Hugoniot and dynamic strength in polyurea
Abstract
Polyurea is of interest for blast mitigation of structures, which requires a good understanding of the dynamic properties including the shock Hugoniot and dynamic spall and shear strength. In this study, reverse impact experiments were used to determine the shock Hugoniot, direct impact experiments were used to determine the spall strength, and lateral manganin gauge experiments were used to determine the dynamic shear strength. Reverse impact experiments revealed that the Hugoniot has a linear fit at low pressures and appears to be undergoing a reaction at higher pressures. The spall strength experiments in this study in combination with the literature data showed that the spall strength increases as a function of pressure, which is unusual in polymers and may be attributed to polyurea transforming to a glassy phase. In the shear strength experiments, the shear stress was shown to increase with increasing longitudinal stress in polyurea, similar to estane, another elastomer.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 25, 2022
- Source ID
- 10.1063/5.0082477
Entities
People
- Daniel Casem
- J L Jordan
- Jason Robinette
Organizations
- Los Alamos National Laboratory
- United States Army Combat Capabilities Development Command
- United States Army Research Laboratory