The effect of rubber micro-particles and silica nano-particles on the tensile fatigue behaviour of a glass-fibre epoxy composite

摘要

It is clcar that incorporation of either CTBN rubber micro-particles or the silica nano-particles alone in the epoxy matrix have almost a similar beneficial effect on the fatigue performance of the GFRP composites In addition to raising the fatigue limit by about 15%,these particles enhance the fatigue life of GFRP componsite by about two to three times whe compared to the neat-resin matrix composite Furthermore the presence of both rvbber and silica particles in the matrix to give a ‘hybrid’modified GFRP results in further enhancement of the fatigue life,particularly at the low stress ranges. Indeed, the fatigue limit was further raised by about 25%due to the presence of both these types of particles .The suppressed extent of matrix cracking and reduccd delanmination growth rate in the composites based upon the modified matriccs appears to be the main reasons for the observed enhancement of the fatigue lives of these GFRP composites.