U.S. Department of EnergyOffice of Scientific and Technical Information
Predictive simulation and experimental confirmation of the onset of instability of explosively driven shells
Abstract
The detonation of explosives with thin shells can cause the shells to expand to over 200% strain at strain rates on the order of 10{sup 4} s{sup -1} before failure. Experimental data indicate the development and growth of multiple plastic instabilities lead to the formation of failure and fragmentation in the near periodic pattern. Presented are comparisons of the onset of instabilities from simulations and experimental data. At Los Alamos National Laboratory material models have been evolving for several years to simulate high strain-rate behavior. Our models include the effects of shock heating and damage evolutions as well as failure. The current edition of one of our models uses a tabular EOS, the PTW strength model, a modified Gurson yield surface to compute damage evolution, and a Johnson-Cook failure model. Presented are some of the details of these models. An experiment confirmed the temperature discontinuities.
- Authors:
-
- Los Alamos National Laboratory
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1011478
- Report Number(s):
- LA-UR-10-03014; LA-UR-10-3014
TRN: US201109%%454
- DOE Contract Number:
- AC52-06NA25396
- Resource Type:
- Conference
- Resource Relation:
- Conference: 7th International Symposium on Impact Engineering ; July 4, 2010 ; Warsaw, Poland
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 42 ENGINEERING; EXPLOSIONS; EXPLOSIVES; FRAGMENTATION; INSTABILITY; LANL; PLASTICS; SHOCK HEATING; SIMULATION; STRAIN RATE; STRAINS
Citation Formats
Potocki, Mark L, and Hull, Lawrence M. Predictive simulation and experimental confirmation of the onset of instability of explosively driven shells. United States: N. p., 2010.
Web.
Potocki, Mark L, & Hull, Lawrence M. Predictive simulation and experimental confirmation of the onset of instability of explosively driven shells. United States.
Potocki, Mark L, and Hull, Lawrence M. 2010.
"Predictive simulation and experimental confirmation of the onset of instability of explosively driven shells". United States. https://www.osti.gov/servlets/purl/1011478.
@article{osti_1011478,
title = {Predictive simulation and experimental confirmation of the onset of instability of explosively driven shells},
author = {Potocki, Mark L and Hull, Lawrence M},
abstractNote = {The detonation of explosives with thin shells can cause the shells to expand to over 200% strain at strain rates on the order of 10{sup 4} s{sup -1} before failure. Experimental data indicate the development and growth of multiple plastic instabilities lead to the formation of failure and fragmentation in the near periodic pattern. Presented are comparisons of the onset of instabilities from simulations and experimental data. At Los Alamos National Laboratory material models have been evolving for several years to simulate high strain-rate behavior. Our models include the effects of shock heating and damage evolutions as well as failure. The current edition of one of our models uses a tabular EOS, the PTW strength model, a modified Gurson yield surface to compute damage evolution, and a Johnson-Cook failure model. Presented are some of the details of these models. An experiment confirmed the temperature discontinuities.},
doi = {},
url = {https://www.osti.gov/biblio/1011478},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}