Note: Dynamic meso-scale full field surface deformation measurement of heterogeneous materials
Abstract
A dynamic experiment at mesoscale is developed to measure local deformation and strain in granular materials at high temporal and spatial resolutions. The experimental setup is comprised of a high-speed camera along with a high magnification extension tube. The method is demonstrated by measuring the full field strain across and in the boundary of the crystals at a high temporal resolution in polymer bonded sugar crystals and glass beads filled epoxy particulate composite specimens under dynamic loading. In both cases, the local strain heterogeneity is captured successfully. The measured strain and deformation field can be further used to obtain the relative motion of each crystal, crystal rotation, and the relative displacement between the polymer interface and the crystal, which are very critical to understand the local failure mechanisms in heterogeneous materials.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 01, 2016
- Source ID
- 10.1063/1.4944488
Entities
People
- Addis Kidane
- Addis Tessema
- S. Ravindran
Organizations
- Air Force Office of Scientific Research
- University of South Carolina