PDF] Investigation on the Cyclic Response of Superelastic Shape Memory Alloy (SMA) Slit Damper Devices Simulated by Quasi-Static Finite Element (FE) Analyses

It can be shown that SMA slit dampers exhibit many structural advantages in terms of ultimate strength, moderate energy dissipation and recentering capability. In this paper, the superelastic shape memory alloy (SMA) slit damper system as an alternative design approach for steel structures is intended to be evaluated with respect to inelastic behavior simulated by refined finite element (FE) analyses. Although the steel slit dampers conventionally used for aseismic design are able to dissipate a considerable amount of energy generated by the plastic yielding of the base materials, large permanent deformation may occur in the entire structure. After strong seismic events, extra damage repair costs are required to restore the original configuration and to replace defective devices with new ones. Innovative slit dampers fabricated by superelastic SMAs that automatically recover their initial conditions only by the removal of stresses without heat treatment are introduced with a view toward mitigating the problem of permanent deformation. The cyclically tested FE models are calibrated to experimental results for the purpose of predicting accurate behavior. This study also focuses on the material constitutive model that is able to reproduce the inherent behavior of superelastic SMA materials by taking phase transformation between austenite and martensite into consideration. The responses of SMA slit dampers are compared to those of steel slit dampers. Axial stress and strain components are also investigated on the FE models under cyclic loading in an effort to validate the adequacy of FE modeling and then to compare between two slit damper systems. It can be shown that SMA slit dampers exhibit many structural advantages in terms of ultimate strength, moderate energy dissipation and recentering capability.

PDF) The Effect of slit-friction hybrid damper on the Performance of Dual System

PDF) STRUCTURAL APPLICATIONS OF SHAPE MEMORY ALLOYS FOR SEISMIC RESILIENCE ENHANCEMENT

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PDF] Investigation on the Cyclic Response of Superelastic Shape Memory Alloy (SMA) Slit Damper Devices Simulated by Quasi-Static Finite Element (FE) Analyses

PDF] Investigation on the Cyclic Response of Superelastic Shape Memory Alloy (SMA) Slit Damper Devices Simulated by Quasi-Static Finite Element (FE) Analyses

Evaluating the Effectiveness of a Shape Memory Alloy on a Connection Equipped with Slit Damper

PDF) Investigation on the Cyclic Response of Superelastic Shape Memory Alloy (SMA) Slit Damper Devices Simulated by Quasi-Static Finite Element (FE) Analyses

Smart materials in architecture for actuator and sensor applications: A review - Martin Sobczyk, Sebastian Wiesenhütter, Jörg Rainer Noennig, Thomas Wallmersperger, 2022

PDF) Self-Centering Shape Memory Alloy-Viscoelastic Hybrid Braces for Seismic Resilience

i THERMOMECHANICAL CHARACTERIZATION OF ONE-WAY SHAPE MEMORY NITINOL AS AN ACTUATOR FOR ACTIVE SURGICAL NEEDLE A Dissertation Su

PDF) Investigation on the Cyclic Response of Superelastic Shape Memory Alloy (SMA) Slit Damper Devices Simulated by Quasi-Static Finite Element (FE) Analyses

Evaluating the Effectiveness of a Shape Memory Alloy on a Connection Equipped with Slit Damper

PDF) STRUCTURAL APPLICATIONS OF SHAPE MEMORY ALLOYS FOR SEISMIC RESILIENCE ENHANCEMENT

PDF] Investigation on the Cyclic Response of Superelastic Shape Memory Alloy (SMA) Slit Damper Devices Simulated by Quasi-Static Finite Element (FE) Analyses

Full article: Multiparameter Optimization Design of Self-centering Friction Damper Using Shape Memory Alloy Bars