材料工程Issue(5)：83-88,6.DOI:10.3969/j.issn.1001-4381.2013.05.017
2D-Cf/SiC复合材料缺口试件拉伸力学行为研究
Tensile Mechanical Behavior of Notched 2D-Cf/SiC Composites
郭洪宝 1王波 1矫桂琼 1刘永胜2
作者信息
- 1. 西北工业大学力学与土木建筑学院,西安 710129
- 2. 西北工业大学材料学院,西安 710072
- 折叠
摘要
Abstract
The influence of notch types on tensile mechanical behavior of 2D-Cf/SiC composite laminates was studied by experimental and numerical methods.Specimens with symmetrical V shape,half round shape and hairline shape notches were tested respectively.The relationship between net stress and tensile deformation closed to the notches was obtained with extensometer.With strain gauges on the surface of notched specimens,the strain variation between notches was obtained.And strain concentration effect was also clearly expressed.In accordance with the law of strain variation,the damage evolution and failure process of the notched specimens were analyzed.By comparing results with that of standard specimens,the failure mechanism of the notched 2D-Cf/SiC composites was discussed,the main influencing factors to the tensile strength were also determined.Furthermore,by finite element analysis (FEA),the strain distribution of notched specimens was simulated.The results indicate that there exists asynchronous damage evolution and failure process on material between notches during tensile process,and the specimen's net tensile strength decreases to some extent with different notch types; the FEA results have good agreement with experimental data.关键词
2D-Cf/SiC复合材料/缺口试件/拉伸/力学行为Key words
2D-Cf/SiC composite / notched specimen / tension / mechanical behavior分类
数理科学引用本文复制引用
郭洪宝,王波,矫桂琼,刘永胜..2D-Cf/SiC复合材料缺口试件拉伸力学行为研究[J].材料工程,2013,(5):83-88,6.
