Details
| Original language | English |
|---|---|
| Pages (from-to) | 50-64 |
| Number of pages | 15 |
| Journal | Mechanics of materials |
| Volume | 59 |
| Publication status | Published - 20 Dec 2012 |
Abstract
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.
Keywords
- Anisotropy, Constitutive modeling, High pressure effects, Plasticity, Polymer-matrix composites (PMCs)
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Instrumentation
- Engineering(all)
- Mechanics of Materials
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In: Mechanics of materials, Vol. 59, 20.12.2012, p. 50-64.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Modeling the inelastic deformation and fracture of polymer composites - Part I
T2 - Plasticity model
AU - Vogler, M.
AU - Rolfes, R.
AU - Camanho, P. P.
PY - 2012/12/20
Y1 - 2012/12/20
N2 - 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.
AB - 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.
KW - Anisotropy
KW - Constitutive modeling
KW - High pressure effects
KW - Plasticity
KW - Polymer-matrix composites (PMCs)
UR - http://www.scopus.com/inward/record.url?scp=84872371958&partnerID=8YFLogxK
U2 - 10.1016/j.mechmat.2012.12.002
DO - 10.1016/j.mechmat.2012.12.002
M3 - Article
AN - SCOPUS:84872371958
VL - 59
SP - 50
EP - 64
JO - Mechanics of materials
JF - Mechanics of materials
SN - 0167-6636
ER -