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The effect of voids on matrix cracking in composite laminates as revealed by combined computations at the micro- and meso-scales

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)180-192
Number of pages13
JournalComposites Part A: Applied Science and Manufacturing
Volume117
Early online date10 Nov 2018
DOIs
DateAccepted/In press - 9 Nov 2018
DateE-pub ahead of print - 10 Nov 2018
DatePublished (current) - Feb 2019

Abstract

Voids are an important type of manufacturing defects in fiber-reinforced composites. Matrix cracking is sensitive to the presence of voids. Although this cracking occurs at the ply scale, its dynamics is strongly affected by ply's microstructure, in particular, fiber distribution, fiber content, and the presence of voids. In the current study, a computational approach to simulate the influence of intra-laminar voids on cracking in composite laminates is developed. The approach combines finite element models of two scales: a micro-scale model, where the fibers and voids are modeled explicitly, and a meso-scale model, where the cracking phenomenon is captured on the ply scale. The micro-scale model, incorporating plasticity and damage in the matrix, provides input for the meso-scale model, which simulates the progressive cracking by means of the extended finite element method. The methodology is applied to investigate the effect of voids on the density of transverse cracks in cross-ply laminates in function of the quasi-static tensile load. Different sizes and contents of voids, which are chosen based on experimental micro-computed tomography data, are simulated. The numerical experiments show that the presence of voids leads to earlier start of the cracking, with the crack density evolution less sensitive to voids.

    Research areas

  • B. Porosity, B. Transverse cracking, C. Finite element analysis (FEA), Multiscale modeling

Documents

Documents

  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at https://www.sciencedirect.com/science/article/pii/S1359835X18304421 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 2 MB, PDF document

    Licence: CC BY-NC-ND

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