Open AccessEffect of prestrain on storage life for HTPB coating in solid rocket motor
Author(s) -
Yongqiang Du,
Jian Zheng,
Yanjing Yang,
Tingting Yang,
Xiaoyan Tu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/770/1/012021
Subject(s) - coating , materials science , elongation , composite material , ultimate tensile strength
The prestrain thermal accelerated aging tests of HTPB coating at 0%, 3%, 6% and 9% levels were carried out. The variation of maximum elongation of HTPB coating at different aging stages was analyzed. The maximum elongation was selected as the performance characterization parameter, and the aging model of HTPB coating was established. According to the time-temperature equivalence principle, the time conversion relationship between prestrain thermal accelerated aging and effective storage at room temperature was obtained, and the storage life of HTPB coating at room temperature was predicted using this model. The results show that the predicted storage life of HTPB coating at room temperature is 18.64a, 18.08a, 9.24a and 7.44a, respectively, under the aging conditions with prestrains of 0, 3, 6, and 9%. The existence of prestrain will have a significant impact on the storage life of HTPB coating, which should be avoided in actual storage.