An Experimental Study of Springback for Dual Phase Steel and Conventional High Strength Steel

Konieczny, A.; Shi, Ming; Du, Changqing

doi:10.4271/2001-01-3106

Cited by 12 publications

(4 citation statements)

References 6 publications

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“…This property enhances more uniform deformation in the forming process and also contributes to absorb more impact energy, making them attractive for application in components designed to absorb energy by crushing [3]. However, the DP-Steel displays higher spring-back and side-wall curl than the HSLA *Corresponding author: kchung@snu.ac.kr steel due to its higher as-formed yield strength [4].…”

Section: Introductionmentioning

confidence: 99%

Measurements of anisotropic yielding, bauschinger and transient behavior of automotive dual-phase steel sheets

et al. 2003

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In order to present better prediction capability in computational analysis, mechanical properties of the dualphase high strength steel have been characterized especially for anisotropy as well as the Bauschinger and transient behavior. As for the anisotropy, the non-quadratic anisotropic yield function Yld2000-2d has been utilized and its material parameters have been obtained using the uni-axial tension tests as well as the hydraulic bulge test. To measure the hardening behavior including the Bauschinger and transient behavior, a newly developed test method has been applied for the uni-axial tension/compression and compression/tension tests, in which solid blocks along the both sides of the sheet specimen prevent buckling. From the tension/compression curves, the equations to describe isotropic and kinematic hardening behavior have been obtained. The modified Chaboche model has been confirmed to well represent the hardening behavior including the Bauschinger and transient behavior.

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Section: Introductionmentioning

confidence: 99%

Measurements of anisotropic yielding, bauschinger and transient behavior of automotive dual-phase steel sheets

et al. 2003

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“…High work hardening is also an important feature of the dual phase steel. Recently an experiment made by Konieczny [10] shows that the forming limit of two phase steel can also be calculated through ASM formula with n values and the thickness of material be given. The forming region depends on the material forming limit and its strain.…”

Section: Experimental Results Analysismentioning

confidence: 99%

The Microstructure and Formability Study on DP Steel of Lightweight Automobile

Jin

Liang

et al. 2011

MSF

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Dual phase (DP) steel is a high strength steel for auto-panel. In this paper, mechanical property, forming ability, baked-hardening and work hardening properties of high strength steel DP450 are studied by experiments, and compared with those of steel MS6000.And theoretical research on predicting the forming limit of steel DP450 by the NADDRG model. The established mathematic model for relativity is of practical usefulness. Experimental results reveal that the yield strength of steel DP450 is about 7.2% lower than the MS6000,and the break strength increases by 18.9%,while the elongation increases by 19%.The strain hardening exponent of steel DP450 are superior to those of MS6000.The results show that mechanical property of high strength steel DP450 is better than that of MS6000,while forming ability of DP450 is not lower than that of MS6000.And baked-hardening and work hardening properties of steel DP450 are better than those of MS6000.The steel sheet DP450 owned a good forming ability.

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“…Many studies have analyzed and investigated the effect of parameters on the springback effect on various grades of AHSS [4][5][6][7][8][9][10]. The amount of springback is influenced by various process parameters, such as gap between punch and die, material thickness [4], forming force, tool radius [5][6], ratio between die radius and thickness [7], blank holder force [8], and material properties including sheet anisotropy, Young's modulus, strength coefficient, and strain hardening exponent [9]. Nowadays, the prediction of such forming defects using numerical simulation becomes a critical step and popular in modern industry, which allow reduction of traditional costly trial-and-error experiments.…”

Section: Introductionmentioning

confidence: 99%

Effect of Springback in Dp980 Advanced High Strength Steel on Product Precision in Bending Process

Le¹,

Vu²,

Doan³

et al. 2019

Acta Metall Slovaca

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Springback is a common phenomenon in sheet metal forming, in which the material undergoes an elastic recovery as applied loads are removed. Springback causes the forming shape to deviate from the intended design geometry. This phenomenon, which can be influenced by several factors, effects on both bending angle and bending curvature. The aim of this study is to determine the influence of different tool radius and the gap between punch and die on springback in bending of DP980 Advanced High-Strength Steels (AHSS) sheet. Experimental studies are combined with FEM method in commercial ABAQUS software to determine the bending angle after springback. To predict springback in bending process, the material properties are defined by Ludwik - Hollomon law, combined with the Hill’48 criterion. Experimental results are in good agreement with numerical simulations in case of bending in the rolling direction.

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An Experimental Study of Springback for Dual Phase Steel and Conventional High Strength Steel

Cited by 12 publications

References 6 publications

Measurements of anisotropic yielding, bauschinger and transient behavior of automotive dual-phase steel sheets

Measurements of anisotropic yielding, bauschinger and transient behavior of automotive dual-phase steel sheets

The Microstructure and Formability Study on DP Steel of Lightweight Automobile

Effect of Springback in Dp980 Advanced High Strength Steel on Product Precision in Bending Process

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