| 微缺陷对高体积分数SiCp／Al复合材料拉伸性能的影响 |
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| 引用本文： | 康炘蒙,程小全,郦正能,张纪奎,崔岩.微缺陷对高体积分数SiCp／Al复合材料拉伸性能的影响[J].航空材料学报,2009,29(2):85-91. |
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| 作者姓名： | 康炘蒙 程小全 郦正能 张纪奎 崔岩 |
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| 作者单位： | 1. 北京航空航天大学航空科学与工程学院,北京,100191
2. 北京航空材料研究院,北京,100095 |
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| 基金项目： | 北京航空航天大学凡舟基金 |
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| 摘 要： | 建立了高体积分数SiCP/Al复合材料的微缺陷有限元模型,对其拉伸力学特性进行了模拟计算.通过对含孔洞、界面脱粘等典型微缺陷的模拟,发现孔洞的存在对材料性能影响不大;界面脱粘对材料承载性能影响最大,脱粘界面面积的大小与复合材料承载能力成反比.微缺陷之间的相对位置对材料拉伸性能的影响不同,靠近孔洞处界面脱粘比背离孔洞处界面脱粘使材料承载性能下降更大.进一步多颗粒模型的模拟分析,发现高体积分数SiCP/Al复合材料的非线性拉伸曲线与其内部颗粒界面逐步脱粘存在有一定的关系.在开始加载阶段脱粘比例递增较快,在接近破坏时脱粘比例递增减慢.
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| 关 键 词： | 金属基复合材料 拉伸 有限元 体积分数 |
Effect of Microdefects on Tensile Properties of High Volume Fraction SiC_p/Al Composites |
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| KANG Xin-meng,CHENG Xiao-quan,LI Zheng-neng,ZHANG Ji-kui,CUI Yan.Effect of Microdefects on Tensile Properties of High Volume Fraction SiC_p/Al Composites[J].Journal of Aeronautical Materials,2009,29(2):85-91. |
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| Authors: | KANG Xin-meng CHENG Xiao-quan LI Zheng-neng ZHANG Ji-kui CUI Yan |
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| Institution: | 1.School of Aeronautic Science and Engineering;Beijing University of Aeronautics and Astronautics;Beijing 100191;China;2.Beijing Institute of Aeronautical Materials;Beijing 100095;China |
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| Abstract: | The finite element models of high volume fraction SiCP/Al composites with microdefects were established.And the tensile mechanical properties of these composites were calculated.Through numerical simulation of typical microdefects as voids and interface debondings,it was found that the voids have a little effect on the tensile properties of this material.While interface debondings have the greatest effect on carrying load capability of the composites.Areas of debonded interfaces are inverse proportion to ca... |
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| Keywords: | SiCP |
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