Some aspects of anisotropic plasticity in sheet metals

Show simple item record Pearce, Roger 2017-08-23T09:15:28Z 2017-08-23T09:15:28Z 1968-03
dc.description.abstract The prediction of the yielding and flow behaviour of materials under complex stress systems from tensile test or other easily determined data has been the aim of engineers for many years. The yield criteria of Tresca and then Mises for isotropic metals are useful, but the realisation that anisotropy is the rule rather than the exception, especially in sheet metals led to the examination of Hill's anisotropic theory by various workers. In the present paper the stress-strain curves of various sheet metals are determined in uniaxial and balanced biaxial tension. As far as yielding behaviour is concerned it is concluded that the theory is reasonably satisfactory for materials where anisotropy is described with r = 1, with certain anomalies for materials with r< 1. As far as flow behaviour is concerned, the theory only applies for materials for r> 1. Crossing of the uniaxial and biaxial curves is observed for certain metals at low strains and this is not predicted by the theory. More work is necessary on low-r materials to resolve these matters. en_UK
dc.language.iso en en_UK
dc.publisher College of Aeronautics en_UK
dc.relation.ispartofseries CoA/N/Mat-15 en_UK
dc.relation.ispartofseries 15 en_UK
dc.title Some aspects of anisotropic plasticity in sheet metals en_UK
dc.type Report en_UK

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