Correlations among void shape distributions, dynamic damage mode, and loading kinetics [Correlations among spall void shape distributions, damage mode and shock loading kinetics]
- Univ. of New South Wales, Canberra (Australia). School of Engineering and Information Technology
- Arizona State Univ., Tempe, AZ (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Peac Institute of Multiscale Sciences, Chengdu (People's Republic of China)
- Argonne National Lab. (ANL), Lemont, IL (United States)
Here, three-dimensional x-ray tomography (XRT) provides a nondestructive technique to characterize the size, shape, and location of damage in dynamically loaded metals. A shape-fitting method comprising the inertia tensors of individual damage sites was applied to study differences of spall damage development in face-centered-cubic (FCC) and hexagonal-closed-packed (HCP) multicrystals and for a suite of experiments on high-purity copper to examine the influence of loading kinetics on the spall damage process. Applying a volume-weighted average to the best-fit ellipsoidal aspect-ratios allows a quantitative assessment for determining the extent of damage coalescence present in a shocked metal. It was found that incipient transgranular HCP spall damage nucleates in a lenticular shape and is heavily oriented along particular crystallographic slip directions. In polycrystalline materials, shape distributions indicate that a decrease in the tensile loading rate leads to a transition to coalesced damage dominance and that the plastic processes driving void growth are time dependent.
- Research Organization:
- Arizona State Univ., Tempe, AZ (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- NA0002917; 20060021DR; 20100026; FG52-06NA26169; FG52-10NA29653; NA0002005; 35561; AC52-06NA25396
- OSTI ID:
- 1356662
- Alternate ID(s):
- OSTI ID: 1459809; OSTI ID: 1885648
- Report Number(s):
- LA-UR-16-26838; PII: 2178
- Journal Information:
- JOM. Journal of the Minerals, Metals & Materials Society, Vol. 69, Issue 2; ISSN 1047-4838
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Spallation of polycarbonate under plate impact loading
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journal | August 2019 |
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