Active composites by multi-material 3d printing

Abstract eng:
In this paper, we design and 3D print active shape memory polymer (SMP) composites which can show multi-shape memory effect when stimulated by heat. This is achieved by carefully allocating two groups of fibers made of different digital shape memory polymers that have different thermomechanical properties into different locations within the composite. After programming, these fibers recover their shapes at different temperature, leading multiple shape change. By tuning the prescribed strain, programming temperatures, and spatial distributions of these fibers, we can control the shape changing behavior of the printed structure. A theoretical model is also applied to predict the deformation behavior of the sample during recovery procedure. The printed active composites (PAC) are then used to create self-folding and self-opening structures.

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