DURIP Ultra-high-speed diagnostics for hypervelocity impact experiments on elastomers
Abstract
Project Summary Publicly ReleasableThe performance of materials under impact or high strain rate loading is critical in a variety of defense applications. Our interest in the impact and high-strain-rate performance of elastomers is driven by an increase in the use of these materials in recent defense applications, including missile defense, protective structures and materials systems, ballistics, fragmentation, and explosives. As the applications of these materials proliferate, the need for data on their response to shocks and high-strain-rate deformations (and their dynamic failure modes) has increased rapidly. Further, many of their applications involve very high velocities of impact, and these are uniquely challenging conditions for these material systems.Such materials are notwell-studied in the literature in comparison to metals and ceramics, and constitutive equations for these materials have generally not been focused on dynamic or high-strain-rate applications. High velocity impact experiments, such as the plate impact experiment,can reveal critical aspects of material performance in key application areas relevant to the naval mission. Such experiments generate a uniaxial strain rate, making them very amenable for analysis, and allowing the determination of the material#s Hugoniot, the equation of state, spall strength, and potential phase transformations.Here, we propose upgrades to the Johns Hopkins Hypervelocity Facility for Impact Research Experiments (HyFIRE) to enable us to perform state of the art plate impact experiments on elastomers at very high impact velocities (1-3 km/s) relevant to critical defense applications. The required equipment includes in situ experimental diagnostics through multi-point photon doppler velocimetry, and a high-resolution digital microscope for setting up and characterizing the target material surfaces for the plate impact experiment.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 13, 2025
- Source ID
- N000142512115
Entities
People
- Kaliat Ramesh
Organizations
- Johns Hopkins University
- Office of Naval Research
- United States Navy