Quantitative In Situ Studies of Dynamic Fracture in Brittle Solids Using Dynamic X-ray Phase Contrast Imaging
- Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Materials Science and Engineering and Hopkins Extreme Materials Inst.
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS) and Dynamic Compression Sector (DCS)
- Army Research Lab., Adelphi, MD (United States). Weapons and Materials Research Directorate
- Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Materials Science and Engineering
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Johns Hopkins Univ., Baltimore, MD (United States). Hopkins Extreme Materials Inst. and Dept. of Mechanical Engineering
We demonstrate the use of X-ray phase contrast imaging with sub-microsecond temporal resolution to obtain quantitative visualization of dynamic fracture processes in brittle solids. We examine an amorphous solid (fused silica), a ceramic single crystal (single-crystal quartz), and a polycrystalline ceramic (boron carbide), in the form of single-edge notched specimens loaded using a three-point apparatus at nominal strain rates up to ~800 s–1. We observe that the crack tip speed for boron carbide is relatively independent of mode I stress intensity factor rate (K˙I) for these rates of loading, while that of fused silica and single-crystal quartz increases with K˙I. Further, for the amorphous and single crystal cases, we observe the development of a crack tip instability in the form of crack branching as the crack tip speed approaches 45% of the Rayleigh wave speed. This suggests that strain-rate-dependent mechanisms contribute to crack branching. Such mechanisms may, in turn, affect the macroscopic fracture properties of these materials.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Washington State Univ., Pullman, WA (United States). Inst. of Shock Physics
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; Defense Threat Reduction Agency (DTRA); US Army Research Laboratory (USARL); USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- Contributing Organization:
- Washington State Univ., Pullman, WA (United States). Inst. for Shock Physics and Dynamic Compression Sector (DCS)
- Grant/Contract Number:
- AC52-06NA25396; HDTRA1-15-1-0056; W911NF-12-2-0022; NA0002442; AC02-06CH11357
- OSTI ID:
- 1473815
- Alternate ID(s):
- OSTI ID: 1484023; OSTI ID: 1571759
- Report Number(s):
- LA-UR-18-20842
- Journal Information:
- Experimental Mechanics, Vol. 58, Issue 9; ISSN 0014-4851
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Challenges to model the role of heterogeneities on the shock response and spall failure of metallic materials at the mesoscales
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journal | December 2019 |
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