A numerical micro-mechanical study on damage induced by the curing process in carbon/epoxy unidirectional material
| Autor: | Enrico Panettieri, Federico Danzi, M.C. Mancino, Daniele Fanteria |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Quantitative Biology::Tissues and Organs Constitutive equation Finite element analysis Micromechanics Epoxy Polymer matrix composites Transverse plane Curing cycle Matrix cracking Ceramics and Composites Civil and Structural Engineering visual_art Ultimate tensile strength visual_art.visual_art_medium Composite material Curing (chemistry) Shrinkage Network model |
| Zdroj: | Composite Structures. 210:755-766 |
| ISSN: | 0263-8223 |
| DOI: | 10.1016/j.compstruct.2018.11.059 |
| Popis: | A numerical framework for the determination of the damage, the stress and the inelastic strain field induced by the curing process for unidirectional carbon/epoxy composite material is proposed. The approach integrates a network model for the estimation of the matrix shrinkage and elastic properties evolution during curing with damageable elasto-plastic constitutive equations. Simulations of the curing process and of the cured material transverse mechanical response are carried out. A sensitivity study is realised for different volume fractions and matrix tensile strengths for single fiber models. Analyses of Representative Volume Elements (RVEs) with randomly distributed fibers are also performed and a comparison with the ideally cured version of the same model is used to highlight the importance of considering the curing process effects in micromechanical models. The proposed framework, with a proper calibration of the constituents, contributes to the enhancement of the fidelity of numerical micromechanics for this class of materials. |
| Databáze: | OpenAIRE |
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