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Caltech ASC: Detonation and Detonation-Driven Fracture
We are carrying out experiments and analyses in support of the Caltech
ASC Center for Simulation of
Dynamic Response of Materials.
Detonation-Driven Fracture Database
Selected data from experiments on detonation driven fracture experiments carried out since 2002 are
available for downloading here.
- 2002 Linear elastic
Pressure and strain data from the original experiments by Tony Chao on from 2002 PVP paper. Use the 2005
data instead for validation of strain computations.
- 2003-4 Fracture
Data from Tong-Wa (Tony) Chao's thesis research given in
engineering units can be downloaded as asci text files. Summary plots and
documentation of the experiments are available in an online version of Chao's PhD
dissertation.
- 2005 Vibrometer measurements These are
strain data obtained by Florian Pintgen using both the optical vibrometer and glue-on strain gages. The tube
was sectioned to determine the wall thickness variation.
Recent Publications
Summary Reports
Detonation-driven fracture
- (PDF)
T.-W. Chao and J. E. Shepherd "Fracture Response of Externally-Flawed
Cylindrical Shells to Internal Gaseous Detonation Loading". PVP2002-1491,
2002 AMSE Pressure Vessels and Piping Conference, Vancouver, BC, August 5-9, 2002. Published in
Emerging technologies in Fluids, Structures, and Fluid-Structure Interactions, PVP Vol. 462-2, 85-98, 2002.
- (PDF)
T.-W. Chao and J. E. Shepherd "Comparison of Fracture Response of Preflawed
under Internal Static and Detonation Loading". PVP2003-1957,
2003 AMSE Pressure Vessels and Piping Conference, Cleveland, OH,
July 20-24, 2003. Published in 7th International Symposium
on Emerging Technologies in Fluids, Structures, and Fluid-Structure
Interactions, PVP Vol. 460, 129-144, 2003.
- (PDF) Tong Wa Chao.
Gaseous Detonation-Driven Fracture of Tubes.
PhD thesis, California Institute of Technology, Pasadena, California, March 2004.
- (PDF) T. Chao and J.E. Shepherd.
Detonation loading of tubes in the modified shear wave regime.
In Proceedings of the 24th International Symposium on Shock Waves.
Paper 1642, to be presented at 24th ISSW, Beijing, China, July 11-16, 2004.
- (PDF) T.-W. Chao and J. E. Shepherd.
Comparison of fracture response of preflawed tubes under internal static and detonation loading.
Journal of Pressure Vessel Technology, 126(3):345-353, August 2004.
- (PDF) T.-W. Chao and J. E. Shepherd.
Fracture response of externally flawed aluminum cylindrical shells under internal gaseous detonation loading.
International Journal of Fracture, 134(1):59-90, July 2005.
Preprint, see journal for final version - DOI: 10.1007/s10704-005-5462-x.
Detonation Structure
- (PDF) S. Singh, D. Lieberman, and J. E. Shepherd. Combustion behind
shock waves. Paper 03F-29 Western States Section/Combustion
Institute, October 2003.
- (PDF) A. M. Khokhlov, J. M. Austin, F. Pintgen, and J. E. Shepherd.
Numerical study of the detonation wave structure in ethylene-oxygen
mixtures. 42nd AIAA Aerospace Sciences Meeting and Exhibit, January
5-8, 2004, Reno, NV, AIAA 2004-0792.
- (PDF)
F. Pintgen and J. E. Shepherd. Quantitative analysis of reaction
front geometry in detonation. In G.D. Roy, A.A. Berlin, S.M. Frolov,
J.E. Shepherd, and S.A. Tsyganov, editors, International colloquium on
application of detonation for propulsion.
- (PDF) J. M. Austin, F. Pintgen, and J. E. Shepherd.
Lead shock oscillation and decoupling in propagating detonations.
43nd AIAA Aerospace Sciences Meeting and Exhibit, January 10-13, 2005, Reno, NV, AIAA 2005-1170, 2005.
