Direct observation of impact propagation and absorption in dense colloidal monolayers
Abstract
Single-particle characterization of the impact response has unveiled design principles to focus and control stress propagation in macroscopic granular crystalline arrays. We demonstrate that similar principles apply to aqueous monolayers of microparticles excited by localized mechanical pulses. By inducing extreme local deformation rates and tracking the motion of each particle with velocities that reach up to few meters per second, we reveal that a regime of elastic collisions, typically forbidden due to overdamping, becomes accessible. This provides insights on the stress propagation and energy absorption of dense suspensions upon fast deformation rates.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 30, 2017
- Source ID
- 10.1073/pnas.1712266114
Entities
People
- Chiara Daraio
- Ivo Buttinoni
- Jinwoong Cha
- Lucio Isa
- Stéphane Job
- Wei-hsun Lin
Organizations
- Agence Nationale de la Recherche
- Air Force Office of Scientific Research
- California Institute of Technology
- ETH Zurich
- Swiss National Science Foundation