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目前许多人对地壳和地幔的演化过程和应力的弹性以及粘弹性数字模拟,应用有限单元法进行分析(Neugebauer,Britmager,1975;Toksz et al.,1973)。虽然对弹性分析技术已有很好了解,但对于粘弹性分析,特别是涉及到大应变时,就不是这种状况了。在多数情况下,完全没有考虑每个时段开始时的初始应力效应,并且从弹性模型到粘弹性模型,虽然两个过程相似,也必须重新编写计算机程序。修正材料性质矩阵 D 是一个较容易的方法,从而允许有粘性松驰,然后通过调整节点
Many people nowadays analyze the evolution of elasticity and viscoelasticity of the crust and mantle, using the finite element method (Neugebauer, Britmager, 1975; Toksz et al., 1973). Although elastic analysis techniques are well understood, this is not the case for viscoelastic analysis, especially when large strains are involved. In most cases, the initial stress effect at the beginning of each period was not considered at all, and from the elastic model to the viscoelastic model, although the two processes are similar, computer programs must be rewritten. Modifying the material property matrix D is an easier method that allows for a viscous relaxation and then adjusts the nodes