Nucleation and Growth of Shear Flow Localization Over a Hierarchy of Length Scales and Loading Rates

9522738 Shawki这项分析/计算/实验研究将通过在广泛的加载速率、材料和观察长度范围内的剪切流局部化来提高对材料损伤和灾难性破坏的理解。基于能量的框架以及本构关系中的第二应变梯度将被用来确定在同样加工硬化的热敏性和应变率敏感型材料中何时发生动态剪切局部化。实验阶段将在俄亥俄州立大学进行，将研究空间形变场的演变。***

9522738 Shawki This analytical/computational/experimental study will improve the understanding of material damage and catastrophic failure through shear flow localization over a wide range of loading rates, materials and observation length scales. An energy based framework as well as second strain gradients in the constitutive relations will be employed in deciding when dynamic shear localization occurs in thermally-sensitive and strain rate-sensitive materials that also work harden. The experimental phase, to be conducted at the Ohio State University, will study the evolution of the spatial deformation field. ***