Simulation of Progressive Failure in Solids and Structures

本研究计划解决失效计算的普遍问题，特别强调材料非线性。主要的焦点将放在作为局部剪切带或宏观断裂的移动不连续上。三个主要领域是：发展“移动网格技术”以追踪因材料失效而出现的不连续性的形成；制定和整合在线“交互式图形”；细观力学破坏（材料内部结构的渐进损伤）、宏观断裂（全尺寸原型的开裂）的计算模拟。可靠的失效预测是对新建和现有结构进行准确安全预测的最紧迫问题之一。事实上，诸如最大倒塌荷载和潜在的破坏机制等问题需要稳健的算法来预测。该研究项目将开发必要的算法来解决破坏机制，同时跟踪结构的倒塌。

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.