Finite Element Study of Near-Tip Field for Growing Cracks

裂纹扩展近尖端场的有限元研究

• 批准号: 8513984
• 负责人: Ting-Leung Sham
• 金额: $ 1.72万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-01-01 至 1987-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8513984&HistoricalAwards=false
• 关键词: Finite; Element; Study; Near; Tip

Access equipment and 100 CPU hours on the Gray XMP/24 at Boeing Computer Services will be obtained and very detailed finite element solutions for plane strain growing cracks will be generated. The computations will determine the evolution of the near-tip stress and deformation fields during stable crack growth and estimate its functional dependence on the crack growth history. Crack growth simulations will be performed for a deeply cracked bend geometry under conditions which progress from small scale to large scale, including yielding. Accurate numerical description of the near-tip fields will be sought for different judiciously chosen load versus crack length histories. The overall goal is to utilize these results on ductile crack growth equations and verify them with experimental results.

波音公司Gray XMP/24上的访问设备和100个CPU小时 计算机服务将获得非常详细的有限元 将产生平面应变扩展裂纹的解。 的 计算将确定近尖端应力的演变， 裂纹稳定扩展过程中的变形场并估计其 裂纹扩展历史的函数依赖性。 裂纹扩展 模拟将在以下条件下对深度开裂的弯曲几何形状进行 从小规模发展到大规模的条件，包括 屈服 近尖端场的精确数值描述将 寻求不同的明智选择的负载与裂纹长度 历史 总体目标是利用这些结果对延性 裂纹扩展方程，并用实验结果进行验证。