A soft bioinspired suction cup with tunable adhesion force using shape memory alloy

IF 3.7 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION Smart Materials and Structures Pub Date : 2024-08-14 DOI:10.1088/1361-665x/ad6cbb

Weimian Zhou, Chanchan Xu, Guisong Chen, Xiaojie Wang

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Abstract

Suction cups has been widely utilized to grasp objects, but they typically encounter challenges with sealing failure and non-adjustable adhesion force. In this study, a bioinspired suction cup integrated with an shape memory alloy actuated module was proposed to solve these problems. The actuating performance under different input current was firstly investigated to ensure the effectiveness of the module. Then, inspired by the surface structures of the tree frog’s toe pad, the synthetic bioinspired suction cups with hexagonal microstructures at the rims were designed. The regular cup with soft and smooth rim was also fabricated for comparison study. Furthermore, the adhesion performance and surface adaptability of different two cups were studied in both dry and water conditions on substrates with various roughness levels. The results indicated that the proposed active bioinspired suction cup exhibited higher pull-off strength and better sealing on less rough substrates. The proposed bioinspired suction cup possessed the advantages of compactness and lightweight, thus demonstrating potential for integration into arrayed suction grippers.

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利用形状记忆合金制造具有可调附着力的软生物吸盘

吸盘已被广泛用于抓取物体，但它们通常会遇到密封失效和粘附力不可调等难题。本研究提出了一种集成了形状记忆合金驱动模块的生物启发吸盘来解决这些问题。首先研究了不同输入电流下的驱动性能，以确保模块的有效性。然后，受树蛙趾垫表面结构的启发，设计了边缘具有六边形微结构的合成生物启发吸盘。为了进行对比研究，还制作了边缘柔软光滑的普通吸盘。此外，还研究了这两种吸盘在不同粗糙度的基底上，在干燥和水中的粘附性能和表面适应性。结果表明，所提出的主动生物启发吸盘在粗糙度较低的基底上具有更高的拉拔强度和更好的密封性。所提出的生物启发吸盘具有结构紧凑、重量轻的优点，因此具有集成到阵列式吸力夹具中的潜力。

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来源期刊

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

期刊介绍： Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.