CAREER: Plasticity of Thin Metallic Sheets

职业：金属薄板的塑性

• 批准号: 9733797
• 负责人: Wei Tong
• 金额: $ 26万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9733797&HistoricalAwards=false
• 关键词: CAREER; Plasticity; Thin; Metallic; Sheets

A theoretical and experimental approach towards a more physically based modeling of plastic deformation of thin sheets is developed. A suitable representation of spatial homogeneities of materials microstructure, surface topography, and plastic deformation properties of rolled aluminum sheet metals in terms of grain clusters is developed. Theoretical and experimental research of polycrystal plasticity models of the grain clusters based on crystal plasticity theories of single crystalline grains is performed. Experimental investigation and finite element analysis on the evolution of surface finish and formability of aluminum sheet metals undergoing in-plane stretch operation is conducted. These developments lead to a better die design and processing parameters.

发展了一种更基于物理的薄板塑性变形模型的理论和实验方法。建立了轧制铝板材微观组织、表面形貌和塑性变形性能空间均匀性的晶团表示方法。以单晶晶体塑性理论为基础，对晶团多晶塑性模型进行了理论和实验研究。对铝合金板材面内拉伸过程中表面光洁度和成形性的演变进行了实验研究和有限元分析。这些发展导致了更好的模具设计和工艺参数。