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首页> 外文会议>International conference on advances in product development and reliability >Fatigue Crack Growth Rate of 16mnr Steel with Effect of Stress Ratio
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Fatigue Crack Growth Rate of 16mnr Steel with Effect of Stress Ratio

机译：16MnR钢的疲劳裂纹生长速率，应力比效果

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摘要

Fatigue crack growth was simulated by using a newly developed unified model on the fatigue initiation and crack growth based on an incremental multiaxial fatigue criterion. The cyclic elastic-plastic stress-strain field was analyzed using the general-purpose finite element software (ABAQUS) with the implementation of a robust cyclic plasticity theory. The fatigue crack growth rates with respect to three different stress ratios were selected as the benchmark to check the unified model. The predicted results agreed with the experimental data very well. The insensitivity of the crack growth rate to the stress ratio is due to the fast mean stress relaxation.
机译：通过使用基于增量多轴疲劳标准的疲劳起始和裂纹生长来模拟疲劳裂纹生长。使用通用有限元软件（ABAQUS）分析循环弹塑性应力 - 应变场，实现了鲁棒循环可塑性理论。选择相对于三种不同应力比率的疲劳裂纹生长速率作为检查统一模型的基准。预测结果同意了实验数据。裂缝生长速率对应力比的不敏感是由于快速平均应力松弛。

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