An adapting cohesive approach for crack-healing analysis in SMA fiber-reinforced composites

In this study, a varying/adapting cohesive approach is developed to model crack-healing procedure in reinforced shape memory composites. To this aim, the stress–strain behavior of SMA fiber in thermo-mechanical condition is converted into a traction–separation response between crack faces. The exten...

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Bibliographic Details
Published in:Computer methods in applied mechanics and engineering 2019-06, Vol.349, p.550-575
Main Authors: Karimi, M., Bayesteh, H., Mohammadi, S.
Format: Article
Language:English
Subjects:
Cohesive
Composite
Computer simulation
Crack propagation
Fiber composites
Finite element method
Healing
Propagation
Propagation modes
Self-healing
Separation
Shape memory
Shape memory alloy
Strain
Traction
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Summary:In this study, a varying/adapting cohesive approach is developed to model crack-healing procedure in reinforced shape memory composites. To this aim, the stress–strain behavior of SMA fiber in thermo-mechanical condition is converted into a traction–separation response between crack faces. The extended finite element formulation is employed to model crack in reinforced composites and to avoid remeshing while maintaining the required accuracy of results. Combination of XFEM to model arbitrary crack and traction–separation formulation enables the model to simulate mixed-mode crack propagation and crack-healing with different fiber orientations. Examining the results shows that the proposed model maintains the precision of direct modeling of SMA fibers while decreasing the computational costs and complexity of modeling significantly.
ISSN:0045-7825
1879-2138
DOI:10.1016/j.cma.2019.02.019