Experimental study of micro-cracks in stress corrosion of fiber reinforced composites

Micro-cracks with a depth of 30-40 μm are formed on the surface of glass-fiber reinforced plastics (GFRP) rod, which could lead to the stress corrosion crack propagation along the original direction and developing dominant influence on the stress corrosion cracking (SCC) performance of the composite material. Micro-cracks with different depth and angles were simulated on the surface of GFRP rod. The strain response histories around the micro-crack during the whole stress corrosion test of the GFRP rod were obtained. The effects of depth and angle of micro-crack on SCC of GFRP rod were analyzed. The stress corrosion fracture times of GFRP rod with micro-cracks of different depth and angle were obtained.