热成形韧性断裂判据的建立及应用

摘要/Abstract

摘要：

针对大锻件设备或配件在热成形过程中产生的裂纹缺陷，采用热力学实验方法，研究了以50＃钢为代表的热裂行为.结果显示：临界断裂应变与变形温度和应变速率呈函数关系.基于热裂行为分析和损伤力学理论，提出了预测裂纹发生的韧性断裂判据.将判据应用于不同变形条件下的镦粗试验，能够较好地预测裂纹发生时所对应的压下量及裂纹产生的位置，并通过嵌入不同判据预测镦粗过程中的开裂.结果表明：所建立判据对于大锻件高温热成形过程的开裂现象具有更高的预测精度.

关键词: 热成形, 韧性断裂判据, 有限元分析, 大锻件

Abstract:

In order to predict occurrence of cracks of heavy forging equipment or accessories during hot forming, the high-temperature fracture behaviors of No. 50 steel were investigated by using the experimental thermodynamic method. The results show that the critical fracture strain is a function of the temperature and strain rate. Based on these results and the theory of damage mechanics, a ductile criterion was proposed, which could predict the occurrence of cracks. Besides, the accuracy of the proposed criterion was verified by conducting upsetting tests with different deformations and the corresponding simulation. Additionally, the applicability of the proposed criterion was investigated by implanting the criterion and various uncoupled criteria into simulation. The result shows that the proposed criterion can best predict the occurrence and location of cracks.

Key words: hot deformation, ductile fracture criterion, finite element analysis, heavy forging

中图分类号:

何建丽，肖艳红，崔振山，陈飞. 热成形韧性断裂判据的建立及应用[J]. 上海交通大学学报（自然版）, 2013, 47(11): 1707-1711.

HE Jianli,XIAO Yanhong,CUI Zhenshan,CHEN Fei. A Novel Ductile Criterion for Hot Forming and Its Applicability[J]. Journal of Shanghai Jiaotong University, 2013, 47(11): 1707-1711.

参考文献

［1］黄建科，董湘怀. 基于细观损伤模型预测金属成形过程中的韧性断裂形式［J］. 上海交通大学学报, 2009, 43(5): 700704.

HUANG Jianke, DONG Xianghuai. Prediction of ductile fracture in metalforming processes based on mesodamage model［J］. Journal Shanghai Jiaotong University, 2009, 43(5): 700704.

［2］Jackiewicz J. Use of a modified Gurson model approach for the simulation of ductile fracture by growth and coalescence of microvoids under low, medium and high stress triaxiality loadings［J］. Eng Fract Mech, 2011, 78(3): 478502.

［3］Xue Z, Pontin M G, Zok F W, et al. Calibration procedures for a computational model of ductile fracture［J］. Eng Fract Mech, 2010, 77(3): 492509.

［4］Cockcroft M G, Latham D J. Ductility and the workability of metals［J］. J Inst Met, 1968, 96: 3339.

［5］Brozzo P, Deluca B, Rendina R. A new method for the prediction of formability limits in metal sheetssheet metal forming and formability［C］// Proceedings of the 7th Biennial Conference of the International Deep Drawing Research Group. Ohio: Metals Park, 1972: 1836.

［6］Lou Y S, Huh H, Lim S L, et al. New ductile fracture criterion for prediction of fracture forming limit diagrams of sheet metals［J］. Int J Solids Struct, 2012, 49(25): 36053615.

［7］McClintock F A. A criterion for ductile fracture by growth of holes［J］. J Appl Mech Trans ASME, 1968, 35: 363371.

［8］Oyane M. Criteria of ductile fracture strain［J］. Bull JSME, 1972, 15(90): 15071513.

［9］Tekoglu C, Leblond J B, Pardoen T. A criterion for the onset of void coalescence under combined tension and shear［J］. J Mech Phys Solids, 2012, 60(7): 13631381.

［10］Alexandrov S, Wang P T, Roadman R E. A fracture criterion of aluminum alloys in hot metal forming［J］. J Mater Process Technol, 2005, 160(2): 257265.

［11］Li H, Fu M W, Lu J, et al. Ductile fractureExperiments and computations［J］. Inter J Plast, 2011, 27(2): 147180.

［12］Kim N H, Oh C S, Kim Y J, et al. Comparison of fracture strain based ductile failure simulation with experimental results［J］. Int J Pres Ves Pip, 2011, 88(10): 434447.

