含销钉孔边裂纹的某压气机轮盘裂纹扩展分析

基于三维裂纹扩展分析软件FRANC3D V6.0,结合有限元软件,采用子模型技术建立断裂力学有限元模型.对带孔平板试样的裂纹扩展进行了数值模拟,分析了裂纹扩展规律,计算结果与手册解误差很小,结果表明了分析方法的可行性和准确性.建立了含销钉孔边裂纹的轮盘断裂力学有限元模型,对其进行了三维动态裂纹扩展分析,计算了应力强度因子和裂纹扩展寿命.结果表明:该分析方法简单可行,几种裂纹形式中销钉孔内表面裂纹对轮盘裂纹扩展寿命危害最大. 

Analysis of crack propagation for a compressor disk with cracks on pin holes

Based on the 3-D crack propagation analysis software named FRANC3D V6.0 and a finite element software, a finite element model of fracture mechanics was established by means of sub-model technique. The crack propagation of center hole of rotating plate was simulated. Little deviation of the computing results with the manual solution indicated the feasibility and accuracy of the method. The model was developed to predict the propagation life of disk containing cracks on the pin holes. The 3-D dynamic crack propagation of the model was simulated. The stress intensity factors and the propagation life of the disk were calculated. The analysis method is feasible. The most dangerous crack is on the surface of the pin hole of the disk.