Validation and Optimization of a Compact Push-Pull Rubber Actuator Energized by an Outer Coil of Shape Memory Wire
Mechanics based design of structures and machines(2018)
摘要
The authors have formerly published the analytical model and finite element validation of a push-pull actuator made by winding a thin shape memory wire on a solid rubber cylinder. The cylinder provides elastic backup for the wire upon cooling down and transforms its circumferential contraction into a magnified axial elongation upon heating up. Building on that study, this paper accomplishes three tasks: (1) build prototype actuators and perform simple tests to validate the theory; (2) develop simple procedures for the optimal design of the actuator starting from high-level engineering specifications; (3) envision how the present concept could be improved by replacing the rubber block with a compliant lattice-like or shell-like scaffold with designed properties to further enhance the axial stroke.
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关键词
Shape memory alloys,wires,rubber cylinder,push-pull actuator,optimization
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