Micro-CT image-based computation of effective thermal and mechanical properties of fibrous porous materials

Donglai Liu, Hailong Chen, Luis A. Chacon, Vijay Mohan Ramu, Savio J. Poovathingal

Research output: Contribution to journalArticlepeer-review

Abstract

Fibrous porous materials are extensively employed as heat shielding material for space vehicles and capsules. To predict the performance of these materials using computational modeling at the vehicle/capsule scale, the effective material properties are needed. In this work, the effective thermal conductivity and elastic constants of a carbon fibrous porous material called FiberForm (precursor of PICA) were calculated using a direct image-based approach. In this image-based approach, the microstructures obtained using X-ray computed tomography technique are represented as binary voxel data. Nonlocal interactions are introduced between neighboring voxels. Integro-differential equations, with respect to spatial and temporal dimensions respectively, are developed to govern material thermal and mechanical behaviors. Using this approach, energy-based computational procedures were developed to calculate the effective material properties of fibrous and porous materials irrespective of the periodicity of underlying microstructures. The size of representative volume element was determined by convergence of effective properties with respect to microstructure size.

Original languageEnglish
Article number111502
JournalComposites Part B: Engineering
Volume281
DOIs
StatePublished - Jul 15 2024

Bibliographical note

Publisher Copyright:
© 2024

Keywords

  • Computational homogenization
  • Effective material properties
  • FiberForm
  • Micro-CT image-based modeling

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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