- Panel structure,
- Failure mechanism

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References(17)

References

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