Guiding of High Amplitude Stress Waves Through Stress-Induced Domain Switching in Multiphase Materials
Abstract
Periodic and graded Multiphase Materials (MMs) can be assembled for desired/extreme anisotropy. This can be exploited to alter the path of propagation of high amplitude stress waves. Steering of stress waves in preferential directions can be achieved through the proper arrangement of soft and hard inclusions within a matrix, or the selection of the configuration of periodic and graded lattices. In the linear range of operation, fixed MM topologies pro- vide only one way of handling stress waves, i.e., stress waves are steered towards well-defined preferential directions. Topological changes associated with large deformations of MMs, for example resulting from the propagation of the stress wave itself, can be intentionally pur- sued as an effective approach for adaptive wave steering and for the enhancement of the dissipation of the impact energy. Global and local instabilities in MMs are here investigated as the mechanisms for topological adaptation. The concept of domain switching is specifi- cally investigated through a combined theoretical, computational and experimental research program. Applications that will be specifically studied include the case of an incident com- pressive stress wave inducing topological changes in a given protective structure where the reflected wave encounters a material with different mechanical impedance.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 25, 2021
- Source ID
- W911NF1210460
Entities
People
- Julian J Rimoli
Organizations
- Army Contracting Command
- Georgia Tech Research Corporation
- United States Army