Abstract
The problem of an interface crack between a shape memory alloy and an elastic layer is numerically addressed. The shape memory alloy behavior is modeled with a continuum thermodynamics based constitutive model embedded within the finite element method. With the help of the boundary layer approach, and the assumption of small scale transformation zone, the K-dominated region in the tip of the interface crack is loaded under general mixed-mode condition. Both slow and fast loading rates are considered to study the effects of thermo-mechanical coupling on the interface crack tip fields, especially the crack tip energy release rate within a history-dependent J-integral framework, the stress/strain curve during the loading process, and the shape and size of the transformation zone and the heated zone. A special effort is made to investigate how changing the rate of applied loading, the mode-mixity, and the material properties of SMA and elastic layer modify the crack tip fields.
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The authors wish to acknowledge the technical support of the High Performance Computing Lab, School of Civil Engineering, University of Tehran. The financial support of Iran National Science Foundation (INSF) is gratefully acknowledged.
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Afshar, A., Hatefi Ardakani, S., Hashemi, S. et al. Numerical analysis of crack tip fields in interface fracture of SMA/elastic bi-materials. Int J Fract 195, 39–52 (2015). https://doi.org/10.1007/s10704-015-0047-9
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DOI: https://doi.org/10.1007/s10704-015-0047-9