Armored demon beetle, Capelin Demonic, It can withstand more blows, squeezes and punctures than the exoskeleton of any other beetle. A group of scientists studied its armor with the aim of improving the design of engineering structures.
many types beetle They resort to the ability to evade predators, but others are forced to develop protective mechanisms to protect themselves.
This is a special situation of the family Muscidae, Known as “armor”, its main strength lies in the hardness of its exoskeleton. In this most powerful family of terrestrial insects, Armored demon beetle (Capelin Demonic), Analysis and research have been conducted to improve the knowledge applied to architecture and engineering, especially in the field of architecture and engineering. Aeronautics.
Scientists said: “The combination of different materials in engineering structures, such as plastics and metals, remains a challenge.” David Kisailus, Is a researcher at the University of Irvine (USA), the main author of the study was published in natural.
“Mechanical fastening, conventional welding and adhesive bonding are some examples of the technologies used today, but each of these methods has its own set of problems, such as the formation of stress concentrators or under exposure conditions. The degradation of the environment, reducing the force and leading the author to point out: “premature failure.”
Impossible to squash insects
This kind of beetle, It lives on North AmericaBecause of its high resistance, it attracted the attention of this group of scientists. Exoskeleton. As they describe, “This beetle has excellent abilities. It can resist crushing and perforation caused by the attack of natural enemies, and it can even withstand the impact of cars.”
Researchers pointed out that the reason why certain species developed such a hard body was discovered in their evolution. Flying ancestors, They lost their agility, but in exchange for a stronger, multi-functional exoskeleton, which will enable them not only to better store water, but also to protect themselves from carnivores.
This modification is produced by merging and compressing it ElitrosEach rigid wing covers the lighter wings of this insect, just like the red “shell” of a ladybug, like a box.
For survival, Stick insects Demonic First, it will use camouflage to make the camouflage appear rough relative to the natural environment (such as hardwood and conifer bark), and will pretend to be death when it detects a threat.
When plan A fails, Exoskeleton toughness It stands between insects and prey.Since scientists can verify the time to compress insects, the insect’s body can withstand a maximum pressure of 169 n without breakingewtons, “Its weight is 39,000 times, which greatly exceeds the strength that an adult can generate by pressing the thumb and index finger together.”
The research team compared this resistance with the resistance of other beetle species with similar predation capabilities, such as the desert beetle (Asbrus wart), its “initial stiffness is similar to Capelin Demonic, But at about 50% of voltageThey explained in the study, “This shows that the composition or design features within the exoskeleton are different.”
Cross-sectional view of the beetle’s chest. /David Kisailus
What is your exoskeleton made of?
Later, scientists resorted to Advanced microscope, Spectroscopy Perform mechanical tests to study the composition and design of the exoskeleton.While cutting the insects, the author observed a series of Chain puzzle joint In the middle of the elytra.
They also found that the geometry of these leaves and their stacked microstructures harden the beetle’s exoskeleton.
“To test the potential benefits of applying this design to mechanical hooks, we established a series of Biomimetic compound “Based on the solution that nature has already solved-with similar geometry and microstructure,” the researchers pointed out.
These ones hook According to the examples provided in the work, the “connector” or “connector” will be similar to the connector in certain accessories of a turbine engine or landing gear.
“Their follow-up evaluations-they continue-show that the composite blades that mimic the vicious armor beetle are slightly stronger than the hooks currently used in engineering, and show an increased effect.” The dissipation rate exceeds 100% They emphasized.
The expert concluded, ” Biomimetic compound Products that imitate the geometry and microstructure of the vicious armor beetle have a direct advantage over aviation hooks, which can provide them with greater strength and significantly increase resistance. “
David Kissillos Wait. (2020) “The toughening mechanism of the elytra of the demonic iron beetle”. natural October 21, 2020