Finite-Element Simulation of Ductile Fracture in Reduced Section Pull-Plates Using Micromechanics-Based Fracture Models
Publication: Journal of Structural Engineering
Volume 133, Issue 5
Abstract
Micromechanics-based models that capture interactions of stress and strain provide accurate criteria to predict ductile fracture in finite-element simulations of structural steel components. Two such models—the void growth model and the stress modified critical strain model are applied to a series of twelve pull-plate tests that represent reduced (or net) section conditions in bolted and reduced beam section connections. Two steel varieties, A572 Grade 50 and a high-performance Grade 70 bridge steel are investigated. The models are observed to predict fracture much more accurately than basic longitudinal strain criteria, by capturing stress–strain interactions that lead to fracture. The flat stress and strain gradients in these pull plates allow the use of relatively coarse finite-element meshes providing economy of computation while capturing fundamental material behavior and offering insights into localized ductile fracture effects.
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Acknowledgments
This paper is based upon research supported by the National Science Foundation under the U.S. Japan Cooperative Research for Urban Earthquake Disaster Mitigation initiative (Grant No. NSFCMS 9988902). Additional support was provided by the Steel Structures Development Center of the Nippon Steel Corporation (Futtsu, Japan), and by donations of steel material from the Garry Steel Company (Oakland, Calif.) and the ATLSS Engineering Research Center (Bethlehem, Pa.).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 5 • May 2007
Pages: 656 - 664
Copyright
© 2007 ASCE.
History
Received: Jan 17, 2006
Accepted: Oct 19, 2006
Published online: May 1, 2007
Published in print: May 2007
Notes
Note. Associate Editor: James S. Davidson
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