ANALYTICAL CONSIDERATION OF SPRINGBACK PREDICTING DUAL-PHASE STEELS SHEETSDURING U- FORM BENDING PROCESS BASED ON ANISOTROPIC NONLINEAR KINEMATICHARDENING MODEL

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ZAJKANI ASGHAR; HAJBARATI HAMID

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:8 Page(s): 0-0

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Title

ANALYTICAL CONSIDERATION OF SPRINGBACK PREDICTING DUAL-PHASE STEELS SHEETSDURING U- FORM BENDING PROCESS BASED ON ANISOTROPIC NONLINEAR KINEMATICHARDENING MODEL

Author(s)

ZAJKANI ASGHAR | HAJBARATI HAMID | Issue Writer Certificate

Keywords

SPRINGBACKQ2

BAUSCHINGER EFFECTQ1

DUAL-PHASE STEELQ1

U-SHAPED BENDING PROCESSQ1

ANISOTROPIC HARDENINGQ1

Abstract

An undesirable factor that affects the dimensional precision and final shape of metallic parts producedin cold forming processes is SPRINGBACK phenomenon. An analytical model is introduced to predictSPRINGBACK in U-SHAPED BENDING PROCESS of DP780 dual phase steel sheet. This analytical model is basedon the Hill48 yield criterion and plane strain condition. In this model, the effect of forming history, sheet thinning and the motion of the neutral surface on the SPRINGBACK of U-SHAPED BENDING PROCESS istaken into account. The anisotropic nonlinear kinematic hardening model is used to consider the impactof complex deformation, including stretching, bending and reverse bending. This model is able toinvestigate the complex hardening behavior of material such as BAUSCHINGER EFFECT, transient behaviorand permanent softening. The effect of the sheet holder force, the coefficient of friction, thickness, material anisotropy and hardening parameters on the sheet SPRINGBACK is studied. It can be seen thatanalytical model which is presented in this paper has good accuracy in the SPRINGBACK prediction incomparison with FEM method and results are close to experimental data. The results show that the sheetholder force, the coefficient of friction, thickness and material anisotropy have considerable influenceon the SPRINGBACK prediction. Since, the sheet experiences a reverse loading during the forming process, hardening parameters of the material have a significant influence on the SPRINGBACK prediction. It can beseen that the BAUSCHINGER EFFECT has more influence on the SPRINGBACK prediction than the permanentsoftening and transient behavior.

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APA: Copy

ZAJKANI, ASGHAR, & HAJBARATI, HAMID. (2016). ANALYTICAL CONSIDERATION OF SPRINGBACK PREDICTING DUAL-PHASE STEELS SHEETSDURING U- FORM BENDING PROCESS BASED ON ANISOTROPIC NONLINEAR KINEMATICHARDENING MODEL. MODARES MECHANICAL ENGINEERING, 16(8), 0-0. SID. https://sid.ir/paper/356660/en

Vancouver: Copy

ZAJKANI ASGHAR, HAJBARATI HAMID. ANALYTICAL CONSIDERATION OF SPRINGBACK PREDICTING DUAL-PHASE STEELS SHEETSDURING U- FORM BENDING PROCESS BASED ON ANISOTROPIC NONLINEAR KINEMATICHARDENING MODEL. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(8):0-0. Available from: https://sid.ir/paper/356660/en

IEEE: Copy

ASGHAR ZAJKANI, and HAMID HAJBARATI, “ANALYTICAL CONSIDERATION OF SPRINGBACK PREDICTING DUAL-PHASE STEELS SHEETSDURING U- FORM BENDING PROCESS BASED ON ANISOTROPIC NONLINEAR KINEMATICHARDENING MODEL,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 8, pp. 0–0, 2016, [Online]. Available: https://sid.ir/paper/356660/en

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