Visual simulation of fatigue crack growth

被引：0

作者：

Wang, Shuanzhu ^{[1
]}

Margolin, Harold ^{[1
]}

Lin, Feng-Bao ^{[1
]}

机构：

[1] York Coll, Jamaica, United States

来源：

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science | 1998年 / 29 A卷 / 07期

关键词：

Computer simulation - Ductility - Fatigue of materials - Load testing - Strain;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

An attempt has been made to visually simulate fatigue crack propagation from a precrack. An integrated program was developed for this purpose. The crack-tip shape was determined at four load positions in the first load cycle. The final shape was a blunt front with an `ear' profile at the precrack tip. A more general model, schematically illustrating the mechanism of fatigue crack growth and striation formation in a ductile material, was proposed based on this simulation. According to the present model, fatigue crack growth is an intermittent process; cyclic plastic shear strain is the driving force applied to both state I and II crack growth. No fracture mode transition occurs between the two stages in the present study. The crack growth direction alternates, moving up and down successively, producing fatigue striations. A brief examination has been made of the crack growth path in a ductile two-phase material.

引用

页码：1923 / 1931