Fatigue of glass-polyester composite immerged in water

A composite glass fiber laminated polyester resin have been aged in liquid water at 25°c and tested using cyclic fatigue test with three-point bending. mechanical analyses have been carried out using wohler curve before and after immersion in water,the effect of such water uptake with immersion time on laminate fatigue life after fatigue cycling is described. it was found that for various periods of immersion,the composites experienced significant reduction of the life time by deterioration of fiber matrix interface,and increase on the weight by water absorption. these are attributed to the function of the water molecules penetrated in the composites. © school of engineering,taylor’s university.