Sheet Necking-III. Strain-Rate Effects
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The effect of material strain-rate dependence on necking retardation is examined for biaxially-stretched sheets. Rate-dependent versions of both flow theory and deformation theory are employed in an analysis of the growth of long-wavelength nonuniformities. Material strain-rate sensitivity is seen to substantially increase the predicted limit strains beyond their corresponding values for time-independent material response. We also discuss the influence of strain-rate dependence on imperfection- sensitivity and forming limit curves.
KeywordsUniaxial Tension Deformation Theory Limit Strain Flow Theory Form Limit Curve
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- A. K. Ghosh, Research Publication GMR-2323, General Motors Research Laboratories, Warren, Mich. (1977).Google Scholar