A combined experimental/numerical investigation on hygrothermal aging of fiber-reinforced composites

I.B.C.M. Rocha*, F.P. van der Meer, S. Raijmaekers, F. Lahuerta, R.P.L. Nijssen, Lars Pilgaard Mikkelsen, L.J. Sluys

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

This work investigates hygrothermal aging degradation of unidirectional glass/epoxy composite specimens through a combination of experiments and numerical modeling. Aging is performed through immersion in demineralized water. Interlaminar shear testes are performed after multiple conditioning times and after single immersion/redrying cycles. Degradation of the fiber-matrix interface is estimated using single-fiber fragmentation tests and reverse modeling combining analytical and numerical models. A fractographic analysis of specimens aged at 50°C and 65°C is performed through X-ray computed tomography. The aging process is modeled using a numerical framework combining a diffusion analysis with a concurrent multiscale model with embedded hyper-reduced micromodels. At the microscale, a pressure-dependent viscoelastic/viscoplastic model with damage is used for the resin and fiber-matrix debonding is modeled with a cohesive-zone model including samples redried after havingfriction. A comparison between numerical and experimental results is performed.
Original languageEnglish
JournalEuropean Journal of Mechanics A - Solids
Volume73
Pages (from-to)407-419
ISSN0997-7538
DOIs
Publication statusPublished - 2018

Keywords

  • Fiber-reinforced composites
  • Multiscale analysis
  • Reduced-order modeling

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