Study of Self-Locking Structure Based on Surface Microstructure of Dung Beetle Leg Joint

Area of Science:

• Biomimetics
• Mechanical Engineering
• Insect Morphology

Background:

• Dung beetle leg joints possess high load-bearing capacity attributed to their surface microstructure.
• Existing research lacks focus on the specific microstructures of dung beetle leg joints.
• Biomimetic designs inspired by natural structures can lead to efficient self-locking mechanisms.

Purpose of the Study:

• To investigate the surface microstructural characteristics of dung beetle leg joints.
• To design and test a self-locking structure inspired by these microstructures.
• To explore potential applications of the bionic joint in engineering.

Main Methods:

• Microscopic examination of dung beetle leg joints (tibia and femur) to identify surface microstructures.
• Design and fabrication of a self-locking structure based on observed fish-scale-like, brush-like, and spike-like features.
• Functional testing of the biomimetic structure for rotational and self-locking capabilities.

Main Results:

• Identified distinct fish-scale-like, brush-like, and spike-like microstructures on dung beetle leg joints.
• Developed a functional self-locking biomimetic structure that locks in reverse direction.
• The biomimetic closure achieved a self-locking force of 18 N at 20 °C.

Conclusions:

• Dung beetle leg joint microstructures provide a viable blueprint for novel self-locking mechanisms.
• The developed bionic intelligent joint demonstrates significant potential for folding applications.
• This research offers innovative design concepts for aerospace and engineering, including satellite and probe solar panels.