Formability prediction of substrate-supported metal layers using a non-associated plastic flow rule

Autor: Farid Abed-Meraim, Mohamed Ben Bettaieb
Přispěvatelé: Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Labex DAMAS, Université de Lorraine (UL)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
0209 industrial biotechnology
Materials science
Bifurcation and imperfection approaches
[PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph]
Context (language use)
02 engineering and technology
engineering.material
Plasticity
Elastomer
Sciences de l'ingénieur
Industrial and Manufacturing Engineering
[SPI.MAT]Engineering Sciences [physics]/Materials
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]
[SPI]Engineering Sciences [physics]
020901 industrial engineering & automation
0203 mechanical engineering
Coating
[PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph]
Formability prediction
Substrate-supported metals
Formability
Composite material
Ductility
Metals and Alloys
[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]
Computer Science Applications
020303 mechanical engineering & transports
Modeling and Simulation
engineering
Ceramics and Composites
Non-associated plasticity
Layer (electronics)
Necking
Zdroj: Journal of Materials Processing Technology
Journal of Materials Processing Technology, Elsevier, 2021, 287, pp.116694. ⟨10.1016/j.jmatprotec.2020.116694⟩
ISSN: 0924-0136
DOI: 10.1016/j.jmatprotec.2020.116694⟩
Popis: International audience; When manufacturing flexible devices, it is quite common that localized necking appears due to the low ductility of the metal sheets used. To delay the inception of such localized necking, several industrial companies have proposed a promising technical solution based on the bonding of elastomer substrates to the metal sheets used in the manufacturing processes. In this context, the comprehensive numerical understanding of the impact of such substrate coating on the improvement of the ductility of elastomer-supported metal layers still remains a challenging goal. To achieve this goal, the bifurcation approach as well as the Marciniak and Kuczynski model are used to predict the occurrence of localized necking. The mechanical behavior of the metal layer is modeled by a non-associated anisotropic plasticity model. The adoption of non-associated plastic flow rule allows separating the description of the plastic potential from that of the yield function, which is essential to accurately model strong plastic anisotropy characterizing cold-rolled sheets. As to the elastomer substrate, its mechanical behavior is described by a neo-Hookean law. The paper presents a variety of numerical results relating to the prediction of plastic strain localization in both freestanding and elastomercoated metal layers. The effects of the non-associativity of the plastic flow rule for the metal layer and the addition of an elastomer substrate on the predictions of localized necking are especially underlined. It is shown that the ductility limits predicted by the non-associated elasto-plastic model are lower than their counterparts determined by an associated plasticity model. It is also proven that adhering an elastomer layer to the metal layer can substantially delay the initiation of plastic strain localization.
Databáze: OpenAIRE
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