A method for the computational assessment of the damping performance of shape-memory alloys

A strategy is proposed for the dynamic analysis and assessment of the vibration-damping potential of shape-memory alloys attached to mechanical structures. The amplitude-dependent modal properties are directly computed using the concept of nonlinear modes. This approach explicitly takes into account the variation of the mode shape and the multiharmonic character of the vibration behavior. The methodology is exemplified for an axially vibrating rod. A phenomenological model was used to describe the pseudoelastic material behavior. The frequency-dependent model parameters were identified from measurements. (paper)