Prediction of plane strain fracture of AHSS sheets with post-initiation softening
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Li-2010-Prediction of plane.pdf
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1.93 MB
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Author(s)
Li, Yaning
Wierzbicki, Tomasz
Date Issued
May 2010
Journal
International Journal of Solids and Structures
Publisher
Elsevier
Citation
Li, Yaning, and Tomasz Wierzbicki. “Prediction of Plane Strain Fracture of AHSS Sheets with Post-Initiation Softening.” International Journal of Solids and Structures 47, no. 17 (August 2010): 2316–2327. © 2010 Elsevier Ltd.
Version
Final published version
Abstract
In this investigation, the three-parameter Modified Mohr–Coulomb (MMC) fracture model and the determination of the material parameters are briefly described. The formulation of the post-initiation behavior is proposed by defining both the explicit softening law and the incremental damage evolution law. As opposed to the existing attempts to simulate slant fracture with material weakening before crack formation, softening is assumed to occur only in the post-initiation range. The justification of this assumption can be provided by the interrupted fracture tests, for example, Spencer et al. (2002).
Element deletion with a gradual loss of strength is used to simulate crack propagation after fracture initiation. The main emphasis of the paper is the numerical prediction of slant fracture which is almost always observed in thin sheets. For that purpose, VUMAT subroutines of ABAQUS are coded with post-initiation behavior for both shell elements and plane strain elements. Fracture of flat-grooved tensile specimens cut from advanced high strength steel (AHSS) sheets are simulated by 2D plane strain element and shell element models.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1016/j.ijsolstr.2010.04.028
