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

剪切流局部化在长度尺度和加载速率层次上的成核和生长

• 批准号: 9522738
• 负责人: Tarek Shawki
• 金额: $ 18.04万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9522738&HistoricalAwards=false
• 关键词: Nucleation; Growth; Shear; Flow; Localization

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. ***

9522738 Shawki这项分析/计算/实验研究将通过剪切流局部化提高对材料损伤和灾难性失效的理解，包括各种加载速率、材料和观测长度尺度。 一个基于能量的框架，以及第二应变梯度的本构关系将被用来决定动态剪切局部化时发生在热敏性和应变率敏感的材料，也工作硬化。 实验阶段将在俄亥俄州州立大学进行，研究空间变形场的演变。 ***