Effect of temperature and punch speed on forming limit strains of AA5182 alloy in warm forming and improvement in failure prediction in finite element analysis

Satish DR, Kumar DR, Merklein M (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Journal of Strain Analysis For Engineering Design SAGE Publications (UK and US)

Book Volume: 52

Pages Range: 258-273

Journal Issue: 4

DOI: 10.1177/0309324717704995

Abstract

Formability of AA5182-O aluminum alloy sheets in the warm working temperature range has been studied. Forming limit strains of sheets of two different thicknesses have been determined experimentally in different modes of deformation (biaxial tension, plane strain and tension-compression) by varying temperature and punch speed. A correlation has been established for plane strain intercept of the forming limit diagram (FLD0) with temperature, punch speed and thickness from the experimental results. This correlation has been used to plot the forming limit diagrams for failure prediction in the finite element analysis of warm deep drawing of cylindrical cups. The effect of strain and strain rate on material flow behavior has been incorporated using a strain rate-sensitive power hardening law in which the strain hardening exponent and strain rate sensitivity index have been experimentally determined. The predictions from simulations have been validated by warm deep drawing experiments. Large improvement in accuracy of failure prediction has been observed using the FLDs plotted based on the developed correlation when compared to the existing method of calculating FLD0 using only strain hardening coefficient and thickness. The results clearly indicate the importance of incorporating temperature and punch speed in failure prediction of Al alloys using FLDs in the warm working temperature range.

Authors with CRIS profile

Marion Merklein Institute of Manufacturing Technology

Involved external institutions

Indian Institute of Technology (IIT), Delhi IN India (IN)

How to cite

APA:

Satish, D.R., Kumar, D.R., & Merklein, M. (2017). Effect of temperature and punch speed on forming limit strains of AA5182 alloy in warm forming and improvement in failure prediction in finite element analysis. Journal of Strain Analysis For Engineering Design, 52(4), 258-273. https://dx.doi.org/10.1177/0309324717704995

MLA:

Satish, D. Raja, D. Ravi Kumar, and Marion Merklein. "Effect of temperature and punch speed on forming limit strains of AA5182 alloy in warm forming and improvement in failure prediction in finite element analysis." Journal of Strain Analysis For Engineering Design 52.4 (2017): 258-273.

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