Abstract
The present work is dealing with the experimental investigation of the effect of moisture on the fatigue behaviour of fibre-reinforced composite materials. Flexural fatigue study of glass fibre-reinforced vinylester composite materials was undertaken in medium deflection levels. Typical fatigue tests (according to approved specifications) with dry and water-affected (30 up to 55 days in water) specimens of these materials were conducted on a three-point bending rig at a frequency of 2.4Hz. The fibre direction effect was also examined by using specimens cut in 0°, 45° and 90°. All tests were performed on a fully computerised small size fatigue testing machine especially design and built for the precise purpose.
