New textile adjusts its aerodynamic properties, can transform wearables

Researchers at Harvard’s John A. Paulson School of Engineering and Applied Sciences have developed an innovative textile capable of dynamically adjusting its aerodynamic properties through on-demand surface dimpling. Inspired by the dimples on a golf ball that reduce drag by inducing turbulence, this textile forms dimples when stretched, even when tightly fitted to the body. By varying the size and pattern of these dimples, the fabric can reduce aerodynamic drag by up to 20% at specific wind speeds, as demonstrated in wind tunnel experiments. This adaptability is enabled by a unique lattice pattern within the textile composite, which allows expansion rather than tightening when worn. The textile is created using a two-step manufacturing process that combines a stiffer woven material with a softer knit layer, resulting in a flexible yet structured composite. Extensive simulations and experiments with different lattice tessellations (such as squares and hexagons) helped optimize the dimpling patterns for targeted aerodynamic performance. Published in Advanced Materials, the study highlights the potential applications of this smart textile