A variable strain hardening model for anisotropic sheet metals

作者：Hariharan Krishnaswamy^*; Prakash Raghu V

来源：The Journal of Strain Analysis for Engineering Design, 2012, 47(5): 289-296.

DOI：10.1177/0309324712445418

• Anisotropy
• texture
• yield criteria
• strain hardening

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 modelling.

• 出版日期2012-7