Interlaminar shear behaviors of 2D needled C/SiC composites under compressive and tensile loading

被引：15

作者：

Liang, Xiaoqiang ^{[1
,2
]}

Gao, Xiguang ^{[1
,2
]}

Zhang, Huajun ^{[3
]}

Yu, Guoqiang ^{[1
,2
]}

Xie, Chuyang ^{[1
,2
]}

Zhang, Shirong ^{[1
,2
]}

Song, Yingdong ^{[1
,2
,4
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Key Lab Aeroengine Thermal Environm & Struct, Minist Ind & Informat Technol, Nanjing 210016, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, Nanjing 210016, Peoples R China

[3] Chinese Peoples Liberat Army, Mil Representat Off 2, Chengdu 610000, Peoples R China

[4] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 04期

关键词：

C/SiC composites; Interlaminar shear; Digital image correlation; Acoustic emissions; ACOUSTIC-EMISSION; INPLANE; STRENGTH;

D O I：

10.1016/j.ceramint.2020.10.071

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The interlaminar shear strength of 2D needled C/SiC composites was measured using the double-notch shear test method. Interlaminar shear tests were performed under compressive and tensile loading. Shear stress-strain response and shear strain field evolution were studied using the digital image correlation (DIC) technique. The results show that the interlaminar shear strength of the specimen using the compressive loading method is 15% higher than that of the tensile loading method. Severe shear strain concentration was observed near the upper notch of the tensile loading specimen. Acoustic emission (AE) was utilized to monitor the damage during the tests. Typical damage mechanisms were categorized according to AE signal characteristics. The statistical results show that more matrix cracks were produced in the tensile loading specimen and no separate fiber/matrix debonding signal was detected in both specimens.

引用

页码：4954 / 4962

页数：9

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