锻压技术

韧性断裂准则参数的3种不同标定方法

英文标题：Three calibration methods for ductile fracture criterion parameters

作者：孟烨晖庄新村赵震

单位：上海交通大学

分类号：TG113.2

出版年,卷(期):页码：2017,42(5):113-118

摘要：

韧性断裂准则可用于金属塑性成形过程中韧性断裂的判据，但预测的准确性依赖于准则参数的有效标定。在目前常用的基于试验与模拟的反求分析法以及曲面拟合法的基础上，给出了一种断裂阈值积分求解的标定方法。利用一系列宽应力三轴度范围内的试验结果，分别采用上述3种标定方法进行了L-H韧性断裂准则的参数求解，并对3种标定方法进行了对比分析，给出了各自的优缺点。由对比结果可知：相比于反求分析法，断裂阈值积分求解的标定方法和曲面拟合法可以改善求解效率；损伤阈值积分求解的标定方法相比于曲面拟合法而言，精度有所提高。

Ductile fracture criterion is generally used to predict ductile fracture in metal forming process, however its accuracy significantly relays on the calibration of parameters. According to the commonly used inverse analysis and surface fitting by experimental and numerical method, a new calibration method based on the integral of fracture threshold value was proposed. Then, from a series of experimental results of the wide range of stress triaxiality and by applying the three calibration methods above, parameters of L-H ductile fracture criterion were solved. Finally, a comparison of the three calibration methods above were performed, and their advantages and disadvantages were given respectively. Contrast to the normal inverse analysis method, the comparison results show that the calibration method of integral of fracture threshold value and surface fitting method can improve computing efficiency. Meanwhile, the new method can provide a more accurate prediction of fracture than the surface fitting method.

基金项目：

国家自然科学基金资助项目（51475296）；东莞市产学研合作项目（2015509124212）

孟烨晖（1993-），男，硕士研究生庄新村（1980-），男，博士，副教授

参考文献：

［1］徐杨，宋仁伯，王宾宁，等. 304HC不锈钢钢丝形变诱导α′-马氏体相变及断裂机制[J]. 塑性工程学报, 2015, 22(4):154-160.Xu Y, Song R B, Wang B N, et al. Study on deformation induced α′-martensitic transformationand fracture mechanism of 304HC stainless steel wire [J]. Journal of Plasticity Engineering, 2015, 22(4): 154-160.
［2］Kanninen M F. Inelastic behavior of solids[J]. Science，1970, 167: 1761-1762.
［3］Bai Y, Wierzbicki T. Application of extended Mohr-Coulomb criterion to ductile fracture[J]. Springer Science, 2010, 161: 1-20.
［4］Zhang Z. A sensitivity analysis of material parameters for the Gurson constitutive model[J]. Fatigue & Fracture of Engineering Materials & Structures, 1996, 19(5): 561-570.
［5］Lou Y, Huh H, Lim S, et al. New ductile fracture criterion for prediction of fracture forming limit diagrams of sheet metals[J]. International Journal of Solids and Structures, 2012, 49: 3605-3615.
［6］Lou Y, Huh H. Prediction of ductile fracture for advanced high strength steel with a new criterion: Experiments and simulation [J]. Journal of Materials Processing Technology, 2013, 213: 1284-1302.
［7］Zhuang X, Wang T, Zhu X, et al. Calibration and application of ductile fracture criterion under non-proportional loading condition[J]. Engineering Fracture Mechanics, 2016, 165: 39-56.
［8］张杰, 阮光明. 基于多目标优化算法的汽车高强钢零件冲压过程优化[J]. 塑性工程学报, 2015, 22(4):67-73.Zhang J, Nguyen Quang-minh. Optimization of stamping process for high strength steel alloy automotive component using a multi-objective genetic algorithm[J]. Journal of Plasticity Engineering, 2015, 22(4): 67-73.
［9］方勇勇，庄新村，赵震，等. 基于试验与模拟的修正GTN模型参数反求分析[J]. 上海交通大学学报，2016，50(7)：1011-1016.Fang Y Y, Zhuang X C, Zhao Z, et al. Parameter identification of enhanced GTN model through experiments and simulation[J]. Journal of Shanghai Jiaotong University, 2016, 50(7):1011-1016.
［10］Bao Y, Wierzbicki T. On fracture locus in the equivalent strain and stress triaxiality space[J]. International Journal of Mechanical Sciences, 2005, 72(7): 1049-1069.

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