［13］He J L, Cui Z S, Chen F, et al. The new ductile fracture criterion for 30Cr2Ni4MoV ultrasupercritical rotor steel at elevated temperatures［J］. Mater Design, 2013, 52: 547555.

［14］Bhattacharya S S, Satishnarayana G V, Padmanabhan K A. A generic analysis for hightemperature powerlaw deformation: the case of linear ln(strain rate)ln(stress) relationship［J］. J Mater Sci, 1995, 30(23): 58505866.

［15］Nguyen D T, Park J G, Kim Y S. Ductile fracture prediction in rotational incremental forming for magnesium alloy sheets using combined kinematic/isotropic hardening model［J］. Metall Mater Trans, A, 2010, 41(8): 19831994.

［16］Xiao X. On the measurement of true fracture strain of thermoplastics materials［J］. Polym Test, 2008, 27(3): 284295.

［17］Zhang X, Zeng W, Shu Y, et al. Fracture criterion for predicting surface cracking of Ti40 alloy in hot forming processes［J］. T Nonferr Metal Soc China, 2009, 19(2): 267271.

［18］Maropoulos S, Ridley N. Inclusions and fracture characteristics of HSLA steel forgings［J］. Mater Sci Eng, A, 2004, 384(12): 6469.

[1]	齐建雄, 高瀚, 雷宇, 楚飞, 赵春晖. 液压直驱式修井顶驱整机结构设计[J]. 海洋工程装备与技术, 2022, 9(2): 14-16.
[2]	贾米芝, 徐澧明, 林楠, 南博华, 王坤, 蔡登安, 周光明. 具有回弹复位功能易裂盖的结构设计及力学性能研究[J]. 空天防御, 2022, 5(2): 8-16.
[3]	安庆升, 孙立东, 武秋生. 碳纤维增强复合材料发射筒设计研究[J]. 空天防御, 2021, 4(2): 13-.
[4]	张聪, 贾德君, 李范春, 徐一通, 张源. 面向3D打印的钛合金点阵接骨板设计及其仿真[J]. 上海交通大学学报, 2021, 55(2): 170-178.
[5]	王威，王珉，胡俊聪，鲍益东，金霞，陈文亮. 面向汽车覆盖件的有限元仿真虚拟匹配方法[J]. 上海交通大学学报, 2020, 54(5): 532-543.
[6]	王东伟，刘明星，吴霄，杨睿，代俊安. 电子机柜瞬时冲击的动力学行为[J]. 上海交通大学学报, 2019, 53(Sup.1): 109-117.
[7]	马志强，楼云锋，李俊杰，金先龙. 基于多重节点的结构动力学显式异步长并行计算方法[J]. 上海交通大学学报, 2019, 53(9): 1100-1106.
[8]	沈洁，张延松. 三层钢板胶焊熔核形成过程的有限元分析[J]. 上海交通大学学报, 2019, 53(6): 726-733.
[9]	李昱霖, 安庆升, 杨坤好, 唐晓峰, 刘龙涛. 防热承载一体化复合材料电缆罩分析及验证[J]. 空天防御, 2019, 2(3): 1-7.
[10]	李东玮, 王磊, 张聪, 赵亦希. 预折刀工作终止位置对包边边界缩进的影响[J]. 上海交通大学学报, 2019, 53(1): 100-104.
[11]	王冬石, 张希, 蒋爱国, 范赞. 基于ANSYS的深海信标O形密封圈的密封性能研究[J]. 海洋工程装备与技术, 2018, 5(增刊): 128-135.
[12]	莫继良，王东伟，李建熹，李贞，朱旻昊，周仲荣. 摩擦热对界面磨损及制动系统稳定性的影响[J]. 上海交通大学学报（自然版）, 2018, 52(5): 624-630.
[13]	唐睿1,2，胡成亮1，赵震1. 一种考虑侧接触切向滑动的微凸体弹塑性变形传热模型[J]. 上海交通大学学报（自然版）, 2017, 51(5): 520-.
[14]	李华祥. 疲劳谱分析方法及其在立柱式平台结构分析中的应用[J]. 海洋工程装备与技术, 2016, 3(6): 338-345.
[15]	李华祥. 基于一体化集成软件系统的海洋立柱式平台总体结构强度分析[J]. 海洋工程装备与技术, 2016, 3(5): 269-280.