Title :
An experimental study on shift in natural frequency of sandwich beam with elastomeric core embedded with SMA wires
Author :
More, D.J. ; Kumbhar, S.B.
Author_Institution :
Dept. of Mech. Eng., R.I.T. Rajaramnagar, Sangli, India
Abstract :
In this paper an experimental study of dynamic behavior of sandwich beam with elastomeric core embedded with shape memory alloy (SMA) wires is done. The three pre-strained Ni 50%, Ti 50% wires with 10 mm offset from neutral axis are used. The wires are embedded along the length of rectangular beam and elastomeric core is sandwiched between two copper plates. The beam is tested for free-free boundary condition and average 48% shift in natural frequency is observed when the stiffness of beam is changed by heating the wire by 4.5 amp electric current. The effect of actuation current on damping factor and time required to regain its original frequency, after making current zero, is estimated and presented.
Keywords :
beams (structures); cores; damping; elastomers; electric actuators; mechanical testing; sandwich structures; shape memory effects; structural engineering; wires; SMA wire; actuation current effect; copper plate; damping factor; elastomeric core; free-free boundary condition; natural frequency; neutral axis; rectangular beam; sandwich beam; shape memory alloy wire; size 10 mm; wire heating; Copper; Damping; Wires; Shape memory alloy; actuation; sandwich beam; silicon rubber;
Conference_Titel :
Advanced Nanomaterials and Emerging Engineering Technologies (ICANMEET), 2013 International Conference on
Conference_Location :
Chennai
Print_ISBN :
978-1-4799-1377-0
DOI :
10.1109/ICANMEET.2013.6609383
