Qi Dongtao,Cheng Guangxu,Duan Quan,Wei Shenggui
(School of Environmental and Chemical Engineering,Xi'an Jiaotong University,Xi'an 710049, China)
Abstract:A multiaxial fatigue damage parameter for fibre-reinforced composite was presented based on critical plane approach and the multiaxial fatigue damage characteristics of composite were investigated. Using newly developed filament-wound composite tubular specimens,the tension-torsion biaxial loading fatigue tests were performed. The damage parameter versus fatigue life figures,which were plotted based on the stress-strain analysis and test results,could be used to predict the fatigue lives of the composite with different winding angles.It shows that the damage parameter is more suitable for composite multiaxial fatigue investigation than the traditional strain versus life curve and the predicted fatigue lives have a good agreement with the tested values.
Keywords:fibre-reinforced composite;multiaxial fatigue;critical plane approach
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