Fatigue life prediction of glass reinforced composite materials using Weibull distribution
Djamel Djeghader, Bachir Redjel
Quarterly No. 3, 2019 pages 100-106
DOI:
keywords: glass, polyester, fatigue life, Weibull distribution, mean life, survival probability
abstract Cyclic bending fatigue tests were conducted on randomly oriented short multidirectional glass fiber-reinforced polyester matrices. Standard test specimens were manufactured in rectangles with a volume fraction of 40% glass fibers. The experimental fatigue life results were fitted using S-N curves, which are based on power function equations. S-N curves, which are characterized by important and significant scatter over the lifetime, were correlated using the two-parameter Weibull distribution function to determine the probability of failure and to plot the S-N curves at different reliability levels. These curves are of considerable design value in practical applications of composite materials and predict the sample response at the time of service depending on the degree of reliability.