Journal
ACTA MECHANICA SOLIDA SINICA
Volume 35, Issue 2, Pages 239-247Publisher
SPRINGER
DOI: 10.1007/s10338-021-00268-2
Keywords
Nematic shell; Snap-through; Ultra-fast actuation
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Funding
- National Natural Science Foundation of China [11572308]
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The study suggests that for glassy nematic shallow spherical shells with hemeotropic director alignment, snap-through can be induced by incident light with moderate irradiation intensity, potentially inspiring new designs for contactless and ultra-fast actuation devices with high-rate output of mechanical work.
Photo-responsive nematic polymers can transduce light into mechanical work, but the rate is limited by the quasi-static deformation. To enhance the work output, a strategy of exploiting photo-triggered snap-through of glassy nematic shallow spherical shells with hemeotropic director alignment is examined here. The criterion for the nonlinear instability is derived analytically by using the modified iteration method. It is shown that, for thin shells of small height and large basal radius, snap-through can be caused by an incident light with moderate irradiation intensity. The phenomenon may inspire some new designs of contactless and ultra-fast actuation devices with high-rate output of mechanical work.
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