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采用边界元法建立了裂纹扩展分析模型,对FGH95粉末高温合金标准紧凑拉伸(CT)试样的裂纹扩展试验结果进行了数值模拟,计算结果与试验吻合很好,表明分析方法的准确性及可行性.在对粉末高温合金缺陷数据分析的基础上,建立了粉末盘损伤容限边界元分析模型,对其裂纹扩展寿命进行了评估.研究表明:边界元法在损伤容限分析中的实现便捷可行,可应用于复杂构件裂纹扩展特性的工程分析,与传统预测方法相比,能够给出更为合理的寿命结果.
The crack growth analysis model was established by using the boundary element method. The numerical simulation of the crack propagation of the standard compact tensile (CT) specimen of FGH95 powder superalloy was carried out. The calculated results are in good agreement with the experimental results, indicating the accuracy of the analytical method and Feasibility. Based on the analysis of the defect data of the powder superalloy, the boundary element analysis model for the damage margin of the powder disk was established and the crack propagation life was evaluated. The results show that the implementation of the boundary element method in damage tolerance analysis Convenient and feasible, it can be applied to the engineering analysis of the crack propagation characteristics of complex components. Compared with the traditional prediction methods, it can give more reasonable life results.