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

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Vogler, M (Author) Other; Rolfes, R (Author) Other; Camanho, PP (Author) FEUP

Journal

Title: Mechanics of Materials

Vol. 59

Pages: 50-64

ISSN: 0167-6636

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 118 Citations

Scopus - 147 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15