David T. Farrell

PhD Candidate @ Harvard University
Mechanical Engineering


Bridging research and textiles — advancing mechanical metamaterials for wearable applications.

I’m a PhD Candidate in Mechanical Engineering @ Harvard University, working at the intersection of mechanical metamaterials, wearable technology, and fluid–metamaterial interactions. 

My research explores how architected materials can dynamically modulate textile properties—such as texture, stiffness, and aerodynamics—to enhance performance in applications ranging from sportswear to aerospace systems.

Beyond research, I’m passionate about mentoring early-career engineers and fostering interdisciplinary collaboration between mechanics, thermofluids, and design.

Research Spotlight.

Our latest study, published in Advanced Materials, introduces a stretchable textile metamaterial capable of dynamically altering its aerodynamic drag by modulating surface texture in response to a uniaxial stretch. The auxetic textile can generate dimples even when tightly fitted around a body or object. The system demonstrates a new regime in fluid-metamaterial coupling, where mesoscopic unit-cell deformation is used to control aerodynamic properties.

“… textile dimpling opens promising avenues for surface roughness control of bodies or objects, offering exciting opportunities in fluid-dynamic optimization for aerospace, maritime and civil engineering systems.”

Cover image for the paper: Programmable Surface Dimpling of Textile Metamaterials for Aerodynamic Control

Programmable Surface Dimpling of Textile Metamaterials for Aerodynamic Control

David T. Farrell, Connor M. McCann, Antonio Elia Forte, Conor J. Walsh, Katia Bertoldi Advanced Materials · Wiley 2025