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, L. P. Mikkelsen, L. J. Sluys

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)
30 Downloads (Pure)


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 friction. A comparison between numerical and experimental results is performed.

Original languageEnglish
Pages (from-to)407-419
Number of pages13
JournalEuropean Journal of Mechanics, A/Solids
Publication statusPublished - 1 Jan 2019


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


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