Macro-performance evaluation of friction stir welded automotive tailor-welded blank sheets: Part II - Formability

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:47

Article

Kim, Daeyong²  Lee, Wonoh³  Kim, Junehyung⁴  Chung, Kyung-Hwan⁵  Kim, Chongmin⁶  Okamoto, Kazutaka⁷  Wagoner, R. H.⁸  Chung, Kwansoo¹ 

[1] Seoul Natl Univ, Res Inst Adv Mat, Dept Mat Sci & Engn, Seoul 151742, South Korea

[2] Korea Inst Mat Sci, Appl Plast Res Grp, Chang Won 641010, Kyungnam, South Korea

[3] Korea Inst Mat Sci, Composite Mat Res Grp, Chang Won 641010, Kyungnam, South Korea

[4] Samsung Elect Co Ltd, Telecommun Network Business, Div Mobile Commun, Adv Mech R&D Group, Suwon 443742, Gyeonggi Do, South Korea

[5] POSCO, Tech Res Labs, Automot Steel Applicat Res Grp, Gwangyang Si 545090, Jeonnam, South Korea

[6] GM Corp, GM R&D & Planning, Mat Proc Lab, Warren, MI 48090 USA

[7] Hitachi Amer Ltd, Div Res & Dev, Farmington Hills, MI 48335 USA

[8] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA

关键词: Formability;    Friction stir welding;    Tailor-welded blanks;    Aluminum alloy sheets;    DP-steel sheets;    Forming limit diagram;    Hemispherical dome stretching tests;    Cylindrical cup drawing tests;   

DOI  :  10.1016/j.ijsolstr.2009.12.021

来源: Elsevier

【 摘 要 】

Formability of automotive friction stir welded TWB (tailor-welded blank) sheets was experimentally and numerically investigated in this work for four automotive sheets, aluminum alloy 6111-T4, 5083-H18, 5083-O and DP590 steel sheets, each having one or two different thicknesses. In particular, formability in three applications including the simple tension test with various weld line directions, hemisphere dome stretching and cylindrical cup drawing tests was evaluated. For numerical simulations, mechanical properties previously characterized in a joint paper (Chung et al., 2010) were utilized. To represent the mechanical properties, the non-quadratic orthogonal anisotropic yield function, Yld2000-2d, was utilized along with the (full) isotropic hardening law, while the anisotropy of the weld zone was ignored for simplicity. (C) 2010 Elsevier Ltd. All rights reserved.

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