Abstract
In this study, fatigue tensile fracture characteristic and damage propagation mechanism of triaxially-woven fabric (TWF) composite are investigated experimentally. Static tension and tension-tension fatigue tests on the TWF composite are conducted at room and high temperature to acquire ultimate tensile strength, trends of the tangent stiffness and S-N curves. Damage initiation and accumulation mechanism are also discussed based on X-ray CT scans. It is experimentally verified that static and fatigue characteristic of TWF has dependence on hygrothermal condition and failure mechanism under tensile loading is highly related to matrix failure on the intersection of the yarns.
