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为便于工程应用,该文对已有的关于微电子封装63Sn-37Pb钎料合金材料的时相关变形本构模型在有限元软件ABAQUS上进行了移植。在有限元移植中,鉴于该时相关本构模型的复杂性,该文对传统的隐式算法进行了适当的修正处理,对现时内变量进行了更新;自行推导了一致切线刚度矩阵,以提高有限元程序的平衡迭代效率;对63Sn-37Pb钎料合金的多种加载工况进行了数值模拟,移植后的数值模拟结果与已得到验证过的数值模拟结果的比较表明该文的有限元移植是合理成功的;最后,作为应用的一个实例,该文对该材料的剪切结构试样进行了循环加载下的有限元模拟。
In order to facilitate the application, the time-dependent deformation constitutive model of 63Sn-37Pb solder alloy has been transferred to the ABAQUS finite element software. In the finite element migration, given the complexity of the related constitutive model, the paper modified the traditional implicit algorithm and updated the current internal variables. The consistent tangent stiffness matrix was deduced to improve The equilibrium iteration efficiency of the finite element program was simulated. The numerical simulation was carried out for various loading conditions of 63Sn-37Pb solder alloy. The numerical simulation results after the transplantation and the verified numerical simulation results show that the finite element method Is a reasonable and successful. Finally, as an example of the application, the finite element simulation of the shear structure specimen of the material under cyclic loading is carried out.