Macroscopic observables experimentally linked to microscopic processes in the explosive fracture and fragmentation of metals
- Los Alamos National Laboratory
The response of a metal element to explosive loading depends on a broad spectrum of explosive and metal properties, macroscopic geometry plays a crucial role in defining the localized loading history and the resulting gradients of interest, while microscopic effects and defects are generally believed responsible for damage nucleation. Certain experiments reduce the complexity by producing conditions that are uniform in some sense, allowing dynamic measurement of variables that can be correlated with corresponding microscopic effects observed in recovery experiments. Spherical expansion of thin shells, that eventually fragment, and steady wave loading of flat plates are two such experiments. Proton radiography, x-radiography, laser velocimetry, imaging IR, and visible light photography all have produced dynamic measurements in 4340 steel, copper, uranium alloys, tantalum, and titanium. Correlation of the macroscopic measurements with microscopy on recovered samples has been done with a statistical approach.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1044895
- Report Number(s):
- LA-UR-10-08364; LA-UR-10-8364; TRN: US201214%%563
- Resource Relation:
- Conference: International symposium on plasticity 2011 ; January 3, 2011 ; Puerto Vallarta, Mexico
- Country of Publication:
- United States
- Language:
- English
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