Plasticity and fracture of martensitic boron steel under plane stress conditions
Name
Mohr-2009-Plasticity and fract.pdf
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2.7 MB
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Adobe PDF
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Author(s)
Mohr, Dirk
Ebnoether, Fabien
Date Issued
October 2009
Journal
International Journal of Solids and Structures
Publisher
Elsevier B.V.
Citation
Mohr, Dirk, and Fabien Ebnoether. “Plasticity and Fracture of Martensitic Boron Steel Under Plane Stress Conditions.” International Journal of Solids and Structures 46, no. 20 (October 2009): 3535–3547. © 2009 Elsevier Ltd.
Version
Final published version
Abstract
Two series of multiaxial experiments are performed to characterize the mechanical behavior of a hot formed martensitic 22MnB5 boron steel. In the first series, flat specimens of uniform cross-section are subjected to various combinations of tensile and shear loading to characterize the elasto-plastic response. Butterfly-shaped specimens of non-uniform cross-section are used for the second series to study the onset of fracture in the martensitic steel. It is found from the analysis of the experimental results that the planar isotropic Hill’48 yield function along with an associated flow rule provides good estimates of the stress–strain response over a wide range of loading paths. The fracture experiments demonstrate that the crack initiation depends strongly on the loading state. A simple stress triaxiality dependent phenomenological fracture model is calibrated to describe the onset of fracture. Using the proposed plasticity and fracture model, numerical simulations of the fracture of tensile specimens of different notch radii are performed and compared with experiments.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
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
https://doi.org/10.1016/j.ijsolstr.2009.05.011
