MIT and Northeastern engineers design stronger, more resilient metamaterials inspired by nature

According to MIT Advanced Manufacturing:

Background

For decades, synthetic metamaterials have been designed using a single building block, or unit cell, copied and pasted to form a precise, periodic microstructure. While this ordered approach improves overall performance, it has a major flaw: if one region cracks, the surrounding identical cells quickly buckle, leading to catastrophic failure.

Details

To overcome this limitation, a team from MIT and Northeastern University turned to network science, a field traditionally used to study complex systems like the internet or neural connections. Using a specialized algorithm, the researchers generated a physical network of intersecting beams with varying sizes and thicknesses, mimicking the web-like structures found in nature. By 3D-printing these patterns into polymer samples, they created scale-rich metamaterials that avoid the localization effect seen in ordered structures.

Impact

Physical tests showed that these network-inspired materials offer a widely controllable range of stiffness, resist sudden impacts more effectively, and can successfully cushion fragile objects. This design framework opens the door to next-generation protective gear, impact-absorbing structures, and specialized materials that control vibrations.