Details
| Original language | English |
|---|---|
| Pages (from-to) | 186-199 |
| Number of pages | 14 |
| Journal | Composites Part A: Applied Science and Manufacturing |
| Volume | 90 |
| Early online date | 21 Jun 2016 |
| Publication status | Published - Nov 2016 |
Abstract
This paper presents the development of a new fully-coupled thermo-mechanical invariant-based elasto-plastic constitutive model for short fiber reinforced composites (SFRPs). The invariant-based character of the current formulation under quasi-static multiaxial loading conditions allows the incorporation of the anisotropic (transversely isotropic) response of these materials, which results from the employed injection molding process for their production. From the modeling point of view, the thermo-mechanical nonlinear behavior of these materials is performed through the definition of a thermal-dependent anisotropic yield surface and a non-associative plastic potential function. This novel coupled formulation is accordingly derived and implemented into the FE code FEAP by means of the user capability UEL, i.e. the constitutive model is integrated within an user-defined element. The performance of the model is first assessed using a set of benchmark computations, and subsequently validated with available experimental data, showing the potential applicability of the proposed formulation.
Keywords
- A. Finite element method (FEM), B. Short fiber reinforced thermoplastics, C. Thermo-mechanical coupling, D. Transversely isotropic thermo-plasticity
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- Mechanics of Materials
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In: Composites Part A: Applied Science and Manufacturing, Vol. 90, 11.2016, p. 186-199.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An invariant-based anisotropic material model for short fiber-reinforced thermoplastics
T2 - Coupled thermo-plastic formulation
AU - Dean, A.
AU - Reinoso, J.
AU - Sahraee, S.
AU - Rolfes, R.
N1 - Funding information: The material identification of the anisotropic yield surface was carried out based on the data at room temperature obtained by IFUM (Institute of Forming Technology and Machines, Leibniz Universität Hannover, Germany) within the consortium of the project SPP1640 “Joining by plastic deformation”, funded by the German Research Foundation (DFG). Then, before performing the simulations and incorporating the material hardening data, a precheck with regard to the consistency and convexity of the yield surface at different thermo-mechanical loadings was performed, see Fig. 5 . In this graph, it can be seen the adequate convex form of the yield surface, which was obtained during the characterization phase at room temperature (since no material data were available at different temperatures for this specific material). The authors would like to acknowledge to Dr.-Ing. Matthias Vogler for many helpful comments and discussions. RR, SS and AD acknowledge the German Research Foundation (DFG) for the financial support through the priority program 1640 joining by plastic deformation with contract No. RO 706/6-1. JR gratefully acknowledges the Spanish Ministry of Economy and Competitiveness/FEDER ( DPI2012-37187 ) and the Andalusian Government (Projects of Excellence No. TEP-7093 and P12-TEP-1050).
PY - 2016/11
Y1 - 2016/11
N2 - This paper presents the development of a new fully-coupled thermo-mechanical invariant-based elasto-plastic constitutive model for short fiber reinforced composites (SFRPs). The invariant-based character of the current formulation under quasi-static multiaxial loading conditions allows the incorporation of the anisotropic (transversely isotropic) response of these materials, which results from the employed injection molding process for their production. From the modeling point of view, the thermo-mechanical nonlinear behavior of these materials is performed through the definition of a thermal-dependent anisotropic yield surface and a non-associative plastic potential function. This novel coupled formulation is accordingly derived and implemented into the FE code FEAP by means of the user capability UEL, i.e. the constitutive model is integrated within an user-defined element. The performance of the model is first assessed using a set of benchmark computations, and subsequently validated with available experimental data, showing the potential applicability of the proposed formulation.
AB - This paper presents the development of a new fully-coupled thermo-mechanical invariant-based elasto-plastic constitutive model for short fiber reinforced composites (SFRPs). The invariant-based character of the current formulation under quasi-static multiaxial loading conditions allows the incorporation of the anisotropic (transversely isotropic) response of these materials, which results from the employed injection molding process for their production. From the modeling point of view, the thermo-mechanical nonlinear behavior of these materials is performed through the definition of a thermal-dependent anisotropic yield surface and a non-associative plastic potential function. This novel coupled formulation is accordingly derived and implemented into the FE code FEAP by means of the user capability UEL, i.e. the constitutive model is integrated within an user-defined element. The performance of the model is first assessed using a set of benchmark computations, and subsequently validated with available experimental data, showing the potential applicability of the proposed formulation.
KW - A. Finite element method (FEM)
KW - B. Short fiber reinforced thermoplastics
KW - C. Thermo-mechanical coupling
KW - D. Transversely isotropic thermo-plasticity
UR - http://www.scopus.com/inward/record.url?scp=84978239587&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2016.06.015
DO - 10.1016/j.compositesa.2016.06.015
M3 - Article
AN - SCOPUS:84978239587
VL - 90
SP - 186
EP - 199
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
SN - 1359-835X
ER -