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Fatigue behavior and life prediction of PI/SiO 2 nanocomposite films
Author(s) -
Wang Z. D.,
Zhao X. X.
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29767
Subject(s) - materials science , composite material , hysteresis , hardening (computing) , polyimide , modulus , nanocomposite , softening , creep , tension (geology) , viscoelasticity , ultimate tensile strength , layer (electronics) , condensed matter physics , physics
In this report, the fatigue behavior and lifetime of Polyimide/silica (PI/SiO 2 ) hybrid films are investigated. To evaluate the fatigue property of this class of hybrid films, the stress‐life cyclic experiments under tension–tension fatigue loading with 10 Hz of the frequency are performed, and the stress ratio is 0.1. Dynamic creep and cyclic softening/hardening are analyzed based on the change of hysteresis loops during the fatigue process. The structure‐property relations are discussed to further understand their phenomenon and deformation mechanisms. To predict the fatigue life of this class of hybrid films, a semiempirical model is proposed based on fatigue modulus concept. The simulated results are well agreeable with the testing values. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009