Mechanistic Analysis and Bio-inspired Applications for a Bidirectional Stiffness of a Water Snail Operculum

IF 4.9 3区计算机科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Journal of Bionic Engineering Pub Date : 2023-05-31 DOI:10.1007/s42235-023-00384-4

Ke Xu, Xiaoming Xu, Qi Yang, Jianing Wu, Zhigang Wu, Jinzhao Yang

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引用次数: 0

Abstract

The water snail Pomacea canaliculata retracts the discoidal and multi-layered operculum to protect the soft body from being attacked by predators, and releases it when threats lifted. However, the duration of the operculum retraction is usually less than that of the operculum protraction. In this paper, we elucidate the biological compliant mechanism of the operculum. By using confocal laser scanning microscopy, we find that the operculum has compliant sandwiched layers between hard layers. The layered structure results in a compliant mechanism with a bidirectional stiffness for the locking and unlocking processes of the operculum. A mathematical model is derived to rationalize the bidirectional stiffness mechanism of the operculum. In addition, we carry out the experiments on the locking and unlocking processes. The experimental results show that the locking tension is about two-fifths of the unlocking tension of the operculum. Moreover, based on the mechanical properties of the operculum with the layered structure, we designed an operculum-inspired structure, which may have a variety of potential applications in combined driving patterns.

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水螺壳双向刚度的力学分析及仿生应用

水螺的盘状和多层的包盖收缩，以保护柔软的身体免受捕食者的攻击，当威胁解除时释放它。然而，包盖收缩的持续时间通常小于包盖拉伸的持续时间。在本文中，我们阐明了盖的生物学顺应机制。通过激光共聚焦扫描显微镜观察，我们发现包盖层在硬层之间具有柔性夹层。所述分层结构形成具有双向刚度的柔性机构，用于所述盖的锁定和解锁过程。推导了一种数学模型，合理地解释了气盖的双向刚度机理。此外，我们还对锁和解锁过程进行了实验。实验结果表明，锁紧张力约为闭锁张力的五分之二。此外，基于被盖层结构的力学特性，我们设计了一种受盖层启发的结构，这种结构可能在组合驱动模式中有多种潜在的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Bionic Engineering 工程技术-材料科学：生物材料

CiteScore

7.10

自引率

10.00%

发文量

162

审稿时长

10.0 months

期刊介绍： The Journal of Bionic Engineering (JBE) is a peer-reviewed journal that publishes original research papers and reviews that apply the knowledge learned from nature and biological systems to solve concrete engineering problems. The topics that JBE covers include but are not limited to: Mechanisms, kinematical mechanics and control of animal locomotion, development of mobile robots with walking (running and crawling), swimming or flying abilities inspired by animal locomotion. Structures, morphologies, composition and physical properties of natural and biomaterials; fabrication of new materials mimicking the properties and functions of natural and biomaterials. Biomedical materials, artificial organs and tissue engineering for medical applications; rehabilitation equipment and devices. Development of bioinspired computation methods and artificial intelligence for engineering applications.