FUNDAMENTAL FREQUENCY OF HYBRID COMPOSITE PLATE EMBEDDED WITH SHAPE MEMORY ALLOY WIRE

Fundamental frequency had been identified as one of the most critical parameter in vibration study which may lead to structure failure during resonance. One of the most interesting behaviors of Shape Memory Alloy (SMA) is that the fundamental frequency of the structure shifted when different temperature levels applied onto it. The fundamental frequency of hybrid composite plate embedded with the SMA wire was studied using impact hammer testing on different boundary conditions. The structure was applied with DC to the SMA wire. The results showed that the fundamental frequency and damping ratio for the hybrid composite plate were shifted and it depend on the heat level applied to the Flexinol wire and the boundary conditions of the plate. The highest value of the fundamental frequency that shifted was about 44.4% with boundary condition CF-C-F with 0.5 A DC applied and the damping at fundamental frequency, 6.23 unit changes detected for the C-F-F-F boundary condition but with 1.25 A DC applied.