Based on a new fracture mechanics parameter, this study is concerned with assessment of the lifetime of a cracked aircraft gas turbine engine compressor disk operating under low cyclic loading conditions. In combination with the elastic-plastic properties of the VT3-1 titanium alloy, various combinations of angular velocity, temperature, surface flaw form and size are considered. A lifetime prediction model, which is based on the fracture process zone size and plastic stress intensity factor (SIF), is proposed. The durability of the compressor disk is predicted on the basis of SIF distributions obtained from elastic and plastic crack growth models.

中文翻译：

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基于塑性应力强度因子的裂纹压缩机盘寿命评估

基于新的断裂力学参数，这项研究与评估在低循环载荷条件下运行的破裂飞机燃气涡轮发动机压缩机盘的寿命有关。结合VT3-1钛合金的弹塑性特性，考虑了角速度，温度，表面缺陷形式和尺寸的各种组合。提出了基于断裂过程带尺寸和塑性应力强度因子（SIF）的寿命预测模型。根据从弹性和塑性裂纹扩展模型获得的SIF分布预测压缩机盘的耐用性。