金属塑性损伤力学模型研究进展

Review on development of mechanics model of metal ductile damage

针对金属塑性损伤力学模型进行综述,总结和介绍了连续介质损伤力学模型以及细观损伤力学模型各自的优缺点及应用范围,并简要概括了两种模型的区别。以韧性断裂准则为出发点,总结了包括Kachanov-Rabotnov模型、Bao-Wierzbicki模型以及GTN模型在内的各模型的发展历程,在此期间,应力三轴度和Lode角参数的引入对各模型的发展具有积极的推动作用。在显微观察及有限元仿真等技术的影响下,各模型得到了更加深入的研究。结果表明,连续介质损伤力学模型对微观塑性损伤的预测精度更高、应用范围更广,具有广阔的应用前景。

Metal plastic damage mechanics model was reviewed,the advantages and disadvantages of the continuum damage mechanics model and the meso-damage mechanics model as well as the range of application were summarized and introduced,and the differences between the two models were briefly summarized.Based on the ductile fracture criterion,the development process of each model was summarized,including Kachanov-Rabotnov model,Bao-Wierzbicki model and GTN mode.The introduction of stress triaxiality and Lode angle parameters played a positive role in promoting the development of these models.Combined with microscopic observation and finite element simulation,the study of each model was more in-depth.The research results show that the continuum damage mechanics model has higher predicting accuracy and wider application range for micro-plastic damage,which has broad application prospects.