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将大变形增量问题的Total Lagrangian法应用于三维粘弹性结构的应力分析,推导出以Kirchhoff应力和Green应变表示的增量本构方程,采用20节点等参元计算了内压作用下固体推进剂径向应力与环向应力的瞬时分布,计算结果与文献结果吻合较好。
The Total Lagrangian method with large deformation increment problem is applied to the stress analysis of three-dimensional viscoelastic structures. The incremental constitutive equation is derived with Kirchhoff stress and Green strain. The solid propulsion under internal pressure is calculated using 20-node isoparametric element Agent radial stress and hoop stress instantaneous distribution, the calculated results and the literature results agree well.