Bibliographic Citation
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Title | Fracture model for high-energy propellant. Annual report |
Creator/Author | Murri, W.J. ; Seaman, L. |
Publication Date | 1981 Dec 01 |
OSTI Identifier | OSTI ID: 5664517; DE84000170 |
Report Number(s) | UCRL-15552 |
DOE Contract Number | W-7405-ENG-48 |
Resource Type | Technical Report |
Research Org | SRI International, Menlo Park, CA (USA) |
Subject | 450100 -- Military Technology, Weaponry, & National Defense-- Chemical Explosions & Explosives; ;PROPELLANTS-- DETONATIONS;PROPELLANTS-- FRACTURES; COMPRESSION;FRAGMENTATION;GASES;IMPACT SHOCK;SIMULATION |
Related Subject | FAILURES;FLUIDS |
Description/Abstract | During the past year, we have successfully added a computational model of shock-initiation-of-detonation that supplements our previously-developed fracture model for high-energy propellants.^The resultant combined model allows computational simulations to be performed of cases where mechanically-produced fractures contribute to the initiation of detonation.^In the model, when the stress is compressive, the initiation routine is operative; when the stress is tensile, the fracture routine is operative.^The initiation routine contains a chemical reaction rate that is sensitive to the amount of fracture damage produced in the material, and therefore leads to enhanced reaction in previously fractured material during recompression.^These two routines were tested by computationally simulating a proposed one-dimensional impact experiment in which a propellant is fractured and then recompressed.^The results of this calculation indicated a reaction beginning in the damaged material at the time when the recompression started.^As the recompression continues, the calculation predicts a rapid increase in pressure signifying a detonation.^The model thus successfully describes fracture-enhanced reaction in a reasonable manner.^We have also conducted preliminary studies of how to model the influence of gas from chemical reactions occurring during compression on crack growth and fragmentation. |
Country of Publication | United States |
Language | English |
Format | Pages: 24 |
Availability | NTIS, PC A02/MF A01. |
System Entry Date | 2001 May 13 |
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