Studies on the High Rate Behavior of Damaged and Granular Brittle Materials
Abstract
During impact into brittle materials, fragments are formed and flow past each other, creating fine granular material through frictional sliding. These processes that manifest during impact that transform an intact brittle material to a damaged (fractured) material, and then to a granular form are not well understood, nor is the behavior of the damaged and granular materials. Towards this end, the primary objective of this research project is to understand the fundamental failure mechanisms that manifest under mechanical loading that transform intact brittle materials to fractured (damaged) forms, and then to fragments. The thrust of the program will be on studying the strength, failure, and fragmentation of damaged and granular materials in controlled laboratory experiments. We will study the material response using two experimental approaches: (1) compression experiments on pre-cracked materials, and (2) triaxial compression experiments on granular materials. Our goal is to provide well-characterized laboratory data that can be used to develop and validate physics-based models for damaged and granular brittle materials that are being developed by ARL [Tonge and Ramesh 2016] and Lawrence Livermore National Lab [Homel and Herbold 2016]. We will apply our insights to the design of lighter and more effective advanced ceramic materials used for protection by controlling and optimizing their chemical and physical structures. This will improve the tactical efficiency of soldiers and save lives.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 10, 2019
- Source ID
- W911NF1720213
Entities
People
- James D Hogan
Organizations
- Army Contracting Command
- United States Army
- University of Alberta