不同应力状态下的高强钢板断裂机理及预测

doi:10.3901/JME.2020.24.072

摘要/Abstract

摘要：

板料成形过程的宏观断裂行为依赖于其微观断裂机理，因此成形过程模拟中的断裂准则的准确选择对于断裂预测具有重要意义。以高强钢TRIP780板料为研究对象，设计从剪切到拉伸应力状态的五种断裂试验，结合宏观拉伸试验和扫描电子显微镜（Scanning electron microscope，SEM）分析研究不同应力状态下TRIP780板料的断裂机理，得到不同应力状态下正应力和切应力与断裂机理的关联关系，引入正应力与切应力的影响构建MMC断裂准则，应用于板料压剪应力区间的断裂行为预测。结果表明，反映断裂机理的MMC准则能适用于板料压剪和拉剪变形应力状态下断裂失效的准确预测。

关键词: 高强钢, 应力状态, 断裂机理, MMC断裂准则, 面内压剪变形

Abstract:

The macroscopic fracture behavior of metal sheet forming process highly depends on microscopic fracture mechanism, thus establishing a ductile fracture criterion reflecting effects of fracture mechanism could ensure high forecast precision of fracture behavior. The forming processes under various stress states of advance high-strength steel TRIP780 sheet is tested and simulated. Five fracture tests ranging from shear to tension stress states are conducted and the parallel numerical simulations are also performed. The scanning electron microscope(SEM) fractographies of fracture surfaces are detected to reveal microscopic fracture mechanism. The normal stress and shear stress are obtained to correct with the evolution rule of fractographies and therefore are deemed as parameters which can describe fracture mechanism. Therefore, MMC fracture criterion is characterized by normal stress and shear stress is adopted and then extended to predict fracture behavior of in-plane compression-shear forming. The results indicate that the MMC fracture criterion reflecting fracture mechanism of TRIP780 sheet could predict fracture of forming processes under wide stress state range covering form compression-shear to tension-shear, which further proves the superiority of calibrated MMC fracture criterion.

Key words: high-strength steel, stress state, fracture mechanism, MMC fracture criterion, in-plane compression-shear forming

中图分类号:

TG30

钱凌云, 纪婉婷, 王小灿, 孙朝阳, 马腾云. 不同应力状态下的高强钢板断裂机理及预测[J]. 机械工程学报, 2020, 56(24): 72-80.

Lingyun QIAN, Wanting JI, Xiaocan WANG, Chaoyang SUN, Tengyun MA. Research on Fracture Mechanism and Prediction of High-strength Steel Sheet under Different Stress States[J]. Journal of Mechanical Engineering, 2020, 56(24): 72-80.

