基于晶体塑性模型的304不锈钢疲劳寿命预测

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摘 要：基于晶体塑性理论生成的多晶体代表性单元，通过模拟拉伸试验获得具有宏观性能的晶体塑性材料参数；采用累积塑性应变作为疲劳指示因子进行疲劳寿命预测。结果表明：通过疲劳指示因子预测的疲劳寿命在试验获得的疲劳寿命的±2倍误差范围之内，模拟结果在可接受范围之内。

关键词：晶体塑性模型；疲劳指示因子；疲劳寿命预测

中图分类号：TH114  文献标志码：B  文章编号：1671-5276（2024）05-0118-04

Fatigue Life Prediction of 304 Stainless Steel Based on Crystal Plasticity Model

Abstract：Based on the polycrystalline representative element generated by the crystal plasticity theory， simulating tensile tests are conducted to obtain the crystalline plastic material parameters with macroscopic properties. Cumulative plastic strain is used as the fatigue indicator parameters to predict the fatigue life. The results show that the fatigue life prediced by the fatigue indictor parameter is within the error range of ±2 times the fatigue life gained by the test， and the simulation result is within the acceptable range.

Keywords：crystal plasticity model；fatigue indicator parameters；fatigue life predication

0 引言

304不锈钢作为一种用途很广的金属材料，广泛应用于航空、航天、机械设备、化工和轻工业等行业。（剩余4149字）