Strain field prediction for AA6014-T4 in Nakajima test by analytical Poly6-18p yield criterion
The newest analytical Poly6-18p yield criterion considering anisotropic hardening was used to predict the macroscopic mechani-cal evolution of AA6014-T4 material.By comparing with Yld2000-2d yield criterion,it is found that the analytical Poly6-18p yield criteri-on can accurately predict the flow curves of AA6014-T4 material under different loading conditions,while the error of the flow curve under equi-biaxial tension predicted by Yld2000-2d yield criterion considering isotropic hardening is very large.By embedding them into the ABAQUS finite element software,the evolution law of the strain field distribution of the material in the Nakajima test was simulated by nu-merical simulation.The results show that compared with Yld2000-2d yield criterion considering isotropic hardening,the analytical Poly6-18p yield criterion considering anisotropic hardening can more accurately predict the strain field distribution in Nakajima test.
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