A multiaxial high-cycle fatigue life evaluation model for notched structural components

作者：Liu Xiao Yong^*; Su Tie Xiong; Zhang Yi; Yuan Mei Ni

来源：International Journal of Fatigue, 2015, 80: 443-448.

DOI：10.1016/j.ijfatigue.2015.07.010

• Multiaxial fatigue
• Life evaluation
• Notched structural components
• Critical plane
• Critical distances

A model for multiaxial high-cycle fatigue life evaluation of notched structural components is proposed, which considers the impact of the stress field on fatigue life by utilizing the Theory of Critical Distances (TCD) and Finite Element Method (FEM). The maximum shear stress range plane is defined as the critical plane, and the damage parameters are the maximum effective shear stress amplitude and the maximum effective normal stress, which are obtained by averaging the stress in the hemisphere volume around the maximum stress point. To validate the accuracy of the model, multiaxial fatigue tests are carried out for both smooth and notched specimens of Aluminum-Silicon alloy. The results indicate that the evaluated life and experimental life have a good agreement.

• 出版日期2015-11
• 单位中北大学