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Magnetic Damping

Magnetic Damping

Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...

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Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

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Reprogramming multi-stable snapping and energy dissipation in origami metamaterials through panel confinement.

Abdulrahman Almessabi¹, Xuwen Li¹, Amin Jamalimehr¹

¹Department of Mechanical Engineering, MGill University, Montreal, Quebec H3A 0G4, Canada.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences

|October 7, 2024

Summary

Panel confinement in origami metamaterials controls snapping force and energy dissipation. Modulating this confinement allows for in situ reprogramming of mechanical responses for diverse applications.

Keywords:

energy dissipation multi-stability origami metamaterials reprogrammability

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Area of Science:

Mechanics of Materials
Metamaterials Science
Origami Engineering

Background:

Origami-inspired metamaterials offer tunable mechanical properties.
Understanding panel confinement effects is crucial for controlling their behavior under cyclic loading.

Purpose of the Study:

To quantify how panel confinement affects snapping force and energy dissipation in origami metamaterials.
To demonstrate in situ reprogramming of mechanical responses through panel confinement modulation.

Main Methods:

Computational modeling
Proof-of-concept fabrication
Cyclic mechanical testing

Main Results:

Governing factors for altering or preserving snapping force magnitude during cyclic loading were identified.
In situ modulation of panel confinement successfully reprogrammed snapping sequence and energy dissipation.

Conclusions:

Panel confinement modulation is a practical design strategy for reprogrammable mechanical responses in origami metamaterials.
Findings enhance the versatility of these metamaterials for applications requiring controlled damping and energy dissipation.