Accession Number : ADB077088
Title : The Effect of Temperature and Strain Rate on the Impact Fracture Toughness of Plastic Q and the Relationship with Dynamic Mechanical Loss Transitions.
Descriptive Note : Technical memo.,
Corporate Author : WEAPONS SYSTEMS RESEARCH LAB ADELAIDE (AUSTRALIA)
Personal Author(s) : Fong,C. W.
Report Date : FEB 1981
Pagination or Media Count : 33
Abstract : The impact fracture toughness of Plastic Q has been determined by fracture mechanics over the temperature range from 20deg C to -70deg C. A major peak in fracture toughness at -10deg C has been found to correspond to a secondary loss transition in plasticized cellulose acetate. At -10deg C, the fracture toughness is directly proportional to the log of the maximum strain rate. There appears to be some evidence for a plane strain to plane stress transition with varying specimen thickness and temperature.
Descriptors : *GUN PROPELLANTS, *LOADS(FORCES), *FRACTURE(MECHANICS), *MECHANICAL PROPERTIES, CELLULOSE ACETATES, TEMPERATURE, STRAIN RATE, IMPACT SHOCK, TOUGHNESS, STRESSES, IMPACT TESTS
Subject Categories : Ammunition and Explosives
Distribution Statement : APPROVED FOR PUBLIC RELEASE