Active Control of Nitinol-Reinforced Composite Beam

摘要: Considerable attention has been devoted recently to the utilization of Shape Memory NIckel-TItanium alloy (NITINOL) in developing SMART composites that are capable adapting intelligently external disturbances (Ikegami et al. 1990, Rogers al.1991, and Baz 1990 1991). Such wide acceptance NITINOL stems from its unique behavior when it is subjected particular heating cooling strategies. For example, becomes soft cooled below martensite transformation temperature about four times stiffer heated above austenite (Funakubo 1987). Furthermore, if trained have a shape while phase, will memorize this shape. If then phase subject plastic deformation, return memorized temperature. The produces significant forces as recovers original acts an actuator transforming thermal energy into mechanical (Perkins 1975 Duerig 1990). Accordingly, fibers embedded inside composite matrix at optimal locations, they can be used control static dynamic characteristics resulting composite. action generated by described stiffening and/or memory effect. With such built-in capabilities, performance optimized tailored match changes operating conditions.