CALIBRATION OF THE HYSTERESIS LOOP OF SMA WIRES HEATED BY ELECTRIC CURRENT | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 28, Volume 15, 15th International Conference on Applied Mechanics and Mechanical Engineering., May 2012, Page 1-13 PDF (1.03 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.2012.36929 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. Fouda1; M. Tawfik2; G. Elbayoumi3 | ||||
| 1Graduate student, Dept. of Aerospace Eng., Cairo University. | ||||
| 2Associate professor of aircraft structures, Dept. of Aerospace Eng., Cairo University. | ||||
| 3Professor of aircraft control and guidance, Dept. of Aerospace Eng., Cairo University. | ||||
| Abstract | ||||
| ABSTRACT The undesirable vibrations in all structures types (buildings, vehicles, machines and electronics) affect the durability, performance and the control of these structures. Damping of these vibrations is the concern of many researches using smart materials. The super-elastic behavior of shape memory alloys (SMA) may be utilized in the active damping of structures vibrations. SMA wire was obtained for this research but we had to calibrate it to get loadelongation- heat relations. In the process of SMA calibrating, an experimental device was designed to measure different loadings and the corresponding elongations at different heating conditions. To control the temperature an electric direct current was used. The obtained experimental results were similar to the results in several published researches. The relation between the electric current and the crystal transformation of SMA under different loadings is well defined. Clear stress-strain curves showing the hysteresis loop at different current values were obtained. | ||||
| Keywords | ||||
| shape memory alloy; Pseudo-elasticity; Vibration; Active control; and Smart Materials | ||||
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