Penetration into Granular Earth Materials (Topic H): A Multi-scale Physics-Based Approach Towards Developing a Greater Understanding of Dynamically Loaded Heterogeneous Systems
Abstract
New experimental techniques have been developed to aid understanding of impact, penetration, and cavity formation associated with high-speed projectile penetration of sand. A new half-inch gun was constructed for this project. A "quarter-space" target geometry is used with a transparent window, coupled with high-speed photography and digital image correlation (DIC or PIV). These techniques are able to capture the bulk-to-grain response at impact velocities in a range from 30 to 350 m/s. Results indicate formation of stress bridges, dynamic grain damage, and fracture. The transmitted stress waves were captured using a quartz load cell, the results from which were compared to DIV measurements and simulations. The load cell provides high temporal resolutions however it averages over a large region(the face of the gage). The PIV technique provides information at the grain scale but suffers from low temporal resolution.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2016
- Accession Number
- AD1019655
Entities
People
- John Borg
Organizations
- Marquette University