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International Journal of Material Forming

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02.10.2018 | Original Research

An extension of Rice localization criterion to predict the onset of shear localization in semi-solid materials

verfasst von: M. H. Sheikh-Ansari, M. Aghaie-Khafri

Erschienen in: International Journal of Material Forming | Ausgabe 4/2019

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Abstract

Semi-solid materials undergo strain localization and shear band formation as a result of the irregular (local) rearrangement of globular particles. Concerning the formation of a solid network, a granular constitutive relation was developed to incorporate the deformation of solid bonds, as well as solid grains, volumetric strain and the internal friction between solid grains. Considering the fact that the occurrence of instability in viscoplastic materials can be determined by applying the rate-independent stability criterion, as developed in Pan’s analysis of strain localization in rate-sensitive materials, a proper criterion for the assessment of localization phenomenon during the mushy state deformation was proposed. Calculating the critical hardening modulus reveals that the localization in semi-solid materials is induced by flow softening. The flow localization predicted by the presented model was fairly well correlated with the experimental results.

Vorheriger Artikel A viscoplastic model based on a variable strain rate sensitivity index for superplastic sheet metals

Nächster Artikel Hybrid constitutive modeling: data-driven learning of corrections to plasticity models

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Titel: An extension of Rice localization criterion to predict the onset of shear localization in semi-solid materials
verfasst von: M. H. Sheikh-Ansari
M. Aghaie-Khafri
Publikationsdatum: 02.10.2018
Verlag: Springer Paris
Erschienen in: International Journal of Material Forming / Ausgabe 4/2019
Print ISSN: 1960-6206
Elektronische ISSN: 1960-6214
DOI: https://doi.org/10.1007/s12289-018-1445-0

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