临界平面法对航空材料的适用性评估分析(英文)

Evaluation of Critical Plane Approaches for Aeronautical Materials

多轴疲劳理论已经被大量的常规材料试验数据所证实,但是它们对航空材料的预测能力还没有进行广泛的验证。利用文献中三类航空材料的多轴疲劳试验数据,评估分析了六种基于临界平面法的多轴疲劳寿命预测模型对它们的预测能力。通过对比分析指出:Ince-Glinka模型最适合预测航空合金钢的疲劳寿命,而对于钛合金以及镍基合金,Brown-Miller模型最能准确预测其疲劳寿命。同时,合理的疲劳寿命预测模型需要全面考虑材料的失效模式及受力特点,而为了准确预测材料的疲劳寿命,则需要选择精确的应变疲劳参数。

Most multi-axial fatigue theories have been widely verified by experimental data of common materials,but not of aeronautical materials. Six typical critical plane models for three typical aeronautical materials using experimental data from the literature are evaluated. Through comparative analysis,the Ince-Glinka model is the best one for aviation alloy steel,while the Brown-Miller model is the best one for titanium and nickel-based alloys.Then indicate that a reasonable fatigue model comprehensively considers the failure mode of material and the stress characteristics. In addition,it needs to choose exact strain fatigue parameters for getting accurate prediction results.