Deformation and fracture behavior of several formable automotive aluminum alloys and steels have been assessed experimentally at room temperature through standard uniaxial tension, plane strain tension, and hemispherical dome tests. These materials exhibit the same deformation sequence: normally uniform elongation followed by diffuse necking, then localized necking in the form of crossed intense-shear bands, and finally fracture. The difference among these alloys lies primarily with respect to the point at which damage (i.e., voiding) starts. Damage develops earlier in the steel samples, although in all cases very little damage is observed prior to the onset of shear instability. A unified finite element model has been developed to reproduce this characteristic deformation sequence. Instability is triggered by the introduction of microstructural inhomogeneities rather than through the commonly utilized Gurson-Tvergaard-Needleman damage model. The predicted specimen shape change, shear band characteristics, distribution of strain, and the fracture modes for steels and aluminum alloys are all in good agreement with the experimental observations.
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November 2007
Research Papers
A Unified Finite Element Approach for the Study of Postyielding Deformation Behavior of Formable Sheet Materials
Xinjian Duan,
Xinjian Duan
Department of Materials Science and Engineering,
McMaster University
, 1280 Main Street West, Hamilton L8S 4L7, Canada
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Mukesh Jain,
Mukesh Jain
Department of Mechanical Engineering,
McMaster University
, 1280 Main Street West, Hamilton L8S 4L7, Canada
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Don. R. Metzger,
Don. R. Metzger
Department of Mechanical Engineering,
McMaster University
, 1280 Main Street West, Hamilton L8S 4L7, Canada
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David S. Wilkinson
David S. Wilkinson
Department of Materials Science and Engineering,
McMaster University
, 1280 Main Street West, Hamilton L8S 4L7, Canada
Search for other works by this author on:
Xinjian Duan
Department of Materials Science and Engineering,
McMaster University
, 1280 Main Street West, Hamilton L8S 4L7, Canada
Mukesh Jain
Department of Mechanical Engineering,
McMaster University
, 1280 Main Street West, Hamilton L8S 4L7, Canada
Don. R. Metzger
Department of Mechanical Engineering,
McMaster University
, 1280 Main Street West, Hamilton L8S 4L7, Canada
David S. Wilkinson
Department of Materials Science and Engineering,
McMaster University
, 1280 Main Street West, Hamilton L8S 4L7, CanadaJ. Pressure Vessel Technol. Nov 2007, 129(4): 689-697 (9 pages)
Published Online: October 17, 2006
Article history
Received:
April 18, 2006
Revised:
October 17, 2006
Citation
Duan, X., Jain, M., Metzger, D. R., and Wilkinson, D. S. (October 17, 2006). "A Unified Finite Element Approach for the Study of Postyielding Deformation Behavior of Formable Sheet Materials." ASME. J. Pressure Vessel Technol. November 2007; 129(4): 689–697. https://doi.org/10.1115/1.2767360
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