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Interface Cohesive Elements to Model Matrix Crack Evolution in Composite Laminates

Applied Composite Materials volume 21, pages 57–70 (2014)Cite this article

Abstract

In this paper, the transverse matrix (resin) cracking developed in multidirectional composite laminates loaded in tension was numerically investigated by a finite element (FE) model implemented in the commercially available software Abaqus/Explicit 6.10. A theoretical solution using the equivalent constraint model (ECM) of the damaged laminate developed by Soutis et al. was employed to describe matrix cracking evolution and compared to the proposed numerical approach. In the numerical model, interface cohesive elements were inserted between neighbouring finite elements that run parallel to fibre orientation in each lamina to simulate matrix cracking with the assumption of equally spaced cracks (based on experimental measurements and observations). The stress based traction-separation law was introduced to simulate initiation of matrix cracking and propagation under mixed-mode loading. The numerically predicted crack density was found to depend on the mesh size of the model and the material fracture parameters defined for the cohesive elements. Numerical predictions of matrix crack density as a function of applied stress are in a good agreement to experimentally measured and theoretically (ECM) obtained values, but some further refinement will be required in near future work.

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Authors and Affiliations

  1. Department of Mechanical Engineering, The University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK

    Y. Shi & C. Pinna

  2. Aerospace Research Institute, The University of Manchester, Sackville Street, Manchester, M13 9PL, UK

    C. Soutis

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  1. Y. Shi
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  2. C. Pinna
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  3. C. Soutis
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Correspondence to C. Soutis.

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Shi, Y., Pinna, C. & Soutis, C. Interface Cohesive Elements to Model Matrix Crack Evolution in Composite Laminates. Appl Compos Mater 21, 57–70 (2014). https://doi.org/10.1007/s10443-013-9349-0

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  • DOI: https://doi.org/10.1007/s10443-013-9349-0

Keywords

  • Composite laminates
  • Finite element analysis
  • Cohesive elements
  • Crack density
  • Equivalent constraint model
  • Damage
  • Matrix cracking