图/表 13

图1

图2

表1

图3

图4

图5

图6

图7

图8

图9

图10

图11

图12

参考文献 22

1	LI Shuhui ; HE Ji ; GU Bin ; et al Anisotropic fracture of advanced high strength steel sheets: Experiment and theory International Journal of Plasticity 2018, 95- 118.
2	LOU Yanshan ; YOON J W ; HUH H ; et al Correlation of the maximum shear stress with micro-mechanisms of ductile fracture for metals with high strength-to-weight ratio International Journal of Mechanical Sciences 2018, 146-147, 583- 601. doi: 10.1016/j.ijmecsci.2018.03.025
3	LI Yaning ; LUO Meng ; GERLACH J ; et al Prediction of shear-induced fracture in sheet metal forming Journal of Materials Processing Technology 2010, 210 (14), 1858- 1869. doi: 10.1016/j.jmatprotec.2010.06.021
4	夏琴香; 周立奎; 肖刚锋; 等. 金属剪切旋压成形时的韧性断裂准则机械工程学报, 2018, 54 (14), 66- 73.
	XIA Qinxiang ; ZHOU Likui ; XIAO Gangfeng ; et al Ductile fracture criterion for metal shear spinning Journal of Mechanical Engineering 2018, 54 (14), 66- 73.
5	吴彦骏; 庄新村; 赵震. 不同应力状态下45钢断口形貌分析塑性工程学报, 2013, 20 (3), 106- 110. doi: 10.3969/j.issn.1007-2012.2013.03.020
	WU Yanjun ; ZHUANG Xincun ; ZHAO Zhen Fracture topography analysis of C45 steel under different stress state Journal of Plasticity Engineering 2013, 20 (3), 106- 110. doi: 10.3969/j.issn.1007-2012.2013.03.020
6	PAN Hongchen ; WANG Fenghua ; JIN Li ; et al Mechanical behavior and microstructure evolution of a rolled magnesium alloy az31b under low stress triaxiality Journal of Materials Science & Technology 2016, 32 (12), 1282- 1288.
7	LI Heng ; FU Mingwang ; LU Jiatian ; et al Ductile fracture: Experiments and computations International Journal of Plasticity 2011, 27 (2), 147- 180. doi: 10.1016/j.ijplas.2010.04.001
8	HU Xiaohua ; WILKINSON D S ; JAIN M ; et al The influence of particle shape, volume fraction and distribution on post-necking deformation and fracture in uniaxial tension of AA5754 sheet materials International Journal of Solids and Structures 2009, 46 (13), 2650- 2658. doi: 10.1016/j.ijsolstr.2009.02.012
9	MOHR D ; MARCADET S Micromechanically-motivated phenomenological Hosford-Coulomb model for predicting ductile fracture initiation at low stress triaxialities International Journal of Solids and Structures 2015, 67-18, 40- 55.
10	WIERZBICKI T ; BAO Y ; LEE Y ; et al Calibration and evaluation of seven fracture models International Journal of Mechanical Sciences 2005, 47 (4), 719- 743.
11	黄建科; 董湘怀. 金属成形中韧性断裂准则的细观损伤力学研究进展上海交通大学学报, 2006, (10), 1748- 1753, 1757. doi: 10.3321/j.issn:1006-2467.2006.10.027
	HUANG Jianke ; DONG Xianghuai Research progress of meso-damage mechanics for ductile fracture criterion in metal forming Journal of Shanghai Jiao Tong University 2006, (10), 1748- 1753, 1757. doi: 10.3321/j.issn:1006-2467.2006.10.027
12	TENG Bugang ; WANG Weinian ; XU Yongchao ; et al Ductile fracture prediction in aluminum alloy 5A06 sheet forming based on GTN damage model Engineering Fracture Mechanics 2017, 186, 242- 254. doi: 10.1016/j.engfracmech.2017.10.014
13	XUE Liang Constitutive modeling of void shearing effect in ductile fracture of porous materials Engineering Fracture Mechanics 2008, 75 (11), 3343- 3366. doi: 10.1016/j.engfracmech.2007.07.022
14	MALCHER L ; ANDRADE PIRES F M ; CÉSAR DE SÁ J M A An extended GTN model for ductile fracture under high and low stress triaxiality International Journal of Plasticity 2014, 54 (2), 193- 228.
15	BAI Yuanli ; WIERZBICKI T Application of extended Mohr-Coulomb criterion to ductile fracture International Journal of Fracture 2010, 161 (1), 1- 20. doi: 10.1007/s10704-009-9422-8
16	LOU Yanshan ; HUH H ; LIM S J ; et al New ductile fracture criterion for prediction of fracture forming limit diagrams of sheet metals International Journal of Solids and Structures 2012, 49 (25), 3605- 3615. doi: 10.1016/j.ijsolstr.2012.02.016
17	PARK N ; HUH H ; LIM S J ; et al Fracture-based forming limit criteria for anisotropic materials in sheet metal forming International Journal of Plasticity 2016, 1- 35.
18	杨卓云; 赵长财; 董国疆; 等. 基于Lou-2013韧性断裂准则5182铝板成形极限研究机械工程学报, 2019, 55 (16), 47- 57.
	YANG Zhuoyun ; ZHAO Changcai ; DONG Guojiang ; et al Forming limit research of 5182 aluminum alloy sheet based on Lou-2013 ductile fracture criterion Journal of Mechanical Engineering 2019, 55 (16), 47- 57.
19	QIAN Lingyun ; FANG Gang ; ZENG Pan ; et al Modeling of the ductile fracture during the sheet forming of aluminum alloy considering non-associated constitutive characteristic International Journal of Mechanical Sciences 2017, 126, 55- 66. doi: 10.1016/j.ijmecsci.2017.03.013
20	BRUNIG M ; GERKE S ; SCHMIDT M ; et al Damage and failure at negative stress triaxialities: Experiments, modeling and numerical simulations International Journal of Plasticity 2017, 102, 70- 82.
21	PETR K ; FRANTISEK S ; JIRI H ; et al Calibration of ductile fracture criteria at negative stress triaxiality International Journal of Mechanical Sciences 2016, 108-109 (45), 90- 103.
22	GERKE S ; ZISTL M ; BHARDWAJ A ; et al Experiments with the X0-specimen on the effect of non-proportional loading paths on damage and fracture mechanisms in aluminum alloys International Journal of Solids and Structures 2019, 163, 157- 169. doi: 10.1016/j.ijsolstr.2019.01.007

