首页|Programming time-dependent behavior in 4D printing by geometric and printing parameters
Programming time-dependent behavior in 4D printing by geometric and printing parameters
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NETL
NSTL
万方数据
Smart structures realize sequential motion and self-assembly through external stimuli.With the advance-ment of four-dimensional(4D)printing,the programming of sequential motions of smart structures is endowed with more design and manufacturing possibilities.In this research,we present a method for physically programming the timescale of shape change in 4D-printed bilayer actuators to enable the sequential motion and self-assembly of smart structures.The effects of the geometric and printing parameters on the time-dependent behavior of 4D-printed bilayer actuators are investigated.The results show that the thickness of the active layer directly affects the timescale of motion,and increas-ing the thickness leads to faster motion until the thickness ratio is close to 4∶6.Similarly,a higher printing speed results in faster motion.Conversely,a higher printing temperature and a greater layer height result in a slower shape change.The effects of the length-width ratio,line width,and fill-ing ratio on the timescale of motion are not as straightfor-ward.Finally,we demonstrate several smart structures that exhibit sequential motion,including a labyrinth-like self-folding structure that is choreographed to achieve multi-step self-shaping and a flower-shaped structure where each part completes its movement sequentially to avoid collisions.The presented method extends the programmability and func-tional capabilities of 4D printing.
NETL
NSTL
万方数据
