LONGITUDINAL AND SHEAR STRAIN DEVELOPMENT IN COLD ROLL FORMING

In this paper we examine strain development during the roll forming pr ocess and particularly the relationship between longitudinal and shear strain. It can be shown that theoretically it is possible for there t o be no longitudinal strain during roll forming (in which case there w ould be shear strain) or no shear strain (in which case there would be longitudinal strain). In actual practice the strain will lie between these two extremes and will comprise both shear and longitudinal strai n. This is seen to be consistent with experimental results.