- (PDF) J. M. Austin, F. Pintgen, and J. E. Shepherd. Reaction zones in
highly unstable detonations. In Proceedings of the 30th Combustion Institute, number 2, pages 1849-1857, 2005.
doi 10.1016/j.proci.2004.08.157.
- (PDF) F. Pintgen and J. E. Shepherd.
Stereoscopic imaging of transverse detonations in diffraction.
5th Pacific Symposium on Flow Visualisation and Image Processing 27-29th September, 2005, Australia (paper PSFVIP-5-250), 2005.
Detonation Simulation
- (PDF)
M. Arienti and J.E. Shepherd. A numerical study of detonation diffraction.
J. Fluid Mech., 529:117 - 146, 2005.
- (PDF)M. Arienti and J.E. Shepherd.
The role of diffusion in irregular detonations.
The 4th Joint Meeting of the US Sections of the Combustion Institute, Philadelphia, PA, March 20-23, 2005.
- (PDF)
P. Hung and J.E. Shepherd. Initiation of a stabilized detonation by a projectile. In Proceedings of the
24th International Symposium on Shock Waves. Paper 1643, to be presented at 24th ISSW, Beijing,
China, July 11-16, 2004.
Presentations
Some information about validation and detonation-related ASC sponsored activities is
given in the recent site visit review presentations.
Apr 2006 Review
Detonation simulation, crossover effect, detonation stability, detonation-driven fracture validation experiments (pdf)
Movies:
- Pseudo-intermediate species ("OH") spatial-temporal evolution, Case 1 (regular cellular structure) (1.5 MB mpg)
- Pseudo-intermediate species ("OH") spatial-temporal evolution, Case 2 (irregular cellular structure) (2.5 MB mpg)
Oct 2005 Review
Detonation-driven fracture experiments: Flexural wave validation exercise (pdf)
Posters:
- Flexural Waves in Detonation Tubes (Pintgen, Cirak, Shepherd)
(pdf)
- Blast wave measurements in the dybnamic fracture experiment (Krok, Karnesky, Pintgen, Shepherd)
(pdf)
Oct 2004 Review
Detonation and Detonation-driven fracture experiments (pdf)
Movies:
Posters:
- CT 1 - Structure of gaseous detonations (Austin, Pintgen, Khokhlov, Shepherd)
(pdf)
- VAL 6 - Quantitative Analysis of OH laser induced fluoresence intensity
in detonations (Pintgen, Shepherd)
(pdf)
- VAL 11 - Experiments on Fluid-Solid Interaction: Detonation Driven
Fracture of Tubes (Chao, Shepherd)
(pdf)
- VAL 13 - Diffraction of detonation waves (Pintgen, Shepherd)
(pdf)
October 2003 Review
Detonation-driven fracture validation presentation
October 2002 Review
HE presentation
Movies:
- Projectile initiated detonation (12 MB AVI)
- Detonation diffraction around a projectile - detailed vs reduced chemistry (2.4 MB AVI)
- Detonation diffraction around a corner (12 MB MOV)
- Detonation diffraction around a corner (12 MB MOV)
Older Presentations
The Caltech ASCI ASAP Center for the Dynamic Simulation of Materials
was revamped in 2002 and the HE group formerly led by Joe Shepherd was
disbanded. Detonation and HE research no longer exists as a separate
component in Phase II (2002-2007) of the Caltech ASC Center.
The old (1997-2002) Caltech ASCI High Explosives group web page is no longer available.
Links for older presentations are given below.
Older Publications
The older publications of the HE group can be downloaded from the Explosives Dynamics
Laboratory
publications web page and most
ASCI-sponsored publications can be downloaded from the Caltech center publications
list.
Joe Shepherd and his research group continue to
carry out an active program of research on detonation and explosions.
Information about current projects can be found on the EDL
web pages or Joe Shepherd's
home page
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