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Researchers have developed a structure inspired by armadillos that automatically reacts to external threats and enhances the protection of fragile devices.
A technology inspired by armadillos could change the way flexible robots, soft machines, and delicate electronics are protected against impacts.
Researchers from North Carolina State University, in the United States, have developed a structure capable of automatically reacting when it detects mechanical stress.
The system uses biomimicry, a strategy that reproduces mechanisms found in nature to solve challenges of modern engineering.
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The structure remains flexible during normal operation. A touch or impact, however, activates a mechanism that causes the module to curl up and form a rigid protection.
The result is a kind of artificial shell, created to protect sensitive components without compromising the equipment’s mobility and flexibility.
How inspiration from armadillos led to the new technology
Armadillos have a natural defense system based on closing their bodies to protect vulnerable areas.
Researchers used this biological principle as a reference to develop a solution aimed at flexible robotics and advanced electronics.
The created structure reproduces this behavior in an automated way.
A mechanical stimulus is enough to initiate the transformation of the module, which quickly shifts from a soft configuration to a rigid configuration.
Structure combines exoskeleton, sensors, and heating mechanism
The protective module is composed of three main layers.
The outer layer functions as an exoskeleton, formed by curved and segmented scales produced in 3D printed resin.
An intermediate layer gathers the systems responsible for sensing and mechanical actuation.
Liquid crystal elastomer, strain sensor with silver nanowires, Kapton tape, and conductive fabric integrate this part of the structure.
The inner layer acts as an endoskeleton, using folded resistant paper to maintain the correct positioning of the rigid scales.
System reacts automatically when touch or impact is detected
The tension sensor continuously monitors the deformations experienced by the structure.
A signal is sent to the control unit as soon as a touch or impact is identified.
The heating layer is activated immediately.
The increase in temperature causes the elastomer to contract and the Kapton tape to expand.
The entire structure begins to curve until it assumes a circular protective shape.
Scales present in the endoskeleton fit together during this movement.
The fitting creates a robust internal structure and significantly increases the module’s resistance.
Tests indicate increased resistance without excessive weight gain
Results obtained by the team showed that the number of scales directly influences the structure’s rigidity.
Models with more scales showed better mechanical performance during the tests.
Yong Zhu explained that the project was developed to balance structural strength and weight reduction.
One of the experiments demonstrated that a set with ten segmented scales withstood approximately 10 newtons of force.
Flexible robotics could be one of the main beneficiaries
Applications in flexible robotics, flexible electronics, and delicate equipment are among the main focuses of the research.
Devices of this type usually exhibit high sensitivity to impacts and deformations.
The new structure was designed precisely to offer protection only when necessary.
Researchers believe that the combination of flexibility and mechanical protection opens up space for new technological applications.
After all, how many other innovative solutions might still emerge when engineering decides to take a closer look at the mechanisms created by nature itself?
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