Numerical modeling of uneven thermoplastic polymers behaviour using experimental stress-strain data and pressure dependent von Mises yield criteria to improve design practices

Página do item simplificado
dc.contributor.authorDonato G.H.B.
dc.contributor.authorBianchi M.
dc.date.accessioned2019-08-20T00:13:16Z
dc.date.available2019-08-20T00:13:16Z
dc.date.issued2011
dc.description.abstractClassical plasticity theories and yield criteria for ductile materials, such as Tresca and von Mises original formulations predict that yielding is independent on the hydrostatic stress state (pressure), which means that tensile and compressive stress-strain behaviours are considered equal and are equally treated. This approach is reasonable for ductile metallic materials but sometimes inaccurate for polymers, which commonly present larger compressive yield strength, therefore being characterized as uneven. Polymer unevenness can be of great interest for mechanical structural design since components that present regions operating under compression can be optimized taking this phenomenon into account. Compressive stress-strain data for polymers are very scarce in the literature, and as a step in this direction this work presents three key-activities: i) four selected polymers were tested under tension and compression to identify unevenness and assess its levels; ii) pressure dependent yield criteria applicable for polymers were briefly reviewed; iii) experimental results were incorporated in adapted design practices using modified yield criteria implemented in optimization and finite element computations. Results show that taking unevenness into account and implementing modified criteria in the numerical techniques for structural calculation can provide mass reductions up to ∼ 38% even with simple geometric changes, while keeping original safety and stiffness levels. © 2011 Published by Elsevier Ltd.
dc.description.firstpage1871
dc.description.lastpage1876
dc.description.volume10
dc.identifier.citationDONATO, Gustavo; Bianchi, Marcos. Numerical modeling of uneven thermoplastic polymers behaviour using experimental stress-strain data and pressure dependent von Mises yield criteria to improve design practices. Procedia Engineering, v. 10, p. 1871-1876, 2011.
dc.identifier.doi10.1016/j.proeng.2011.04.311
dc.identifier.issn1877-7058
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/2011
dc.relation.ispartofProcedia Engineering
dc.rightsAcesso Aberto
dc.subject.otherlanguageExperimental testing
dc.subject.otherlanguagePressure dependent yield criteria
dc.subject.otherlanguageStructural improvement
dc.subject.otherlanguageUneven polymers
dc.titleNumerical modeling of uneven thermoplastic polymers behaviour using experimental stress-strain data and pressure dependent von Mises yield criteria to improve design practices
dc.typeArtigo de evento
fei.scopus.citations10
fei.scopus.eid2-s2.0-80052924196
fei.scopus.subjectCompressive stress strains
fei.scopus.subjectExperimental testing
fei.scopus.subjectFinite element computations
fei.scopus.subjectHydrostatic stress state
fei.scopus.subjectStructural calculations
fei.scopus.subjectStructural improvements
fei.scopus.subjectTension and compression
fei.scopus.subjectYield criteria
fei.scopus.updated2024-05-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80052924196&origin=inward
Arquivos
Coleções
Artigos