Abstract
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.
The material in this three-part paper was presented orally in Session II under the title “Constitutive Relations for Sheet Metal” and Session IV inder the title “Sheet Necking: Influence of Constitutive Theory and Strain-Rate Dependence”
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References
J. W. Hutchinson and K. W. Neale, Acta Met., 25 (1977), 839.
A. K. Ghosh, J. Eng. Mater. Technol. (Trans. ASME, H), 99 (1977), 264.
A. K. Ghosh, Research Publication GMR-2323, General Motors Research Laboratories, Warren, Mich. (1977).
Z. Marciniak, K. Kuczynski and T. Pokora, Int. J. Mech. Sci., 15 (1973), 789.
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© 1978 Plenum Press, New York
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Hutchinson, J.W., Neale, K.W. (1978). Sheet Necking-III. Strain-Rate Effects. In: Koistinen, D.P., Wang, NM. (eds) Mechanics of Sheet Metal Forming. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2880-3_11
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DOI: https://doi.org/10.1007/978-1-4613-2880-3_11
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-2882-7
Online ISBN: 978-1-4613-2880-3
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