A/MPa	ε₀	n	σ₀/MPa	Q/MPa	β	α
1 530.77	0.001	0.36	137.93	515.41	30.72	0.42

[1]	张超华, 王晓霞, 常茂椿, 王虎, 叶延洪, 邓德安. 焊缝金属的屈服强度和材料的加工硬化对Q345钢焊接残余应力与变形计算精度的影响[J]. 机械工程学报, 2021, 57(10): 160-168.
[2]	韩锐波, 王红阳, 杨帆, 刘黎明, 祝美丽. 铝合金与高强钢激光-电弧焊铆复合连接机制研究[J]. 机械工程学报, 2020, 56(6): 57-64.
[3]	魏文杰, 何晓聪, 张先炼, 卢嘉伟. DP780/AA6061薄板自冲铆接头微动损伤特性[J]. 机械工程学报, 2020, 56(6): 169-175.
[4]	窦伟元, 张乐乐, 张海峰, 刘长青. 基于刚柔耦合动力学模型的高速列车铸铝横梁应力状态分析[J]. 机械工程学报, 2020, 56(2): 138-144.
[5]	邓云飞, 张永, 曾宪智, 杨永刚. 6061-T651铝合金动态力学性能及断裂准则修正[J]. 机械工程学报, 2020, 56(18): 81-91.
[6]	谢延敏, 张飞, 王子豪, 黄仁勇, 杨俊峰, 胡云川. 基于渐变凹模圆角半径的高强钢扭曲回弹补偿[J]. 机械工程学报, 2019, 55(2): 91-97.
[7]	韩飞, 李荣健. 超高强钢多道次辊弯成形回弹规律研究[J]. 机械工程学报, 2019, 55(2): 73-81.
[8]	梁宾, 赵岩, 赵清江, 范体强, 李阳. 基于Gissmo失效模型的6016铝合金板材断裂行为研究及应用[J]. 机械工程学报, 2019, 55(18): 53-62.
[9]	杨才定, 刘烨. 共析钢在冷轧过程中的组织演变和强化机制[J]. 机械工程学报, 2018, 54(16): 86-92.
[10]	范沁红, 张洪, 姜雪程. 挖掘机工作臂高强度钢板的矫直理论与试验研究[J]. 机械工程学报, 2017, 53(8): 82-90.
[11]	岑耀东, 陈芙蓉. TRIP980高强钢/SPCC低碳钢的异种钢电阻点焊工艺优化及接头性能分析[J]. 机械工程学报, 2017, 53(8): 91-98.
[12]	庄蔚敏, 赵文增, 解东旋, 李兵. 22MnB5高强钢/7075铝合金热铆接冷模具淬火无铆钉铆接研究[J]. 机械工程学报, 2017, 53(20): 106-112.
[13]	彭艳, 刘才溢, 郝露菡, 邢鹏达. 性能梯度分布热成形技术研究进展[J]. 机械工程学报, 2016, 52(8): 67-75.
[14]	王海波, 万敏, 李强, 吴向东, 翟京. TRIP590先进高强钢板的双向加载变形行为[J]. 机械工程学报, 2016, 52(6): 46-58.
[15]	谢延敏, 孙新强, 田银, 何育军, 卓德志. 基于改进粒子群算法和小波神经网络的高强钢扭曲回弹工艺参数优化^*[J]. 机械工程学报, 2016, 52(19): 162-167.