Abstract
In this paper, the surface instability of a constrained square liquid crystal elastomer (LCE) membrane under UV light is investigated. Firstly, the governing equations for the LCE membrane with an arbitrary pre-designed uniaxial director (common orientation vector) pattern are established. By adopting the finite difference method, for a fixed incident light intensity, the transformation of the surface buckling morphology with respect to length-thickness ratio and light decay distance of the LCE membrane is discussed in detail. The buckling condition is given and instability patterns are clarified. This work enhances the understanding and provides the guidance in design of the LCE based light driven membrane elements.
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