首先在小弹塑性范围内用应变的奇次四项式相当精确地拟合一般硬化材料的拉伸曲线；
This paper pressents a polynomial with four odd terms to fit the stress-strain relation for the materials with arbitrary hardening behaviour in the region of small elastoplastic deformation.
论文所完成的工作扩大了ABAQUS在弹塑性有限元分析中的应用范围，并为ABAQUS其他功能的开发以及有限元程序的开发提供了借鉴。
This work expands the application range of ABAQUS in elastoplastic finite element analysis, and set an example for developing other functions of ABAQUS and finite element software.
在承受载荷时，其局部范围大多产生弹-塑性变形。
When the load is applied, some local area will yield elastic - plastic deformation.
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