Scaling of relaxation and excess entropy in plastically deformed amorphous solids
Abstract
When stressed sufficiently, many solids plastically deform and flow. This plastic deformation induces irreversible structural changes, which are sometimes used in practice to manipulate microstructure of materials to achieve desired mechanical properties. Unfortunately, our limited fundamental understanding of the interdependence of plastic flow and microstructure represents a design barrier for improvement of strength, hardness, and ductility in amorphous solids, where constituent particles are haphazardly arranged. Here, we study plastic flow and its influence on the microstructure of disordered colloidal solids. Video images, with single-particle resolution, reveal connections between bulk mechanical response and microstructure during plastic deformation. Specifically, structural relaxation induced by plastic flow depends on strain rate at earlier times and predicts microscopic structural features at later times.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 19, 2020
- Source ID
- 10.1073/pnas.2000698117
Entities
People
- Arjun Yodh
- Douglas J. Jerolmack
- K Lawrence Galloway
- Nathan C Keim
- Paulo E Arratia
- Xiaoguang Ma
Organizations
- Army Research Office
- National Aeronautics and Space Administration
- National Science Foundation
- Pennsylvania State University
- University of Pennsylvania