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铜单晶试样在滑移变形机制下的拉伸颈缩 被引量:1

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摘要 对FCC铜单晶的方形截面试样在滑移变形机制下的拉伸颈缩过程进行了分析.考虑真实的夹持条件和试验中拉伸轴与晶体[100]轴方向难以预知的微小偏轴,采用晶体塑性理论及晶体塑性有限变形计算方法对方形截面试样的三维颈缩进行了大变形模拟.通过与试验比较,证实模拟结果能够合理描述铜单晶试样在拉伸作用下的载荷位移关系,并用来研究铜单晶试样的颈缩变形形状特点和微小偏轴可能产生的影响.为了讨论试样截面形状的影响,还将单晶铜方形截面试样和圆柱试样的拉伸颈缩作了比较.
出处 《中国科学(E辑)》 CSCD 北大核心 2007年第7期866-874,共9页 Science in China(Series E)
基金 国家自然科学基金(批准号:10472092 10662001) 航空科学基金(批准号:04C53027)资助项目
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参考文献17

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