ABSTRACT
This chapter introduces new concepts and relationships which make it possible for the design or manufacturing engineer to predict the strength of cold-worked metals. In order to calculate the strength of the material after deformation, and also to predict when failure will occur during deformation, it is necessary to know the magnitude of the strain at all critical locations of the part. The traditional experimental method of determining the strength of a part by testing a prototype is too expensive to be widely used. The strains calculated by this method can be used to predict both the amount of deformation necessary to cause fracture and the resulting strengths after any amount of torsional deformation. The strains calculated by traditional model enable one to predict when failure will occur during shear deformation and also the strength of the material after any amount of shear deformation.
