J. Phys. III France
Volume 2, Numéro 11, November 1992
Page(s) 2239 - 2246
DOI: 10.1051/jp3:1992243
J. Phys. III France 2 (1992) 2239-2246

Dynamic ductile fracture of a low-strength steel

H. Couque1, R. J. Dexter2, C. P. Leung1 and S. J. Hudak Jr.1

1  Southwest Research Institute, 6220 Culebra Road, San Antonio, Texas 78228-0510, U.S.A.
2  Advance Technology for Large Structural Systmes, Lehigh University, 117 ATL55 Dr., Bethlehem, PA 18015, U.S.A.

(Received 7 October 1991, revised 9 July 1992, accepted 15 July 1992)

The upper-shelf dynamic fracture properties of a low-strength high-toughness steel, A533 Grade B Class 1, have been investigated with a coupled pressure bars techniques, using small compact specimens. Toughness data were generated from numerical simulations with a dynamic viscoplastic finite-element fracture code. The dynamic ductile fracture process was found to involve a larger critical microstructural distance than that associated with quasi-static loading conditions.

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