TY - EJOU AU - Li, Lei AU - Yang, Guolai AU - Li, Jiahao TI - Probabilistic Life Calculation Method of NdFeB Based on Brittle Fatigue Damage Model T2 - Computer Modeling in Engineering \& Sciences PY - 2020 VL - 124 IS - 3 SN - 1526-1506 AB - This paper proposes a probabilistic life calculation method of NdFeB based on brittle fatigue damage model. Firstly, Zhu-Wang-Tang (ZWT) constitutive model considering strain rate is established, and based on this, a numerical co-simulation model for NdFeB life calculation is constructed. The life distribution diagram of NdFeB under different stress levels is obtained after simulation. Secondly, a new model of brittle fatigue damage based on brittle damage mechanism is proposed. Then the parameters in the model are identified according to the life distribution diagram of NdFeB and the parameter distribution of the damage evolution model when applied to NdFeB is obtained. Finally, the probability density evolution equation of NdFeB life calculation is established and solved using the probability density evolution method. Probability density function (PDF) of NdFeB life under different stress levels is obtained and provides theoretical basis for the reliability of NdFeB in engineering applications. KW - NdFeB; ZWT constitutive model; fatigue life; brittle damage; probability density evolution DO - 10.32604/cmes.2020.010720