Effects of friction coefficient and shape of impact object on the fatigue life of specimens with impact damage

6th International Conference on Fracture Fatigue and Wear

Zhan, Zhixin^1 ; Hu, Weiping^1 ; Meng, Qingchun^1

School of Aeronautics Science and Engineering, Beihang University, Beijing

100191, China^1

关键词: Coupled effect;    Damage evolution equation;    Damage of materials;    Elastic plastic constitutive equation;    Elastic-Plastic;    Finite element implementation;    Friction coefficients;    Impact process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/843/1/012024/pdf
DOI  :  10.1088/1742-6596/843/1/012024

来源: IOP

【 摘 要 】

This paper proposes a new method based on the continuum damage mechanics to analyse the effects of friction coefficient and shape of impact object on the fatigue life, which considers the impact damage, elastic-plastic damage and coupled effects between the stress field and damage field. Firstly, the impact process is simulated and the initial impact damage is calculated. Secondly, the damage-coupled elastic-plastic constitutive equations and fatigue damage evolution equations are used to calculate the fatigue damage of material. Thirdly, the finite element implementation of theoretical models is conducted to conduct fatigue life calculation. At last, effects of friction coefficient and shape of impact object on the fatigue life are discussed.