Journal ArticleDOI
A variable strain hardening model for anisotropic sheet metals
TLDR
In this article, a phenomenological approach is proposed to model the influence of texture-induced anisotropy in the variation of strain hardening characteristics of a sheet material, and the results showed that a variable strain-hardening exponent provided greater accuracy of numerical prediction than the existing isotropic model.Abstract:
A phenomenological approach is proposed to model the influence of texture-induced anisotropy in the variation of strain hardening characteristics of a sheet material The variation of uniaxial strain hardening exponent with rolling direction is modelled using existing anisotropic yield criteria assuming power law strain hardening behaviour The model is extended to the biaxial region to predict the effective strain hardening exponent with the assumption of constant plastic work The prediction of both uniaxial and biaxial strain hardening is compared with the experimental data available in the literature It is observed that a variable strain hardening exponent provided greater accuracy of numerical prediction than the existing isotropic model The accuracy of the proposed model is dependent on the yield criteria and the flow rule used for the modellingread more
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Journal ArticleDOI
Improved predictability of forming limit curves through microstructural inputs
TL;DR: In this paper, a limit curve was determined experimentally through limiting dome height (LDH) tests in AA1050, AISI 316L and 304L, and the implicit assumption that n scales with misorientation developments and formation of strain induced martensite.
Book ChapterDOI
Constitutive Modeling for Metals
Frédéric Barlat,Frédéric Barlat +1 more
TL;DR: In this paper, the authors review aspects of the plastic behavior common in metals and alloys, including macroscopic and microscopic phenomena occurring during plastic deformation, and present a model of plasticity at both micro-and macro-scales.
Journal ArticleDOI
Influence of Yield Criteria in the Prediction of Strain Distribution and Residual Stress Distribution in Sheet Metal Formability Analysis for a Commercial Steel
TL;DR: In this paper, the authors evaluated the Hill 48 and Barlat 89 yield criteria by simulating the Limiting Dome Height test of the Numisheet 96 benchmark problem for a commercial D-grade steel and the results were validated with experimental data.
Journal ArticleDOI
Forming limit diagram for interstitial free steels supplied by Ford India Motors
TL;DR: In this article, the formability of two sheets namely, interstitial free steel sheet of thickness 0.85 mm coated and noncoated, have been studied and their suitability for forming applications have been examined.
Journal ArticleDOI
Evaluation of yield criteria for forming simulations based on residual stress measurement
TL;DR: In this paper, the residual stresses remaining in a hemispherical cup formed in plain strain mode is predicted using Hill48 and Barlat89 criteria, which are experimentally characterized by using X-Ray diffraction method.