Abstract
In this work, the effect of thermomechanical coupling on stress-induced martensitic phase transformation around the crack tip of a pseudoelastic NiTi SMA compact tension (CT) specimen is studied experimentally and numerically. Six CT specimens are tested under different loading rates and the temperature distributions around the crack tip are measured using an infrared camera. For the numerical evaluation of temperature field and phase transformation, extended thermo-mechanically-coupled ZM (Zaki–Moumni) model is implemented into ABAQUS. The results of temperature field show that experimental and simulation results of temperature show a good agreement, and the maximum temperature at the crack tip increases with loading frequency. Furthermore, numerical results show that the phase transformation region size decreases when the loading frequency increases.
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Acknowledgements
Yajun You would like to acknowledge CSC (China Scholarship Council, 201706290149) for their financial support. Ziad Moumni would like to acknowledge SAFEA (State Administration of Foreign Expert of China) for their financial support. This work is also supported by National Nature Science Foundation of China (11432011, 11620101002) and by the Fundamental Research Funds for the Central Universities (G2018KY0301).
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You, Y., Gu, X., Zhang, Y. et al. Effect of thermomechanical coupling on stress-induced martensitic transformation around the crack tip of edge cracked shape memory alloy. Int J Fract 216, 123–133 (2019). https://doi.org/10.1007/s10704-019-00346-0
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DOI: https://doi.org/10.1007/s10704-019-00346-0