Fundamental Study on Ductile Fracture in Metal Forming

金属成形中延性断裂的基础研究

• 批准号: 8903973
• 负责人: Shyam Samanta
• 金额: $ 2.01万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-01 至 1990-04-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8903973&HistoricalAwards=false
• 关键词: Fundamental; Study; Ductile; Fracture; Metal

This project deals with a scientifically and technically important problem, namely the study on ductile fracture in metal forming processes such as extrusion and forging. The approach in this project is to consider the shape change of voids and the progressive loss of strain hardening capability of the matrix material. Following that argument, a theoretical framework is outlined to estimate the average internal void-matrix configuration of the ductile porous material subjected to arbitrary three-dimensional finite deformation. The development of the theory will be buttressed by an experimental program and incorporating it into a finite element program.

该项目涉及一个具有重要科学和技术意义的问题，即挤压和锻造等金属成形过程中的延性断裂研究。本项目的方法是考虑孔洞的形状变化和基体材料应变硬化能力的逐渐丧失。在此基础上，给出了一个理论框架来估算在任意三维有限变形作用下延性多孔材料的平均内部孔洞矩阵构型。理论的发展将得到实验程序的支持，并将其纳入有限元程序。