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Effects of Relaxed Modulus on the Structure Integrity of NEPE Propellant Grains during High Temperature Aging
Author(s) -
Sui Xin,
Wang Ningfei,
Wan Qian,
Bi Shihua
Publication year - 2010
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.200800054
Subject(s) - propellant , modulus , composite material , materials science , structural integrity , solid fuel rocket , chemistry , structural engineering , organic chemistry , engineering
Abstract The nitrate ester plasticized polyether (NEPE) propellants were accelerated aged at 65, 70, and 75 °C, respectively. The dynamic mechanical properties of NEPE propellants were determined with the dynamic mechanical analysis method. The strength limit of NEPE propellants was tested by the uniaxial tension test. The relaxed modulus and strength limit both decreased. By calculating the structural integrity of NEPE grain, the effects of modulus changes on the structure integrity were analyzed. The results provide a reference for the life prediction of solid rocket motor containing an NEPE propellant.