Characterization of mechanical properties by indentation tests and FE analysis - validation by application to a weld zone of DP590 steel

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:46

Article

Chung, Kyung-Hwan⁶  Lee, Wonoh⁵  Kim, Ji Hoon⁴  Kim, Chongmin^2,3  Park, Sung Ho⁶  Kwon, Dongil¹  Chung, Kwansoo¹ 

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Intelligent Text Syst Res Ctr, Seoul 151742, South Korea

[2] R&D Ctr, Mat & Proc Lab, Warren, MI 48090 USA

[3] NAO Planning Gen Motors, Warren, MI 48090 USA

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

[5] Korea Inst Mat Sci, Composite Mat Res Group, Chang Won 641010, Kyungnam, South Korea

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

关键词: DP-steel;    MAG weld zone;    Strain-rate sensitivity;    Formability;    Continuous indentation method;   

DOI  :  10.1016/j.ijsolstr.2008.08.041

来源: Elsevier

【 摘 要 】

In this work, the mechanical properties of the metal active gas (MAC) weld zone and heat affected zone (HAZ) were characterized utilizing the continuous indentation method together with its finite element (FEM) analysis. To verify the measured properties, uni-axial tension and three point bending tests were performed for DP590 welded specimens. For numerical simulations, the isotropic hardening law was assumed along with the non-quadratic anisotropic yield function, Yld2000-2d. As for the failure criterion of the base material and weld zones particularly for the failure evaluation in the uni-axial tension test, Hill's bifurcation theory and the M-K theory were applied to calculate the forming limit diagrams considering all measured properties including strain-rate sensitivity. (C) 2008 Elsevier Ltd. All rights reserved.

【 授权许可】

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