Fatigue crack growth assessment of 2024-T3 aluminum alloy is carried out on the basis of a recently developed peridynamic fatigue model. The governing remaining-life equation of the peridynamic fatigue model has been solved by two different approaches i.e. numerical and analytical approaches to perform fatigue-crack growth simulations for 2024-T3 aluminum specimen with a pre-existing crack. Remaining-life parameters of the numerical and analytical solution approaches are determined by calibrating with the experimental crack growth data. Fatigue crack growth predictions, and associated material deformation of the specimen under various loading conditions are simulated by the two approaches. Predicted results show that the numerical approach has shortcomings in accurate predictions of crack growth rates for the application of different loading conditions, while the analytical approach can be applied for a wide range of loading conditions with good prediction accuracy and stable simulations of the material deformation with a growing crack. Furthermore, it is found that the computational time of the analytical approach is considerably shorter in comparison with the numerical approach.

2024-T3铝合金的疲劳裂纹扩展评估是在最近开发的近场动力学疲劳模型的基础上进行的。近场动力学疲劳模型的控制剩余寿命方程已通过两种不同的方法求解，即对具有预先存在裂纹的 2024-T3 铝试样进行疲劳裂纹扩展模拟的数值方法和解析方法。数值解法和解析解法的剩余寿命参数是通过用实验裂纹扩展数据校准来确定的。疲劳裂纹扩展预测和试样在各种加载条件下的相关材料变形通过两种方法进行模拟。预测结果表明，数值方法在准确预测不同加载条件下裂纹扩展速率方面存在不足，而解析方法适用于较宽的加载条件，具有良好的预测精度和稳定的材料变形模拟。越来越大的裂缝。此外，发现与数值方法相比，解析方法的计算时间要短得多。