LCE球囊的巨大变形和软充盈
Giant deformations and soft-inflation in LCE balloons
摘要:
我们提出,气球可以控制,丰富和放大,通过使用橡胶网络的排列分子棒被称为液晶弹性体(LCEs)。首先,LCE是有前途的人造肌肉,显示出响应于热和光的大的自发变形。在LCE球囊中,自发变形可以触发经典的气球膨胀,作为相分离(在恒定体积下)或体积跳跃(在恒定压力下),导致大大放大的致动应变。其次,即使在恒定的温度下,LCE也具有通过软变形模式增强的不寻常的力学性能,在软变形模式中,LCE导向器在弹性体内旋转。这些软模式丰富了LCE气球的力学,它也可以在旋转和未旋转状态之间“气球”,无论是在经典的不稳定性期间,还是作为一个单独的前体,导致膨胀期间的连续不稳定性。
英文摘要:
We propose that ballooning can be controlled, enriched and amplified by using rubbery networks of aligned molecular rods known as liquid crystal elastomers (LCEs). Firstly, LCEs are promising artificial muscles, showing large spontaneous deformations in response to heat and light. In LCE balloons, spontaneous deformations can trigger classic ballooning, either as phase-separation (at constant volume) or a volume jump (at constant pressure), resulting in greatly magnified actuation strains. Secondly, even at constant temperature, LCEs have unusual mechanics augmented by soft-modes of deformation in which the nematic director rotates within the elastomer. These soft modes enrich the mechanics of LCE balloons, which can also "balloon" between rotated and unrotated states, either during the classic instability, or as a separate pre-cursor, leading to successive instabilities during inflation.
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