The bifurcation problem of dynamical formation and growth of cavity in a sphere composed of a power hardening material and a hyper-elastic material is discussed in this paper.
在简单加载条件下，研究幂强化材料和超弹性材料组合球体中的动态孔穴生成和增长问题。
By observing the production of cavities and measuring the growth of cavities, a model explaining the formation of cavity nucleus in superplastic material was given out.
通过观察空洞的产生和测定空洞的长大，提出了一种超塑材料空洞的形核模型。
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