Modeling the inelastic deformation and fracture of polymer composites - Part I: Plasticity model

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Vogler, M (Autor) Outra; Rolfes, R (Autor) Outra; Camanho, PP (Autor) FEUP

Revista

Título: Mechanics of Materials

Vol. 59

Páginas: 50-64

ISSN: 0167-6636

Editora: Elsevier

Indexação

ISI Web of Knowledge - 118 Citações

Scopus - 147 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-005-2B7

DOI: 10.1016/j.mechmat.2012.12.002

Abstract (EN): A new transversely-isotropic elastic-plastic constitutive model for unidirectional fiber reinforced polymers (FRP) is presented. The model is able to represent the fully nonlinear mechanical behavior under multi-axial loading conditions and under triaxial stress states prior to the onset of cracking. Since associated flow rules often give a wrong prediction of plastic Poisson coefficients, a non-associated flow rule is introduced to provide realistic predictions of the volumetric plastic strains. This paper focusses on the simulation of triaxiality dependent plasticity based nonlinearities of FRP until failure occurs. The onset and propagation of failure is predicted by a new smeared crack model presented in an accompanying paper (Camanho et al., 2012). In order to demonstrate the capabilities of the new material model, a yield surface parameter identification for IM7-8552 carbon epoxy is presented and simulations of quasi-static transverse and off-axis compression tests and of uniaxial compression tests superimposed with various values of hydrostatic pressure are shown as a model verification.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 15