SANDWICH TYPE SHAPE MEMORY POLYMER COMPOSITE ACTUATORS TO INCREASE THE RECOVERY MOMENT AND DEFORMABILITY

Abstract

As the space technologies continue to accelerate, large space structures such as satellite panels and reflectors are needed. Therefore, to enable the efficient storage of such large space structures into limited spacecraft space, deployable structures have become key technologies. Shape memory polymer composites (SMPCs) are promising next-generation materials that have the ability to return from a deformed shape to their original shape when induced by an appropriate stimulus with several advantages like lightweight and high mechanical properties. However, the trade-off relationship between deformability and recovery moment should be resolved to fulfill the requirements of simultaneous improvement on deformability and recovery moment. In this study, novel structural design is proposed to solve this problem. New concept of a sandwich type SMPC bending actuator is suggested with two features: multiple neutral axes skins and a deployable core.