期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 90, 期 -, 页码 186-199出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2016.06.015
关键词
Finite element method (FEM); Short fiber reinforced thermoplastics; Thermo-mechanical coupling; Transversely isotropic thermo-plasticity
资金
- German Research Foundation (DFG) [1640, RO 706/6-1]
- Spanish Ministry of Economy and Competitiveness/FEDER [DPI2012-37187]
- Andalusian Government [TEP-7093, P12-TEP-1050]
This paper presents the development of a new fully-coupled thermo-mechanical invariant-based elastoplastic 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 non-linear 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. (C) 2016 Elsevier Ltd. All rights reserved.
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