Abstract
The emergence of instabilities in clad sheet metals subjected to rolling is studied theoretically. These instabilities are modelled as bifurcations from a state of homogeneous strain into periodic non-uniform deformations. With this model, a sharp distinction may be drawn between the instabilities observed in rolling, which are not diffuse, and the diffuse necking observed in uniaxial tension. It is demonstrated that while a maximum load criterion is valid for diffuse necking in uniaxial tension, it is inappropriate for rolling. Various aspects of the predictions made here compare favorably with experiments by Semiatin and Piehler1,2,3
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References
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Steif, P.S. On deformation instabilities in clad metals subjected to rolling. J. Applied Metalworking 4, 317–326 (1987). https://doi.org/10.1007/BF02833942
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DOI: https://doi.org/10.1007/BF02833942