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材料工程  2019, Vol. 47 Issue (10): 160-165    DOI: 10.11868/j.issn.1001-4381.2018.000674
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
2D-SiC/SiC复合材料损伤耦合力学行为
郭洪宝1,2, 谢骏1,2
1. 中国航发商用航空发动机有限责任公司, 上海 201108;
2. 上海商用飞机发动机工程技术研究中心, 上海 201108
Damage coupling mechanical behaviors of 2D-SiC/SiC composite
GUO Hong-bao1,2, XIE Jun1,2
1. AECC Commercial Aircraft Engine Co., Ltd., Shanghai 201108, China;
2. Shanghai Engineering Research Center of Commercial Aircraft Engine, Shanghai 201108, China
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摘要 基于轴向和45°偏轴加载实验,分别获得2D-SiC/SiC复合材料在单一轴向应力和复合应力状态下纤维束轴向方向上的拉伸、压缩和面内剪切应力-应变行为,计算分析材料在复合应力状态下的损伤耦合力学行为。结果表明,在45°偏轴拉伸和压缩复合应力状态下材料损伤耦合力学行为的起始应力分别约为40MPa和-100MPa。复合应力状态下材料纤维束轴向方向上的拉伸损伤和面内剪切损伤进程间具有相互促进作用,面内剪切损伤对压缩损伤进程具有促进作用,但是压缩应力分量对面内剪切损伤进程具有明显的抑制作用;上述损伤耦合作用随着应力水平的增加而越发显著。由试件断口电镜扫描结果可知,复合应力状态下材料纤维束轴向方向上3个应力分量对材料内部0°/90°和45° 3种取向基体裂纹开裂损伤进程的影响作用,是2D-SiC/SiC复合材料产生损伤耦合力学行为的主要细观损伤机制。
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郭洪宝
谢骏
关键词 2D-SiC/SiC复合材料应力-应变行为复合应力状态损伤耦合    
Abstract:By using axial and off-axis loading tests with off-axis angle as 45°, the tensile, compressive and in-plane shear stress-strain behaviors along the fiber bundles directions of a 2D-SiC/SiC composite were obtained, and the damage coupling mechanical behaviors of composite under combined stress condition were studied. The results show that the initial stress levels for the damage coupling mechanical behaviors of composite under 45° off-axis tensile and compressive loading conditions are 40MPa and -110MPa, separately. Under combined stress conditions, there exists obvious mutual acceleration between the tensile and the in-plane shear damage evolutions in the fibre bundles directions of composite, and the in-plane shear damage has accelerative effect on the compressive damage evolution, but the in-plane shear damage evolution is suppressed by compressive stress components obviously. These coupling effects become more significant with increasing stress level. The SEM (scanning electron microscope) pictures of fractured surfaces on off-axis loading specimens indicate that, in the fiber bundles directions, the mutual effects between the three stress components and the cracking evolutions of the three kinds of matrix cracks (oriented at 0°, 90° and 45°) are the main micro-damage mechanisms for the damage coupling mechanical behaviors of 2D-SiC/SiC composite under combined stress conditions.
Key words2D-SiC/SiC composite    stress-strain behavior    combined stress condition    damage coupling
收稿日期: 2018-06-03      出版日期: 2019-10-12
中图分类号:  O34  
  TB332  
通讯作者: 郭洪宝(1986-),男,工程师,博士,从事连续纤维增韧陶瓷基复合材料损伤力学行为研究,联系地址:上海市闵行区莲花南路3998号中国航发商用航空发动机有限责任公司基础技术部(201108),E-mail:guohongbao1101@126.com     E-mail: guohongbao1101@126.com
引用本文:   
郭洪宝, 谢骏. 2D-SiC/SiC复合材料损伤耦合力学行为[J]. 材料工程, 2019, 47(10): 160-165.
GUO Hong-bao, XIE Jun. Damage coupling mechanical behaviors of 2D-SiC/SiC composite. Journal of Materials Engineering, 2019, 47(10): 160-165.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2018.000674      或      http://jme.biam.ac.cn/CN/Y2019/V47/I10/160
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