A blended continuum damage and fracture mechanics method for progressive damage analysis of composite structures using XFEM

A blended continuum damage and fracture mechanics method for progressive damage analysis of... Progressive damage analysis of composite structures remains problematic, holding back the full potential of these materials. Widely used continuum damage models feature a heuristical stiffness reduction to reflect damage, resulting in an unrealistic representation of damage patterns. To the end of a more realistic failure representation, this paper proposes a blended methodology for progressive damage analysis of such structures implemented in ABAQUS, combining continuum damage models with a more physically based approach from a fracture mechanics perspective. Matrix cracks are modelled through the eXtended Finite Element Method and delaminations through a cohesive zone model. Validation of the blend on an experimental campaign of open-hole tensile tests shows remarkable predictive capability, in good conformance to experimental failure loads, digital image correlation and acoustic emission measurements - particularly yielding more realistic damage patterns than state-of-the-art continuum damage model implementations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Composite Structures Elsevier

A blended continuum damage and fracture mechanics method for progressive damage analysis of composite structures using XFEM

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0263-8223
eISSN
1879-1085
D.O.I.
10.1016/j.compstruct.2017.10.007
Publisher site
See Article on Publisher Site

Abstract

Progressive damage analysis of composite structures remains problematic, holding back the full potential of these materials. Widely used continuum damage models feature a heuristical stiffness reduction to reflect damage, resulting in an unrealistic representation of damage patterns. To the end of a more realistic failure representation, this paper proposes a blended methodology for progressive damage analysis of such structures implemented in ABAQUS, combining continuum damage models with a more physically based approach from a fracture mechanics perspective. Matrix cracks are modelled through the eXtended Finite Element Method and delaminations through a cohesive zone model. Validation of the blend on an experimental campaign of open-hole tensile tests shows remarkable predictive capability, in good conformance to experimental failure loads, digital image correlation and acoustic emission measurements - particularly yielding more realistic damage patterns than state-of-the-art continuum damage model implementations.

Journal

Composite StructuresElsevier

Published: Jan 15, 2018

References

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