MODELING OF CRACK GROWTH ON 16MNR STEEL NOTCHED COMPACT TENSION SPECIMEN

摘要：

Fatigue crack growth was modeled for 16MnR steel notched compact tension specimen on the condition of Mode I cyclic loading with different stress ratios. The crack growth rate is determined by material damage during crack initiation at the notch and crack propagation. In the paper, a new cyclic plasticity model was introduced to describe cyclic stress-strain response near the notch properly, and the stress-strain field around the notch was calculated. Crack growth behavior in notch plastic zone was predicted by using a new multi-axial fatigue criterion to evaluate the fatigue initiation damage and growth damage near the notch. The modeling results are agreed with experimental data. The results show that when stress ratio is 0.1, crack growth rate near the notch accelerates monotonically with the increase of crack length. When stress ratio is equal to -1, crack growth rate near the notch decreases initially and then increases with the increase of crack length.

作者: TU Wenfeng GAO Zengliang WANG Xiaogui

作者单位: Institute of Process Equipment and Control Engineering, Zhejiang University of Technology; The MOE K Institute of Process Equipment and Control Engineering, Zhejiang University of Technology; The MOE K

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）