F Melekpour - B.Sc. Student, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, ۱۶۸۴۶-۱۳۱۱۴, Iran
M.M Shokrieh - Professor, Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School ofMechanical Engineering, Iran University of Science and Technology, Tehran, ۱۶۸۴۶-۱۳۱۱۴, Iran
S Farahifar - Ph.D. Candidate, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, ۱۶۸۴۶-۱۳۱۱۴, Iran

Nowadays, smart behaviors of materials are noticed more than at any time in the history of material science.A material is considered to be smart if at least it shows a reaction in form of a change in color, shape, size, sound, electricpulse, and other forms of diagnosable changes. These changes are since something has been changed in its circumstance;therefore, it will comprehend its surroundings. Shape memory alloy (SMA) is a type of smart material that in the properconditions shows a contracting reaction as a response to temperature rise. If this reaction is managed properly, it couldbe a beneficial capability to use for many tasks. The present paper is an introduction to the history of SMA that in mostcases considered as Nitinol and a review of its vast applications. The present research discusses the capabilities of thismaterial, especially in comparison to traditional materials.

Smart materials; Mechanical characteristics; SMA; Actuator; Biomedics