Study on Temperature Mechanical Properties of SMA-MR Material Dampers

Against the background of the research on the performance of dampers for a certain type of spacecraft, a new type of shape memory alloy metal rubber (SMA-MR) damper which was made of Ni-Ti alloy wire processed by coil spring, cold stamping and post-treatment was designed. Through theoretical and experimental research on SMA-MR dampers, the equivalent rigidity and energy dissipation coefficient of the damping system in the temperatures range of 20~90℃ were analyzed. The law of mechanical properties of SMA-MR material with temperature was studied. The relationship between equivalent rigidity, energy dissipation coefficient and temperature were analyzed using the experimental results. The results show that the equivalent rigidity of SMA-MR dampers increases with the increase of temperature while the energy dissipation coefficient of SMA-MR dampers decreases. The analysis results provide theoretical basis and data reference for the design of SMA-MR dampers and their application under extreme environment. Copyright © 2020, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.