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High-speed x-ray phase contrast imaging and digital image correlation analysis of microscale shock response of an additively manufactured energetic material simulant
- Source :
- Journal of Applied Physics. 127:235902
- Publication Year :
- 2020
- Publisher :
- AIP Publishing, 2020.
-
Abstract
- The performance of energetic materials subjected to dynamic loading significantly depends on their micro- and meso-scale structural morphology. The geometric versatility offered by additive manufacturing opens new pathways to tailor the performance of these materials. Additively manufactured energetic materials (AMEMs) have a wide range of structural characteristics with a hierarchy of length scales and process-inherent heterogeneities, which are hitherto difficult to precisely control. It is important to understand how these features affect AMEMs’ response under dynamic/shock loading. Therefore, temporally and spatially resolved measurements of both macroscopic behavior and micro- and meso-level processes influencing macroscopic behavior are required. In this paper, we analyze the shock compression response of an AMEM simulant loaded under several impact conditions and orientations. X-ray phase contrast imaging (PCI) is used to track features across the observed shock front and determine the linear shock velocity vs particle velocity equation of state, as well as to quantify the interior deformation fields via digital image correlation (DIC) analyses. Photon Doppler velocimetry is simultaneously used to measure the particle velocities of the specimens, which are consistent with those obtained from x-ray PCI. The DIC analyses provide an assessment of the average strain fields inside the material, showing that the average axial strain depends on the loading intensity and reaches as high as 0.23 for impact velocities up to 1.5 km/s. The overall results demonstrate the utility of x-ray PCI for probing “in-material” equation of state and interior strains associated with dynamic shock compression behavior of the AMEM simulant.
- Subjects :
- 010302 applied physics
Digital image correlation
Materials science
Phase-contrast imaging
General Physics and Astronomy
02 engineering and technology
Mechanics
021001 nanoscience & nanotechnology
01 natural sciences
Shock (mechanics)
Dynamic loading
Shock response spectrum
0103 physical sciences
Particle velocity
Deformation (engineering)
0210 nano-technology
Microscale chemistry
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 127
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........68b4403b4f56509b8d29511d73f73d0f
- Full Text :
- https://doi.org/10.1063/5.0003525