论文部分内容阅读
分析FGH96涡轮盘的尺寸效应,分析了分别适合于FGH96亚尺寸盘和全尺寸盘的低循环疲劳寿命预测方法.成功设计了FGH96亚尺寸盘、全尺寸裂纹扩展盘试验件;通过低循环疲劳试验,展现了两种不同的低循环疲劳失效机理,验证了提出的低循环疲劳寿命预测方法;通过裂纹扩展试验,获得了FGH96全尺寸轮盘的裂纹扩展特性,揭示了FGH96全尺寸涡轮盘与紧凑拉伸试样裂纹扩展特性具有显著差别的客观规律;获得FGH96全尺寸涡轮盘580℃损伤容限值,明确某发动机高压涡轮盘损伤容限水平.
The size effect of the FGH96 turbo disk was analyzed and the method of predicting the low cycle fatigue life of the FGH96 sub-size disc and the full-size disc respectively was analyzed.The FGH96 sub-size disc and the full-size crack extension disc were successfully designed.Through the low cycle fatigue test , Show two different mechanisms of low cycle fatigue failure and verify the proposed method of low cycle fatigue life prediction; through the crack growth test, the crack propagation characteristics of the FGH96 full-size roulette were obtained, revealing that the FGH96 full size turbine disc and the compact Tensile crack propagation characteristics of the specimen have significant differences in the objective law; obtained FGH96 full size turbine disc damage tolerance at 580 ℃, a clear high-pressure turbine disk damage tolerance level.