Rice Grains Reveal the Secret to a Self-Altering Material That Needs No Electronics

How Rice Reacts Under Pressure: A Breakthrough Discovery

According to НВ — Техно: June 11, 23:00

A team at the University of Birmingham has uncovered a surprising behavior in densely packed rice grains when subjected to pressure-their response depends entirely on how quickly the force is applied. When compressed slowly, the grains retain their shape and strength, but a sudden impact causes the material to weaken. This effect, known as "rate-dependent friction reduction," could pave the way for a new class of adaptive materials.

What This Means for Engineers

Under an instantaneous impact, the friction between individual rice grains drops dramatically, opening up fresh possibilities for engineering. By combining these rice-based granular particles with sand that hardens in response to speed, researchers created a novel composite metamaterial. This substance can bend, deform, or stiffen on its own depending on the mechanical stimulus-no microchips, sensors, or batteries required.

'Rather than programming the structure electronically, the scientists let the laws of physics make decisions for the device: fast loads trigger one type of material behavior, while slow ones trigger a completely different response.' Dr. Mingchao Liu, University of Birmingham

The findings were published in the scientific journal Matter, highlighting the significance and novelty of the results.

This development of a composite metamaterial based on rice grains opens up new possibilities for industries that require materials with adaptive properties. The research shows how natural substances can be harnessed for innovative technologies, making them more efficient and versatile. Continued exploration of such materials could lead to groundbreaking engineering solutions and technologies that reshape our understanding of mechanical behavior.