Numerical modelling of the gas detonation process of sheet metal forming

Patil, Sandeep P.; Popli, Madhur; Jenkouk, Vahid; Markert, Bernd

doi:10.1088/1742-6596/734/3/032099

Cited by 9 publications

(14 citation statements)

References 6 publications

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“…The blank sits perfectly into the die seat, with a depth of 15 mm. In our previous work [31], as well as Yasar [12], it is clear that when the applied load is triangular, i.e., load increases with a lower slop than that of the experiments, the spring-back effects are observed. In the present work, load was instantaneously (high slop of pressure loading profile) like that in the experiments, and hence, the spring-back effect was not observed.…”

Section: Cup Formationmentioning

confidence: 73%

“…In our previous work [31,33], we concluded that the loading rate, i.e., the time instant at which the peak pressure acts on the blank, has a significant influence on the thickness distribution and the radial strain of the blank. The work highlighted the fact that the obtained results from the numerical model were very sensitive to the loading rate.…”

Section: Thickness Variationmentioning

confidence: 89%

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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: Cup Formationmentioning

confidence: 73%

Section: Thickness Variationmentioning

confidence: 89%

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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“…Moreover, the loading rate in the numerical model is very sensitive, even a little change in a load can affect the extreme change in model results. Therefore, we used the precisely same experimental loading curve in numerical simulations using well calibrated measuring devices [21][22][23].…”

Section: Thickness Distributionmentioning

confidence: 99%

“…In our previous work, we have studied DC04 metal forming using gas detonation forming process experimentally and numerically. Wherein, investigation of detonation pressure, deformed cup, thickness distribution, radial strain and damage in a cup were studied [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Deformation of Stacked Metallic Sheets by Shock Wave Loading

Patil

Murkute

Shirafkan

et al. 2018

Metals

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The focus of the present work is to develop a deep understanding of deformation of stacked metal sheets with a series of different sequences by using shock wave loading. Here, experimental and numerical investigations of deformation of a single metal sheet of 1.5-mm and the stack of three metal sheets of 0.5-mm thickness of aluminum (Al), copper (Cu) and brass (Br) material were carried out. In the shock wave experiments, helium was used as the driving gas to produce a strong shock wave. Finite elements method (FEM) simulations on 3D-computational models were performed with explicit dynamic analysis, and Johnson-Cook material model was used. The obtained results from experiments of the outer diameter, thickness distribution, and dome height were analyzed and compared with the numerical simulations, and both the results are in excellent agreement. Moreover, for the same pressure load, due to lower inter-metallic friction in the stacked sheets compared to a cohesive property of the single sheet, an excellent deformation of stacked metallic sheets was observed. The results of this work indicated that the shock wave-forming process is a feasible technique for mass production of stacked metallic sheets as well as fabricating a hierarchical composite structure, which provides higher formability and smooth thickness distribution compared to a single material.

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“…where ℎ -initial height of the cylinder equal to the distance from the elastic disk surface up to the processed workpiece. By inserting expressions (13), (14), (17), (18) in the equation (12) we get the equation describing air pressure variation in the cylinder:…”

Section: Advances In Engineering Research Volume 177mentioning

confidence: 99%

Multichamber Device for Sheet-Metal Treatment Under Pressure

Musayev¹,

Elmurzayev²,

Betrakhmadov³

et al. 2018

Proceedings of the International Symposium “Engineering and Earth Sciences: Applied and Fundamental Research” (ISEES 2018)

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The multichamber device belongs to pulsed methods of forming and is mainly intended for use in small-scale production. The process of forming is carried out under pressure of an elastic disk due to kinetic energy of the piston accumulated throughout the working cycle. The piston is accelerated under pressure of high-temperature gas, which is formed in the combustion chamber during the combustion of gaseous fuel mixes. The paper suggests design modifications of the existing device in order to expand its technological potential by increasing the kinetic energy of the piston. This is achieved due to end-to-end channel in the elastic disk and the piston connecting a head-end volume of the working cylinder with the combustion chamber, where the backpressure valve is installed at the end of the channel on the side of the combustion chamber. Keywordssheet forming, elastic medium, gas forming, kinetic energy, backpressure valve, multichamber device, fuel mix, gas pressureInternational Symposium on Engineering and Earth Sciences (ISEES 2018)

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Numerical modelling of the gas detonation process of sheet metal forming

Cited by 9 publications

References 6 publications

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

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

Deformation of Stacked Metallic Sheets by Shock Wave Loading

Multichamber Device for Sheet-Metal Treatment Under Pressure

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