Abstract
In this chapter, the damage evolution law and fatigue life prediction models are proposed for NiTi SMAs by addressing their superelasticity and shape memory effect, respectively. The proposed damage evolution law considered the damage coming from the microcrack orientation, propagation, martensite transformation, and martensite reorientation, and then reasonably reflected the damage accumulation process under the uniaxial, torsional, and multiaxial cyclic loadings. Moreover, the fatigue life prediction models based on the damage evolution law are also proposed, the predictive results for the uniaxial and multiaxial fatigue tests are all located within twice error band, and the accuracy of such models is much higher than those of the semiempirical ones.
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Kang, G., Yu, C., Kan, Q. (2023). Fatigue Life-Prediction Models of NiTi SMAs. In: Thermo-Mechanically Coupled Cyclic Deformation and Fatigue Failure of NiTi Shape Memory Alloys. Springer Series in Materials Science, vol 335. Springer, Singapore. https://doi.org/10.1007/978-981-99-2752-4_7
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DOI: https://doi.org/10.1007/978-981-99-2752-4_7
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