双相钢有限元解的等值线处理方法

A Treatment to the Isoline for Finite Element Solution to Ferrite-Martensite Microstructure

鉴于F+M双相钢全相有限元网格在有限变形的情况下,数值解的抽样点应力场具有高梯度分布的特征,提出了按单元逐个进行抽样点插值的方法绘制双相钢金相组织微观应力分布场的等值线图以保证高梯度离散点应力场的后处理具有更好的保真度,同时也能解决双相钢变形后任意边界的问题。

The numerical solution of sample point stress field in finite element network of ferrite-martensite microstructure under finite deformation has a high-gradient distributive characteristic whose stress gradient between ferrite and martensite crystalline element is very high. If the interpolation method is used in the whole region,the isogram will be seriously smooth so that the original high-gradient sample point stress field will become untrue. This paper presents a new method for drawing isogram of ferrite-martensite microstructiire stress field by interpolating sample points in an element one by one. This method can make the post-treatment of high-gradient discrete stress field in crystalline network approach to a truer condition and solve the problem of arbitrary curve boundary of the deformed two phase steel.