Penetrator Resistance and Target Damage due to Multiple Impacts Upon Granite and Concrete:
Abstract
The objectives of this work were to develop first principle-based understanding of multiple impact, penetration, and damage accumulation in granite and concrete, and to develop a predictive model for multiple impact penetration. The extensive use of granite arid concrete in military applications provides motivation for this work. In order to understand the penetration process of granite and concrete dynamic and static material properties were determined as a function of induced damage. Quasi-static compression and tensile splitting experiments were conducted per ASTM Standards. Both the concrete and granite displayed a decrease in compressive strength as the damaged was increased. However, for the tensile splitting experiments it was found that the strength was highly dependent on the crack orientation. Dynamically the materials showed no decrease in compressive strength with increased damaged. The dynamic tensile strength of the materials did decrease with damage however they did not show the same orientation dependence as the static splitting strength. A series of multiple impact experiments were performed on both concrete and granite using ogive nose projectile made of maraging steel. An existing model, developed by M. Forrestal, was used to predict the single impact penetration into concrete. In order to predict the penetration of subsequent impacts, the model was modified to account for the material property changes as a function of damage induced by the previous impacts. The empirically based model agreed well with the experimental data.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2000
- Accession Number
- ADA378926
Entities
People
- Arun Shukla
- Martin Sadd
Organizations
- University of Rhode Island