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Title Fracture model for high-energy propellant. Annual report
Creator/Author Murri, W.J. ; Seaman, L.
Publication Date1981 Dec 01
OSTI IdentifierOSTI ID: 5664517; DE84000170
Report Number(s)UCRL-15552
DOE Contract NumberW-7405-ENG-48
Resource TypeTechnical Report
Research OrgSRI International, Menlo Park, CA (USA)
Subject450100 -- Military Technology, Weaponry, & National Defense-- Chemical Explosions & Explosives; ;PROPELLANTS-- DETONATIONS;PROPELLANTS-- FRACTURES; COMPRESSION;FRAGMENTATION;GASES;IMPACT SHOCK;SIMULATION
Related SubjectFAILURES;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 PublicationUnited States
LanguageEnglish
FormatPages: 24
AvailabilityNTIS, PC A02/MF A01.
System Entry Date2001 May 13

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