期刊
COMPOSITES PART B-ENGINEERING
卷 173, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2019.106905
关键词
Shape memory polymer; Triple-shape memory effect; FEM simulation; Polymer application
资金
- National Natural Science Foundation of China [11632005, 11672086]
A segmented styrene-based shape memory polymer (SMP) comprising two types of SMP materials (S1-SMP and S2-SMP) was fabricated by using a two-step curing method to exhibit the triple shape memory effect (tripleSME). The material properties of S1-SMP and S2-SMP parts were explored using dynamic mechanical analysis, multi-frequency scan testing, thermal expansion measurements, static tensile testing and shape memory testing, respectively. Meanwhile, the triple-SME of segmented SMP was also characterized by shape memory testing with continue heating step. These experimentally determined material properties were incorporated into the theoretical model for the triple-SME based on a phase transition model and Generalized Maxwell model. Experimental verification was obtained by observing the triple-SME behavior under uniaxial tensile strain of 20%. Finally, the triple-SME behavior of SMP was assessed in two engineered implementations; a programmable self-deployed structure model and double bottle-shaped smart mandrel. Good agreement was demonstrated between experimental result and a finite-element model (FEM) simulation during the continue heating recovery step.
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