分析选用Solid185模拟无铅焊锡材料之原因除上 述精准外，乃因Solid185具有 总应变 ( Total Strain )和潜变 应变能密度(Creep Strain Energy Density)的计算和數值 输出，可用于计算疲勞寿命。
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作者工作的意义在于揭示了在适当的几何约束下，自组装形成的花样是总应变能最小的结果。
The significance of our work lies in the revelation that, under proper geometrical constraint, the various patterns can develop through minimization of the strain energy.
对于形变理论，假定塑性应变张量与总应变偏量张量成比例，其比例因子是总有效应变的标量函数。
For plastic deformation theory, it is assumed that the plastic strain tensor is proportional to the total strain deviation tensor and the ratio is a sealer 'function of the effective total strain.
以结构的总重量最小和结构的总应变能最大为优化目标，以导管的平均直径和壁厚作为设计变量，考虑强度、刚度和稳定等约束条件。
Total weight and seismic strain energy of the structure were selected to be optimal objectives. Average diameter and wall thickness of the structural element were taken as design variables.
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