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Ji, Wooseok
Composite Materials and Structures Lab
Research Interests
  • Mechanics of composites
  • In situ experiments
  • Fracture mechanics
  • Computational solid mechanics
  • Advanced finite element methods
  • Static and dynamic stability of structures

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Thermal conductivity of a thick 3D textile composite using an RVE model with specialized thermal periodic boundary conditions

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Title
Thermal conductivity of a thick 3D textile composite using an RVE model with specialized thermal periodic boundary conditions
Author
Kim, Hye-gyuJi, Wooseok
Issue Date
2021-03
Publisher
IoP Institute of Physics
Citation
Functional Composites and Structures, v.3, no.1, pp.015002
Abstract
Finite element analysis is performed to virtually measure homogenized thermal conductivity of a thick 3D woven textile composite (T3DWC). Temperature-dependent thermal and mechanical properties of constituents are considered for the measurements over a wide range of temperature. A two-step homogenization approach is adopted here to simplify the analysis at the microscopic level without losing heterogeneity of the material at the macroscopic scale. First-step homogenization is carried out at a tow level using an analytical homogenization scheme. Fiber tows are homogenized and assigned with effective elastic and thermal properties. The solid tows are then implemented into a representative volume element considering the unique in-plane periodic fiber architecture of the thick composite material. Due to the unique in-plane periodicity, conventional periodic boundary conditions for thermal and mechanical loading conditions are reformulated. Anisotropic thermal conductivity of T3DWC is obtained from the second-step homogenization based on virtual thermal tests performed at ambient to elevated temperatures.
URI
https://scholarworks.unist.ac.kr/handle/201301/52538
URL
https://iopscience.iop.org/article/10.1088/2631-6331/abd7cd
DOI
10.1088/2631-6331/abd7cd
ISSN
2631-6331
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