Abstract
A total of 18 Fe-SMA notched round bars were tested to study their monotonic and low-cycle fatigue (LCF) fracture behavior, followed by FE simulation to calibrate necessary parameters for void-growth-model (VGM) and cyclic-void-growth model (CVGM). Subsequently, Fe-SMA shear-panel-type and bar-type dampers are considered for further validation. The CVGM is shown to predict the LCF fracture of these Fe-SMA dampers with good accuracy under large strain amplitudes, but may underestimate their LCF resistance under small strain amplitude. A phenomenological modified CVGM is developed to provide a more accurate and consistent fracture prediction for Fe-SMA under a spectrum of strain amplitudes.
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