一、叶片的断裂力学过去的发动机设计,只是从材料力学的观点出发,对其进行强度设计。至于振动、断裂只用加大安全系数的办法来处理。然而发动机的叶片断裂破坏仍然时有发生。究其原因,问题出在材料强度愈高,屈服强度就愈高,材料愈脆,愈容易断裂。加之叶片在制造、安装过程中,不可避免地存在缺陷、裂纹等疵病。例如压气机叶片和涡轮叶片 First, the blade fracture mechanics Past engine design, just from the material mechanics point of view, the strength of its design. As for the vibration, the fracture can only be dealt with by increasing the safety factor. However, the engine blade rupture damage still occur from time to time. The reason, the problem is that the higher the material strength, the higher the yield strength, the more brittle materials, the more easily broken. Coupled with the leaves in the manufacture, installation process, there are inevitable defects, cracks and other flaws. Such as compressor blades and turbine blades