U.S.-Brazil: Adaptive Finite Element Methods Applied To Thermal Cyclic Shakedown Problems For Hardening Materials

美国-巴西：自适应有限元方法应用于硬化材料的热循环安定问题

• 批准号: 9402416
• 负责人: J. Tinsley Oden
• 金额: $ 1.69万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9402416&HistoricalAwards=false
• 关键词: U.S.; Brazil; Adaptive; Finite; Element

This U.S.- Brazil Cooperative Science Program award supports travel expenses, computer time and publication costs, related to the visit of J. T. Oden, U. of Texas, Austin to Belo Horizonte, Brazil. Prof. Oden will work on numerical analysis of thermal shakedown problems; his Brazilian counterpart is J. Franco, of the Federal University of Minas Gerais, Belo Horizonte. An important objective in solid mechanics is to determine conditions under which mechanical and structural systems fail. Limit load analysis, particularly shakedown theory of classical plasticity is one of the ways in which these conditions may be determined. The present work involves the development of a new and general theory of failure analysis, extending classical shakedown theories, that focuses on the following: -general material constitutive laws, including possibly non- ductile materials, -upper and lower bounds for limit and shakedown loads,-variable multiple- parameter load factors,-inclusion of the effects of thermal cyclic loading on material behavior, -development of computational schemes to determine bounds on limit and shakedown loads, -development of schemes for numerical error estimations and adaptivity to control the computational process and produce very accurate simulations of failure mechanisms and limit loads, -comparisons with available data, experimental, computational and analytical.

这项美国 - 巴西合作科学计划奖支持旅行费用，计算机时间和出版成本，这与德克萨斯州美国的J. T. Oden，奥斯汀，奥斯汀访问了巴西的Belo Horizo​​nte。 奥登教授将对热率问题进行数值分析； 他的巴西对手是Belo Horizo​​nte联邦Minas Gerais联邦大学的J. Franco。 固体力学的一个重要目标是确定机械和结构系统失败的条件。 极限载荷分析，尤其是经典可塑性理论是确定这些条件的方式之一。 The present work involves the development of a new and general theory of failure analysis, extending classical shakedown theories, that focuses on the following: -general material constitutive laws, including possibly non- ductile materials, -upper and lower bounds for limit and shakedown loads,-variable multiple- parameter load factors,-inclusion of the effects of thermal cyclic loading on material behavior, -development of computational schemes to determine bounds on limit and shakedown载荷， - 用于控制计算过程的数值误差估计的方案的开发以及适应性，并产生非常准确的故障机制模拟和限制载荷， - 具有可用数据，实验性，计算和分析性的comparisons。