Simulation of Fatigue Life Behavior of Circular Cross-Section Bar with Straight-Fronted Crack

• 作者: Ghader Faraji Hamid Alihosseini Kamran Dehghani
• 来源期刊: 材料科学建模与数值模拟(英文)
• 学科: 医学
• 关键词: SIMULATION FATIGUE Life CRACK SHAPE
• 年，卷（期）: 2014,（3）
• 页码范围: 128-135
• 页数: 8页
• 分类号: R73

摘要

In this paper, fatigue life circular cross-section elastic bar under pure fatigue axial loading is studied through principles of linear elastic fracture mechanics (LEFM) coupled with the three-dimensional finite element technique for determination of critical crack size and residual lifetime. Three different initial notch depths are discussed. The relations between aspect ratio (b/c) and relative crack depth (b/D) are obtained, and it is shown that there is great difference in the growth of cracks with different front shapes and initial notch depths.