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A micromechanics-based time-domain viscoelastic constitutive model for particulate composites: Theory and experimental validation

  • You, Hangil (Department of Aerospace Engineering, Seoul National University) ;
  • Lim, Hyoung Jun (Department of Aerospace Engineering, Seoul National University) ;
  • Yun, Gun Jin (Department of Aerospace Engineering, Seoul National University)
  • Received : 2022.02.09
  • Accepted : 2022.05.18
  • Published : 2022.05.25
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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.

Keywords

Acknowledgement

This work was supported by the Institute of Engineering Research of Seoul National University, and U.S. Air Force Office of Scientific Research under award number FA2386-20-1-4067. Authors are grateful for the supports.

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