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Understanding and modeling of void closure mechanisms in hot metal forming processes: a multiscale approach

Abstract : The presence of voids after casting processes of large metal workpieces requires the use of adapted hot metal forming processes to deliver sound products. Yet, there is at present a lack of knowledge regarding void closure mechanisms and there is no reliable model that can accurately predict void closure. A new model accounting for both stress triaxiality ratio and Lode angle is proposed. Based on an advanced multiscale approach, this model also accounts for voids shape and orientation with respect to loading direction.
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Submitted on : Thursday, December 22, 2016 - 4:21:27 PM
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  • HAL Id : hal-01421656, version 1

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Pierre-Olivier Bouchard, Abdelouahed Chbihi, Marc Bernacki, Daniel Pino Muñoz. Understanding and modeling of void closure mechanisms in hot metal forming processes: a multiscale approach. NUMIFORM 2016: The 12th International Conference on Numerical Methods in Industrial Forming Processes, The Minerals, Metals & Materials Society, Jul 2016, Troyes, France. ⟨hal-01421656⟩

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