A weight function method for multiaxial low-cycle fatigue life prediction under variable amplitude loading

作者：Wang, Xiao-Wei; Shang, De-Guang^*; Sun, Yu-Juan

来源：The Journal of Strain Analysis for Engineering Design, 2018, 53(4): 197-209.

DOI：10.1177/0309324718763671

• Critical plane approach
• life prediction
• multiaxial low-cycle fatigue
• variable amplitude loading
• weight function method

A weight function method based on strain parameters is proposed to determine the critical plane in low-cycle fatigue region under both constant and variable amplitude tension-torsion loadings. The critical plane is defined by the weighted mean maximum absolute shear strain plane. Combined with the critical plane determined by the proposed method, strain-based fatigue life prediction models and Wang-Brown's multiaxial cycle counting method are employed to predict the fatigue life. The experimental critical plane orientation and fatigue life data under constant and variable amplitude tension-torsion loadings are used to verify the proposed method. The results show that the proposed method is appropriate to determine the critical plane under both constant and variable amplitude loadings.

• 出版日期2018-5
• 单位北京工业大学