A modified Johnson–Cook model of dynamic tensile behaviors for 7075-T6 aluminum alloy

Zhang, Ding-Ni; Shangguan, Qianqian; Xie, Can-Jun; Liu, Fu

doi:10.1016/j.jallcom.2014.09.002

Cited by 228 publications

(70 citation statements)

References 28 publications

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“…Furthermore, the Johnson-Cook material model parameters were studied for Ti-6Al-4V and 7075-T6 aluminum alloy by Wang and Shi [35] and Zhang et al [36], respectively. Recently, Buchkremer et al [37] focused on the damage parameters of the Johnson-Cook material model of AISI 1045 steel.…”

Section: Damage In the Cupmentioning

confidence: 99%

Experimental and Numerical Studies of Sheet Metal Forming with Damage Using Gas Detonation Process

Patil

Prajapati

Jenkouk

et al. 2017

Metals

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Abstract:Gas detonation forming is a high-speed forming method, which has the potential to form complex geometries, including sharp angles and undercuts, in a very short process time. Despite many efforts being made to develop detonation forming, many important aspects remain unclear and have not been studied experimentally, nor numerically in detail, e.g., the ability to produce sharp corners, the effect of peak load on deformation and damage location and its propagation in the workpiece. In the present work, DC04 steel cups were formed using gas detonation forming, and finite element method (FEM) simulations of the cup forming process were performed. The simulations on 3D computational models were carried out with explicit dynamic analysis using the Johnson-Cook material model. The results obtained in the simulations were in good agreement with the experimental observations, e.g., deformed shape and thickness distribution. Moreover, the proposed computational model was capable of predicting the damage initiation and evolution correctly, which was mainly due to the high-pressure magnitude or an initial offset of the workpiece in the experiments.

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Section: Damage In the Cupmentioning

confidence: 99%

Experimental and Numerical Studies of Sheet Metal Forming with Damage Using Gas Detonation Process

Patil

Prajapati

Jenkouk

et al. 2017

Metals

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“…Among the models developed for describing the flow curve at high strain rate, the Johnson-Cook model is one of the most used and cited in literature [12,13,[33][34][35][36]. In the present work, the model capability to accurately predict the plastic flow behaviour of AA7075-O has been improved by modifying the static part of the Johnson-Cook equation according to the Voce model [37].…”

Section: Plastic Flow Behaviourmentioning

confidence: 99%

Frictional behaviour of AA7075-O aluminium alloy in high speed tests

Forcellese

Mancini

Sasso

et al. 2016

Int J Adv Manuf Technol

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The influence of strain rate on the frictional behaviour of AA7075 aluminium alloy, in the O-annealed temper state, was studied. Attention was focused on the evaluation of the mechanisms affecting friction at high strain rate. To this purpose, axisymmetric and ring compression tests were carried out using the split Hopkinson tension-compression bar in the direct version. The flow curves were investigated in a wide range of strain rates using cylindrical specimens characterised by different slenderness ratios. The results of the axisymmetric compression tests showed an appreciable strain rate sensitivity of the deforming material with a marked increase in flow stress with strain rate in the dynamic loading condition. As far as the ring compression tests are concerned, different strain rates were obtained using hollow cylinders with different initial sizes. The analysis of the results showed that strain rate affects the variation of the inner ring diameter, irrespective of the height reduction and frictional condition. Axysimmetric and ring compression tests were also performed under the quasi-static loading condition and the experimental results did not show any appreciable effect of strain rate on flow curves and frictional behaviour. Finally, the different frictional behaviour between the quasi-static and dynamic loading conditions was attributed both to the reduction in the lubricant film thickness and change in the viscous actions at the specimen-tool interface.

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“…Due to the precipitation of Mg 2 Zn and Al2CuMg phases 7075 aluminum alloy presents good machinability, mainly high mechanical strength and specific stiffness [1][2][3], which makes it suitable for the fabrication of structural components for aerospace and automotive industries. Due to its chemical composition this alloy is susceptible to various forms of localized corrosion [4][5][6].…”

Section: Introductionmentioning

confidence: 99%