锻压技术

DP780高强双相钢激光拼焊接头GTN损伤模型参数标定

英文标题：GTN damage model parameters calibration on laser tailor welded joint for DP780 high strength dual-phase steel

关键词：DP780高强双相钢激光拼焊接头 GTN损伤模型损伤参数极限拱顶高度失效模式

分类号：TG407

出版年,卷(期):页码：2023,48(2):241-249

摘要：

为了获得DP780高强双相钢激光拼焊接头的模拟参数，根据混合法则对激光拼焊接头进行区域细化，采用ABAQUS有限元仿真软件对母材、焊缝和纵向接头的拉伸实验以及极限拱顶高度实验进行了有限元建模，依据拉伸实验的工程应力-工程应变、拉伸试样断裂位置及拼焊板断裂失效模式结果并结合有限元反推法，确定了接头各区域的GTN损伤模型参数，从而对横向接头的拉伸实验和极限拱顶高度实验进行了模拟。结果表明：不同热输入下接头的拉伸实验曲线与模拟曲线、模拟断裂位置与实际断裂位置较吻合；拼焊板失效时的极限拱顶高度值与实验值相接近；拼焊板失效模式与实验结果相一致。

In order to obtain the simulation parameters of laser tailor welded joint for DP780 high strength dual-phase steel, the laser tailor welded joint was area-refined according to the mixing law, and the finite element (FE) modeling of base metal, weld and longitudinal joint tensile test and limit dome height(LDH) test was conducted by ABAQUS FE simulation software. Then, according to the results of engineering stress-engineering strain for tensile test, fracture position of tensile sample and fracture failure mode of the laser tailor welded blanks (LTWBs) and the FE inversion method, the parameters of the GTN damage model in each joint partition were determined, and the tensile test and LDH test of the transverse joint were simulated. The results show that the tensile test curves of joints under different heat inputs are consistent with the simulated curves, and the simulated fracture position is consistent with the actual fracture position. The LDH value when the tailor welded blank fails is close to the test value, and the failure mode of tailor welded blank is in good agreement with the test results.

基金项目：

2017年度广西高校中青年教师基础能力提升项目（2017KY0255）

作者简介：郭建超（1992-），男，硕士，助教，E-mail：2890119367@qq.com；通信作者：赵琳（1980-），女，学士，高级工程师，E-mail：298669743@qq.com

参考文献：

[1]Ma X D, Guan Y P, Yang L. Determination of elastoplastic mechanical properties of the weld and heat affected zone metals in tailor-welded blanks by nanoindentation test[J]. Chinese Journal of Mechanical Engineering, 2015, 28(5): 911-918.

[2]吴义．基于损伤的7075-T6铝合金HFQ工艺成形性研究[D].大连：大连理工大学, 2017．

Wu Y. Experimental Study on Formability of 7075-T6 Aluminum Alloy HFQ Based on Damage[D]. Dalian:Dalian University of Technology, 2017.

[3]Zhao P J, Chen Z H, Dong C F. Investigation and prediction of testing failure during extrusion based on a modified shear damage model[J]. Mechanics of Materials,2017,112(9):28-39.

[4]张宇，张稳，庄新村.拉伸预应变条件下基于孔洞演变分析的 GTN 损伤模型参数研究[J]．塑性工程学报,2019，26 (5):239-248.

Zhang Y，Zhang W，Zhuang X C. Parametric study of GTN model under tensile pre-straining condition based on void evolution analysis[J]．Journal of Plasticity Engineering，2019，26 (5): 239-248.

[5]周芃，朱荣宇，石婵，等．基于GTN模型5A06铝合金温成形损伤建模[J]．塑性工程学报，2020，27 (12): 164-169.

Zhou P，Zhu R Y，Shi C，et al.Modeling of warm forming damage of 5A06 aluminum alloy based on GTN model[J]. Journal of Plasticity Engineering，2020，27 (12): 164-169.

[6]韩蒙，李迪，孙彩凤，等.基于修正 GTN 模型的双相钢断裂失效判据研究[J]．塑性工程学报，2020,27 (1):117-122.

Han M，Li D，Sun C F，et al. Study on fracture failure criterion of dual phase steel based on modified GTN model[J]．Journal of Plasticity Engineering，2020，27 (1): 117-122.

[7]Sun Q, Lu Y B, Chen J J. Identification of material parameters of a shear modified GTN damage model by small punch test[J]. International Journal of Fracture, 2020,222(1/2):25-35.

[8]Rasid A Y, Safak Y.Influence of heat treatments on the formability of the 6061 Al alloy sheets experiments and GTN damage model[J]. Journal of Advanced Manufacturing Technology,2021,113(7/8):2277-2299.

[9]Tvergaard V. Influence of void nucleation on ductile shear fracture at a free surface[J]. Journal of the Mechanics and Physics of Solids, 1982, 30(6): 399-425.

[10]Tvergaard V. Influence of voids on shear band instabilities under plane-strain conditions[J]. International Journal of Fracture, 1981, 17(4): 389-407.

[11]Tvergaard V, Needleman A, Lo K K. Flow localization in the plane strain tensile test[J]. Journal of the Mechanics and Physics of Solids, 1981, 29(2): 115-142.

[12]Tvergaard V, Needleman A. Analysis of the cup-cone fracture in a round tensile bar[J]. Acta Metallurgica, 1984, 32(1): 157-169.

[13]闫玉曦.带钢边部缺陷在轧制过程中的开裂行为研究[D].上海：华东理工大学.2014

Yan Y X. Research on the Fracture Behavior of Edge Defects in Steel Strips During Rolling Process [D]. Shanghai:East China University of Science and Technology,2014.

[14]Yan Y X, Sun Q, Chen J J, et al. The initiation and propagation of edge cracks of silicon steel during tandem cold rolling process based on the Gurson-Tvergaard-Needleman damage model[J]. Journal of Materials Processing Technology, 2013, 213(4): 598-605.

[15]Abdullah K, Wild P M, Jeswiet J J, et al. Tensile testing for weld deformation properties in similar gage tailor welded blanks using the rule of mixtures[J]. Journal of Materials Processing Technology, 2001,112(1):91-97.

[16]孙东继，林建平，胡巧声，等．金属板料幂指型硬化模型应变强化系数K值研究[J]. 塑性工程学报, 2009, 16(1): 149-152.

Sun D J，Lin J P，Hu Q S，et al．Research on strength coefficient in power hardening model of sheet metal[J]．Journal of Plasticity Engineering，2009，16 (1): 149-152.

[17]方健，魏毅静，王承忠. 拉伸应变硬化指数的解析测定及力学分析[J]. 塑性工程学报, 2003, 10(3): 12-17.

Fang J，Wei Y J，Wang C Z.Analytical measurement and mechanical study on the tensile strain hardening exponent[J]．Journal of Plasticity Engineering，2003，10 (3): 12-17.

[18]Tvergaard V, Needleman A. Analysis of the cup-cone fracture in a round tensile bar[J]. Acta Metallurgica, 1984, 32(1): 157-169.

[19]Chu C C, Needleman A. Void nucleation effects in biaxially stretched sheets[J]. Journal of Engineering Materials and Technology, 1980, 102(3): 249-256.

[20]Hecker S S. A cup test for assessing stretchability[J]. Metals Engineering Quarterly, 1974, 14: 30-36.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】