Web目前已有很多种用于描述板料各向异性的屈服准则。 1948年，Hill首次将各向异性系数引入屈服准 则，提出了第1个各向异性屈服准则——Hill48屈 WebThe Hill yield criterion developed by Rodney Hill, is one of several yield criteria for describing anisotropic plastic deformations.The earliest version was a straightforward extension of the von Mises yield criterion and had a quadratic form. This model was later generalized by allowing for an exponent m.Variations of these criteria are in wide use for metals, …

基于三维Hill’48屈服准则的液压成形本构模型及数值验证

WebFinite element simulations and experiments for the split-ring test were conducted to investigate the effect of anisotropic constitutive models on the predictive capability of sheet springback. As an alternative to the commonly employed associated flow rule, a non-associated flow rule for Hill1948 yield function was implemented in the simulations. … WebNov 23, 2014 · The mechanical properties of a thin AZ31B Mg alloy sheet (with the thickness of 0.5 mm) were characterized for its anisotropy, temperature-dependent hardening (including its deterioration) and strain rate sensitivity based on simple tension test data measured at 100 °C, 150 °C, 200 °C, 250 °C, respectively, in Part I. As for anisotropy, … laboratory\u0027s lm

Mechanical property of magnesium alloy sheet with hardening

WebSep 17, 2010 · 二、单向应力状态下的屈服准则由单向拉伸实验可知，随着外力的增加材料内的应力也随着增加。. 当应力的数值等于于屈服极限σ就是单向应力状态下的屈服准则， … WebCN110261247A - 金属材料各向异性屈服及硬化本构参数同步表征方法 - Google Patents ... promote subsite to site collection