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Two-way shape memory behavior of styrene-based bilayer shape memory polymer plate |
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| Authors: | Haiyang Du Yongtao Yao Xiaoli Zhou Yajun Zhao |
| Institution: | 1. The Center for Computational Mechanics and Engineering Applications, Hebei University of Engineering, Handan, China;2. National Key Laboratory of Science and Technology on Advanced Composite in Special Environments, Harbin Institute of Technology, Harbin, China;3. The Center for Computational Mechanics and Engineering Applications, Hebei University of Engineering, Handan, China
Provincial Mechanics Experimental Teaching Demonstration Center, Hebei University of Engineering, Handan, China |
| Abstract: | In this work, a bilayer shape memory polymer (SMP) composite plate with two-way shape memory behavior is simulated, in which two types of styrene-based SMPs with well-separated glass transition temperatures are assembled in parallel. The finite element (FE) software ABAQUS is selected to exhibit the two-way shape memory effect during the shape recovery step and the Generalized Maxwell Model with the WLF equation is applied to characterize the temperature-dependent properties of the SMP bilayer plates. The effect factors of axial predeformation, thermal expansion coefficient and plate thickness are all considered for the two-way shape memory behavior of the styrene-based bilayer SMP plate. After that, a smart gripper composed of four SMP composite plates is proposed to realize grabbing and releasing functions for one-step and staged heating recovery. The FE results provide some necessary theoretical guidelines for future soft smart structural designs and optimization. |
| Keywords: | bilayer composite plate shape memory polymer smart gripper two-way shape memory behavior |