前言利用先进的工艺和应力分析手段,进一步挖掘材料潜力,以提高结构的承载能力,是解决结构强度问题的一条重要途径。近来,好些机器零件常采用预应力处理这种先进工艺,即在零件的某些部位建立起反向残余应力,这样工作时的承载能力就大大提高,燃气轮机叶轮的超速工艺处理就属此例。对于这种零件,除了必须进行精确的弹性应力分析外,还必须进 Preface The use of advanced techniques and stress analysis means to further tap the potential of materials to enhance the carrying capacity of the structure is an important way to solve the problem of structural strength. Recently, many machine parts are often prestressed to handle this advanced technology, that is, some parts of the parts to establish the reverse residual stress, so that when carrying capacity is greatly increased, the gas turbine impeller speeding process is the case. For such parts, in addition to accurate elastic stress analysis must be carried out, but also must enter