Superplastic Forming of Triangular Channels with Sharp Radii

Jarrar, Firas; Liewald, Mathias; Schmid, Philipp; Fortanier, Alexander

doi:10.1007/s11665-014-0878-y

Cited by 15 publications

(13 citation statements)

References 9 publications

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“…Accurate constitutive material models are essential for the realistic simulation of the SPF process. Many established models found in the literature are identified as phenomenological material models [6][7][8][9][10][16][17][18][19][20][21]. These are viscoplastic models that represent the macroscopic behavior of deformation, usually at a constant forming temperature.…”

Section: Constitutive Modelingmentioning

confidence: 99%

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An Accurate Constitutive Model for AZ31B Magnesium Alloy during Superplastic Forming

Dai

Jarrar

Öztürk

et al. 2019

Metals

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Accurate constitutive material models are essential for the realistic simulation of metal forming processes. However, for superplastic forming, mostly the material models found in the literature are based on fitting of the simple power law equation. In this study, an AZ31B constitutive model that takes into account microstructural evolution is introduced. This model takes into account grain growth and cavity formation in addition to strain and strain rate hardening. The model parameters were calibrated using the results of high temperature bulge forming tests and microstructural analysis. The Taguchi optimization method was used in the fitting process. In order to verify the model, simulations of the superplastic forming of two different geometries were carried out, and the results were compared with those obtained experimentally. Results show that the proposed model can accurately predict the formed geometry and thickness distribution.

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Section: Constitutive Modelingmentioning

confidence: 99%

“…When incorporated in the simulation of superplastic forming (SPF), the simple material models were reported to produce unsatisfactory results [6][7][8][9][10]. The main reason many studies rely on simple material models is the difficulty in determining the material constants.…”

Section: Introductionmentioning

confidence: 99%

An Accurate Constitutive Model for AZ31B Magnesium Alloy during Superplastic Forming

Dai

Jarrar

Öztürk

et al. 2019

Metals

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“…Moreover, the nodes beyond 40 mm from the center of the sheet were constrained in the x and y directions to simulate the clamping pressure. A coulomb friction coefficient of 0.1 was used in the simulation based on the findings of previous studies [6][7][8]. Finally, the gas pressure was automatically applied by an internal algorithm in ABAQUS TM in order to target a maximum effective strain rate of 0.00005 s -1 during the deformation.…”

Section: Simulationmentioning

confidence: 99%

Using the particle swarm optimization method for the constitutive modeling of AZ31B

Zhong

Dai

Jarrar

et al. 2017

Materialwissenschaft Werkst

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The magnesium alloy AZ31B has a great potential for lightweight applications that do not require high strength. The superplastic forming method is already being used to form this alloy into complex lightweight components. However, in order to provide accurate predictions of the superplastic process of AZ31B, suitable constitutive models should be established. In this paper, the particle swarm optimization method is used to identify the parameters of a suitable constitutive model. High temperature bulge experiments are used to validate the model. Results indicate that the proposed power law model gives more accurate predictions for the lower strain rates.

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“…Jarrar and Nazzal (2013) used the finite element software ABAQUS TM to simulate superplastic forming of a deep rectangular pan and investigated the effect of the wall inclination angle on the forming time and thickness distribution. In a more recent study (Jarrar, Liewald, Schmid, & Fortanier, 2014) conducted an experimental and numerical study to investigate the optimum geometrical features of triangular channels at the base of cylindrical cups. The parts were formed using AA5083 sheets at a temperature of 500 o C.…”

Section: Introductionmentioning

confidence: 99%

Design for Manufacturing of an Aluminum Superplastic AA5083 Alloy Plate-Fin Heat Exchanger

Juneidi¹,

Asha²,

Jarrar³

et al. 2016

JMSR

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Compact, lightweight, strong, and corrosion-resistant heat exchangers are required for many applications. In heat exchangers, plate-fin exchangers design with corrugated fins of triangular cross-sections provide high heat transfer surface area to volume ratio. This study focuses on the design for manufacturing of an aluminum AA5083 alloy plate-fin heat exchanger. The superplastic forming method is considered for the fabrication of the heat exchanger. A two-dimensional plane strain finite element model is used to study the effect of the triangular fins' aspect ratio on the thickness distribution and the required gas forming pressure cycles. The simulation results show that the thinning in deep channels can be improved by increasing the coefficient of friction but only up to a certain limit. In addition, increasing the coefficient of friction reduces the required applied pressure on the sheet and increases the forming time. The present effort represents a necessary step toward the design of sophisticated corrugated triangular fin surfaces considering both performance and manufacturability.

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Superplastic Forming of Triangular Channels with Sharp Radii

Cited by 15 publications

References 9 publications

An Accurate Constitutive Model for AZ31B Magnesium Alloy during Superplastic Forming

An Accurate Constitutive Model for AZ31B Magnesium Alloy during Superplastic Forming

Using the particle swarm optimization method for the constitutive modeling of AZ31B

Design for Manufacturing of an Aluminum Superplastic AA5083 Alloy Plate-Fin Heat Exchanger

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