FATIGUE PROPERTIES OF REINFORCED PP AND PC WELDED JOINTS

Abstract

The research of fatigue properties of welded joints is mainly aimed at metal materials. However, welding of plastics and composites is recently more frequent due to extensive growth of plastic welding applications. Fatigue behavior of reinforced composite welded joints is still object of research. There is much blank space for studying and that is also a motivation. Besides the fatigue strength research, the object of interest was to survey the influence of filling of glass fibers on the welded joint strength. Fatigue strength of welded joints is measured by the lap shear strength test method. The composite materials, welding parameters and testing methods are described in the next paragraph. The fatigue tests are evaluated, and results are discussed, and the S-N curves are derived.