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基于Voce各向同性硬化模型和Armstrong-Frederic随动硬化模型,建立了一个考虑包辛格效应影响的混合硬化模型,并通过CR4钢板的拉压循环实验验证了该混合硬化模型的准确性。将该混合硬化模型引入Stoughton等效拉深筋阻力模型,替换原有的各向同性硬化模型,考虑包辛格效应的影响对该等效拉深筋阻力模型进行了改进。利用专门设计的拉深筋阻力测定装置,针对矩形拉深筋和半圆形拉深筋,分别获取了不同几何结构参数下的拉深筋阻力,经实验验证,改进后的等效拉深筋模型能够有效地提高拉深筋阻力的计算精度。
Based on Voce isotropic hardening model and Armstrong-Frederic follow-up hardening model, a hybrid hardening model considering the influence of Bauschinger effect was established. The accuracy of the hybrid hardening model was verified by the tension-compression cycle test of CR4 steel plate. The hybrid hardening model was introduced into Stoughton’s equivalent drawbead resistance model to replace the original isotropic hardening model, and the equivalent drawbead resistance model was improved considering the influence of Bauschinger effect. With specially designed drawbead resistance measurement device, the drawbead resistance under different geometrical parameters was obtained for the rectangular drawbead and the semicircular drawbead, respectively. The experimental results show that the improved equivalent drawbead The model can effectively improve the calculation accuracy of drawbead resistance.