Finite element and experimental analyses of cylindrical hole flanging in incremental forming

Hussain, G.; Valaei, Hatef; Al‐Ghamdi, Khalid A.; Khan, B.

doi:10.1016/s1003-6326(16)64362-5

Cited by 12 publications

(2 citation statements)

References 17 publications

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“…Husain et al simulated the material behaviour during the hole flanging by SPIF of rolled AA1060 aluminium sheet. They used a combination of shell and solid elements and analysed the thickness variation along the flange wall [9]. Another paper also analyses the thickness variation but in the case of the SPIF of pyramidal frustum shapes for DC04 steel [10].…”

Section: Introductionmentioning

confidence: 99%

Numerical-Experimental Study Regarding the Single Point Incremental Forming Process

2021

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The present paper proposes a numerical-experimental comparative study on the single point incremental forming process. A DC04 steel sheet with a thickness of 0.6 mm was used for both the numerical simulation using the finite element method and the experimental research. The type of trajectory used was a spiral trajectory and the finished part obtained was a truncated cone-shaped part. The analysis program used for simulation was Ls-Dyna. The simulations were performed in several variants: with a fixed mesh and with an adaptive mesh, using two different element formulations: 25 (Belytschko-Tsay formulation with thickness stretch) and -16 (fully integrated shell element modified for higher accuracy) and two contact types: automatic surface to surface (ASTS) and forming one way surface to surface (FOSS). The results of the numerical analysis and of the experimental research were focused on determining the major strain, minor strain, thickness reduction and forces at the end of the single point incremental forming process, as well as determining the processing time.

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Section: Introductionmentioning

confidence: 99%

Numerical-Experimental Study Regarding the Single Point Incremental Forming Process

2021

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“…Compared to other previously employed strategies, the one they presented improved the thickness distribution and production time. The effect of the pre-cut hole diameter on the four-stage IHF was analyzed by Hussain et al [8]. It was shown that there is a threshold pre-cut hole diameter that has the highest formability in aluminum sheets.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Ductile Damage and Fracture in the Single and Multi-stage Incremental Hole-flanging Process Using a New Damage Accumulation Law

Seyyedi

Gorji

Mirnia

et al. 2021

Preprint

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Incremental hole-flanging (IHF) is a process in which a sheet with a pre-cut hole is flanged by the single point incremental forming (SPIF) process. Fracture prediction in IHF, such as SPIF, is associated with many challenges due to the deformation mechanisms. The purpose of this paper is to overcome the existing limitations and challenges, and thus, to predict accurately failure in single, and multi-stage IHF processes. To this end, the modified Mohr-Coulomb (MMC) criterion was implemented using an appropriate user subroutine in a finite element method (FEM) model. The AA6061-T6 aluminum alloy sheet, which has low formability, and is fractured from its free edges in the IHF process, was examined as an example. Initially, a linear damage accumulation law, in which the prediction error is high due to the non-linear stress and strain states in the IHF, was used to predict the fracture. Therefore, in the next step, a non-linear damage accumulation function was utilized. While the non-linear accumulation accurately predicts the single-stage IHF fracture, it is not able to predict the fracture well in the multi-stage IHF. It was observed that in multi-stage IHF, the rate of damage accumulation decreases with increasing the number of forming stages. Accordingly, a new non-linear damage accumulation rule was developed. Experimental and numerical results indicated acceptable accuracy of the proposed non-linear accumulation in the fracture prediction in the single and multi-stage IHF process.

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Formation of Hole Flanges Through Incremental Forming: A Review

Dewang¹,

Tenguria

Sharma³

et al. 2019

Lecture Notes in Mechanical Engineering

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Finite element and experimental analyses of cylindrical hole flanging in incremental forming

Cited by 12 publications

References 17 publications

Numerical-Experimental Study Regarding the Single Point Incremental Forming Process

Numerical-Experimental Study Regarding the Single Point Incremental Forming Process

Prediction of Ductile Damage and Fracture in the Single and Multi-stage Incremental Hole-flanging Process Using a New Damage Accumulation Law

Formation of Hole Flanges Through Incremental Forming: A Review

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