金属薄板循环塑性强化模型及实验研究进展
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摘要
金属薄板塑性成形及回弹预测精度在很大程度上取决于所采用的强化模型能否对材料变形行为准确描述。梳理了各向同性强化模型、随动强化模型、旋转强化模型、畸变强化模型以及各类微观强化模型,对不同模型的特点及局限性进行了分析。同时,总结并讨论了标定强化模型中材料参数的各类循环加载实验方法。针对强化模型参数识别的问题,总结了常用的参数标定方法,分析了影响识别精度的因素。最后,介绍了不同强化模型在回弹预测方面的应用并分析了影响预测精度的因素。
The accuracy of plastic forming and springback prediction of metal sheet greatly depends on whether the hardening model can accurately describe the deformation behavior of the material. The isotropic hardening models, kinematic hardening models, rotational hardening models, distortional hardening models and various microscopic hardening models were summarized, and their characteristics and limitations were analyzed. Various cyclic tests for material parameters in the hardening model were summarized and discussed. Targeted to the parameter identification of hardening model, commonly used parameter identification methods for hardening models were summarized, and the factors affecting the identification accuracy were analyzed. Finally, the application of the hardening model in springback prediction was introduced and the factors affecting the prediction result were analyzed.
The accuracy of plastic forming and springback prediction of metal sheet greatly depends on whether the hardening model can accurately describe the deformation behavior of the material. The isotropic hardening models, kinematic hardening models, rotational hardening models, distortional hardening models and various microscopic hardening models were summarized, and their characteristics and limitations were analyzed. Various cyclic tests for material parameters in the hardening model were summarized and discussed. Targeted to the parameter identification of hardening model, commonly used parameter identification methods for hardening models were summarized, and the factors affecting the identification accuracy were analyzed. Finally, the application of the hardening model in springback prediction was introduced and the factors affecting the prediction result were analyzed.
引文
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[20]YOSHIDA F,UEMORI T.A Model of Large-strain Cyclic Plasticity and Its Application to Springback Simulation[J].International Journal of Mechanical Sciences,2003,45(10):1687-1702.
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