Modeling Rate-Dependent Dissipation in Granular Solids via Continuum Thermodynamics
Abstract
This project will investigate the processes that control the dissipation of energy during high-pressure impact and penetration in granular media by formulating and validating new hypotheses about the interplay between energy loss through surface area creation and the consumption of energy in systems undergoing simultaneous comminution, frictional shear and volume change. Energy scaling hypotheses at particle and assembly scales will be used to define the role of the strain rate on the dissipative capacity of a granular material. Such hypotheses will be tested through experiments conducted at both length scales and will be used to formulate a rate-dependent continuum thermodynamic model for crushable materials. The outcome of this project will be a multi-scale methodology able to characterize the dissipative properties of granular barriers on the basis of particle-scale characteristics such as grain size, shape, mineralogy and degree of polydispersity.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 22, 2017
- Source ID
- W911NF1610439
Entities
People
- Giuseppe Buscarnera
Organizations
- Army Contracting Command
- Northwestern University
- United States Army