• CN:11-2187/TH
  • ISSN:0577-6686

›› 2007, Vol. 43 ›› Issue (12): 190-193.

• 论文 • 上一篇    下一篇

材料局部力学性能测试方法

乔及森;周清林;王志成;朱亮;陈剑虹;赵少俊   

  1. 兰州理工大学有色金属国家重点实验室;兰州理工大学理学院
  • 发布日期:2007-12-15

METHOD IN TESTING OF MECHANICS PERFORMANCE OF MATERIALS LOCAL MECHANICAL BEHAVIOR

QIAO Jisen;ZHOU Qinglin;WANG Zhicheng;ZHU Liang;CHEN Jianhong;ZHAO Shaojun   

  1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology Institute of Science, Lanzhou University of Technology
  • Published:2007-12-15

摘要: 采用穿孔剪切试验和有限元模拟相结合的方法对材料的局部性能进行研究,通过将修正模拟阻力曲线与试验数据相匹配,在模拟分析中利用迭代修正的方法反向推导出材料的本构关系。由此提出利用穿孔剪切试验间接获得材料拉伸力学性能的基本方法。研究中以典型的车用铝合金材料(5052H34和6063T5)及紫铜作为测试对象,对该材料表征方法的精确性进行验证。分析表明,穿孔剪切试验结合有限元反求迭代技术获得材料拉伸应力-应变曲线关系与拉伸试验数据对比最大误差不超过5%,结果较为准确。该方法适用于微区或局部材料的力学性能表征,可为后续接头梯度力学性能研究提供参考。

关键词: 穿孔剪切测试, 局部力学性能, 有限元模拟

Abstract: Local mechanical behavior of materials was analyzed by means of punch-shearing test combined with a revised finite element simulation algorithm. For the numerical model, a special revised iterative process was put forward to work out the strain-stress curves for an unknown material by matching the simulated reaction force curves with those of test results. Therefore, an indirect method for material characteriza- tion was presented based on the punch-shearing test. In addition, the process accuracy was validated by using aluminium alloy 5052H34 and 6063T5 for automobile and red copper as test materials. The results show that maximum error between indirect and direct way is less than 5%, which can be accepted on the whole. This indirect material characterization method can be used for local or micro-zone material modeling, which will be a useful tool for material characterization of inhomo- geneous welded joints.

Key words: Finite element simulation, Local mechanical behavior, Punch-shearing test

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