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材料工程  2017, Vol. 45 Issue (7): 91-96    DOI: 10.11868/j.issn.1001-4381.2015.000582
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
2D-C/SiC复合材料偏轴拉伸力学行为研究
王波, 吴亚波, 郭洪宝, 贾普荣, 李俊
西北工业大学 力学与土木建筑学院, 西安 710072
Investigation on Off-axis Tensile Mechanical Behaviors of 2D-C/SiC Composites
WANG Bo, WU Ya-bo, GUO Hong-bao, JIA Pu-rong, LI Jun
School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710072, China
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摘要 通过对2D-C/SiC复合材料试件进行不同偏轴角度的拉伸实验,研究了偏轴角度对材料拉伸力学特性的影响。通过应变片分别测得了材料加载方向和纤维束方向上的应力-应变行为,对比分析了偏轴角度对上述应力-应变行为的影响;并结合试件断口扫描电镜照片,阐释了纤维束方向上拉伸和剪切损伤间的相互耦合效应。实验结果表明,材料的拉伸模量和强度随偏轴角度的增大出现明显下降;材料纤维束方向上的拉伸损伤和剪切损伤具有显著的相互促进作用。最后,以材料0°拉伸和45°拉伸实验数据为基础,建立了材料的偏轴拉伸应力-应变行为预测模型,模型预测结果与实验结果吻合较好。
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王波
吴亚波
郭洪宝
贾普荣
李俊
关键词 2D-C/SiC复合材料偏轴拉伸应力-应变行为损伤耦合预测模型    
Abstract:The off-axis tensile mechanical behaviors of 2D-C/SiC composite laminates were obtained by tests under different off-axis angles, and the influence of off-axis angle on the tensile mechanical behaviors was studied. By sticking strain gauges on the surfaces of specimens, the stress-strain behaviors in the loading direction and in the fiber bundle directions of material were obtained and analyzed. Combined with the SEM (scanning electron microscope) results of fractured surfaces on specimens, the coupling effects between tensile and shear damage in the fiber bundle directions were also analyzed. Test results show that the tensile modulus and strength of material decrease significantly with increasing off-axis angle; and there exists obvious mutual effect between tensile and shear damage in fiber bundle orientation. Furthermore, based on the stress-strain data obtained from 0° and 45° tensile tests, a predictive model was built to predict the off-axis tensile stress-strain behaviors of material. The prediction has good agreement with test data.
Key words2D-C/SiC composites    off-axis tension    stress-strain behavior    damage coupling    predictive model
收稿日期: 2015-05-11      出版日期: 2017-07-21
中图分类号:  O34  
  TB332  
通讯作者: 王波(1976-),男,副教授,博士,主要从事复合材料及其结构的力学行为研究,联系地址:陕西省西安市友谊西路127号西北工业大学118信箱(710072),E-mail:b.wang@nwpu.edu.cn     E-mail: b.wang@nwpu.edu.cn
引用本文:   
王波, 吴亚波, 郭洪宝, 贾普荣, 李俊. 2D-C/SiC复合材料偏轴拉伸力学行为研究[J]. 材料工程, 2017, 45(7): 91-96.
WANG Bo, WU Ya-bo, GUO Hong-bao, JIA Pu-rong, LI Jun. Investigation on Off-axis Tensile Mechanical Behaviors of 2D-C/SiC Composites. Journal of Materials Engineering, 2017, 45(7): 91-96.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.000582      或      http://jme.biam.ac.cn/CN/Y2017/V45/I7/91
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