关键词: 变形分析, 驱动器, 形状记忆合金, 智能结构, 改进的恢复力-位移曲线法, 间隙识别, 正交投影技术

Abstract: The restrained shape memory alloy (SMA) layers, as actuators, are pasted on the surfaces of the structure. Upon heating the layers, the martensitic residual strain will be restored, the large recovery forces are induced so that the structure will deform. A mechanic model of a beam, the simplified wing or blade, covered with an induced strain actuator (a SMA layer), is presented. The mixed deformations of compression and bending of the beam with SMA layer bonded to one surface aligned with the beam axis are analyzed, and the analytical expressions of strains, bending slope and defection of the beam are given. The theoretical predictions are validated with static experiments.

Key words: Actuator, Deformation analysis, Shape memory alloy, Smart structure, Modified RFS, Orthogonal projection , Clearance identification