Viscoplastic Modeling of Solid Polymer Inelastic Deformation

0000187为了在结构和制造过程的应力分析中充分利用现有的计算能力，需要有适用于现代材料和加载条件的本构方程。固体聚合物的时间（速率）依赖的机械行为是这个程序的目标。提出了一种实验与理论结合的研究方法。研究和改进了基于超应力修正的固体聚合物非弹性行为增量粘塑性理论。单轴和双轴筛选试验几种市售固体聚合物将导致选择两种聚合物，其本构方程将被开发。

0000187To make full use of the available computing power in stress analyses of structures and of manufacturing processes constitutive equations for modern materials and loading conditions are needed. The time (rate)-dependent mechanical behavior of solid polymers is the target of this program. A combined experimental/theoretical investigation is proposed. The incremental viscoplasticity theory based on overstress (VBO) modified for solid polymer inelastic behavior will be investigated and improved. Uniaxial and biaxial screening tests on several commercially available solid polymers will lead to the selection of two polymers for which a constitutive equation will be developed.