Fibre bridging effect on the Paris relation of mode I fatigue delamination in composite laminates with different thicknesses

摘要: Abstract Fatigue delamination with fibre bridging in composite laminates different thicknesses was investigated. The experimental results clearly demonstrated had significant retardation effects on fatigue behavior, making it insufficient to use a single Paris resistance curve determine crack growth. To address this problem, the coefficients of relation were correlated normalized extension (a − a0)/Lpz. It found that exponent n independent and specimen thickness, whereas parameter log(c) bi-linearly decreased kept constant once became saturation. And magnitude thickness. Thus, concluded behavior significance thickness at given With substitutions these correlations into relation, an empirical power law developed characterize behavior. its validation verified by comparison between predictions experiments.