Simulation of Progressive Failure in Solids and Structures

固体和结构中渐进失效的模拟

• 批准号: 8717097
• 负责人: Kaspar Willam
• 金额: $ 19.16万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-05-15 至 1989-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8717097&HistoricalAwards=false
• 关键词: Simulation; Progressive; Failure; Solids; Structures

This research program addresses the prevalent issues of failure computation with particular emphasis on material nonlinearities. The main focus will be on moving discontinuities either as localized shear bands or as macroscopic fractures. Three primary areas are: Development of "Moving Grid Techniques" to trace the formation of discontinuities that emerge from material failure, Formulation and incorporation of on-line "Interactive Graphics", Computational simulation of mesomechanical failure (progressive damage of internal material structure), macroscopic fracture (cracking of a full-scale prototype). Reliable failure predictions are among the most pressing issues related to accurate safety prediction of new and existing structures. In fact, questions such as maximum collapse load and the underlying failure mechanism require robust algorithm to predict. This research project will develop the necessary algorithm to resolve the failure mechanism(s) and at the same time follow the collapse of the structure.

该研究程序解决了失效计算的普遍问题，特别强调材料的非线性。主要的焦点将集中在作为局部剪切带或作为宏观裂隙的移动不连续上。三个主要领域是：开发“移动网格技术”，以跟踪材料破坏后出现的不连续的形成，在线“交互图形”的制定和合并，细观力学破坏(内部材料结构的渐进性损伤)、宏观断裂(全尺寸原型的破裂)的计算模拟。可靠的失效预测是与新结构和现有结构的准确安全预测相关的最紧迫的问题之一。事实上，最大坍塌载荷和潜在失效机制等问题需要稳健的算法来预测。本研究项目将开发必要的算法来解决结构的失效机理(S)，同时跟踪结构的倒塌。