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Volume 4, Number 1, March 2022 , pages 1-21 DOI: https://doi.org/10.12989/cme.2022.4.1.001 |
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A hierarchical micromechanics model for nonlinear behavior with damage of SMC composites with wavy fiber |
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Fei-Yan Zhu, Hyoung Jun Lim, Hoil Choi and Gun Jin Yun
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| Abstract | ||
| This paper presents a novel hierarchical micromechanics model to simulate Sheet Molding Compound (SMC) composites with wavy fibers. The three-step homogenizations are integrated to calculate the effective properties of SMC chips, layers, and composites, respectively. During homogenization, it has a unique capability of modeling the wavy fibers within fiber chips through a rotational transformation. The orientation and overlapping of the fiber chips caused by the manufacturing process are considered through the proposed multi-site (MS) micromechanics model. Furthermore, J2 plasticity and Lemaitre-Chaboche ductile damage models are adopted to estimate the nonlinear behavior of SMC composites. The nonlinear behavior of SMC composites is predicted based on the concurrent simulations at each homogenization. The comparison with results from experiments and the literature validates the proposed hierarchical model. Finally, a parametric study investigates the effects of fiber waviness and chip orientation on the effective behavior of SMC composites. | ||
| Key Words | ||
| fiber waviness; Mori-Tanaka; multiscale modeling; random distribution; sheet molding compound | ||
| Address | ||
| Fei-Yan Zhu: Department of Aerospace Engineering, Seoul National University, Gwanak-gu, Seoul, 08826, Korea Hyoung Jun Lim: Department of Aerospace Engineering, Seoul National University, Gwanak-gu, Seoul, 08826, Korea Hoil Choi: Department of Aerospace Engineering, Seoul National University, Gwanak-gu, Seoul, 08826, Korea Gun Jin Yun: Department of Aerospace Engineering, Seoul National University, Gwanak-gu, Seoul, 08826, Korea; Institute of Advanced Aerospace Technology, Seoul National University, Gwanak-gu, Seoul, 08826, Korea | ||
