# A variable strain hardening model for anisotropic sheet metals

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3,426 citations

### "A variable strain hardening model f..." refers background or methods or result in this paper

...The Hill48 criterion for plane stress condition is given as 2f sij =F syy 2 +G sxxð Þ2 +H sxx syy 2 +2Nt2xy =1 ð1Þ where F, G, H and N are material constants....

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...In the case of the transverse direction, the predictions of both Hill48 and Barlat89 were similar (for yield stress and n) and hence the error function for both the criteria yielded the same value....

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...The anisotropic effect on the variation of n is demonstrated using Hill (referred to as Hill48) and Barlat and Lian (referred to as Barlat89) criteria....

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...It is observed that the error function for variation of yield stress using the Hill48 criterion is close to unity along the diagonal (u=45) and hence is more accurate than the prediction by Barlat89 criterion....

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...Barlat89 criterion is used for the prediction, as Kuwabara et al. concluded that the Hosford yield criterion (Barlat89 is a generalization of Hosford criterion) fits the experimental data better than the Hill48 criterion....

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1,814 citations

### "A variable strain hardening model f..." refers background in this paper

...However, it is proven that irrespective of the initial strain ratio, the failure of sheet metals is preceded by plane strain mode deformation.(35) Hence the proposed model is not suitable to predict the yield locus shape close to necking....

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1,083 citations

522 citations

### "A variable strain hardening model f..." refers methods in this paper

...The anisotropy due to the texture effect can be quantified experimentally using X-ray Pole figure analysis and other techniques.(4,5) The influence of anisotropy on the yield strength (initiation of plastic deformation) can be modelled directly from experimental data....

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373 citations