|
Advances in Aircraft and Spacecraft Science Volume 9, Number 3, May 2022 , pages 217-242 DOI: https://doi.org/10.12989/aas.2022.9.3.217 |
||
|
A micromechanics-based time-domain viscoelastic constitutive model for particulate composites: Theory and experimental validation |
||
Hangil You, Hyoung Jun Lim and Gun Jin Yun
|
||
| Abstract | ||
| This paper proposes a novel time-domain homogenization model combining the viscoelastic constitutive law with Eshelby's inclusion theory-based micromechanics model to predict the mechanical behavior of the particle reinforced composite material. The proposed model is intuitive and straightforward capable of predicting composites' viscoelastic behavior in the time domain. The isotropization technique for non-uniform stress-strain fields and incremental Mori-Tanaka schemes for high volume fraction are adopted in this study. Effects of the imperfectly bonded interphase layer on the viscoelastic behavior on the dynamic mechanical behavior are also investigated. The proposed model is verified by the direct numerical simulation and DMA (dynamic mechanical analysis) experimental results. The proposed model is useful for multiscale analysis of viscoelastic composite materials, and it can also be extended to predict the nonlinear viscoelastic response of composite materials. | ||
| Key Words | ||
| Eshelby inclusion theory; homogenization; micromechanics; particulate composite; viscoelastic material | ||
| Address | ||
| Hangil You, Hyoung Jun Lim: Department of Aerospace Engineering, Seoul National University, Gwanak-gu, Seoul, 08826, South Korea Gun Jin Yun: Department of Aerospace Engineering, Seoul National University, Gwanak-gu, Seoul, 08826, South Korea; Institute of Advanced Aerospace Technology, Seoul National University, 08826, Seoul, South Korea | ||
