Fatigue life of composite beam manufacture from fiberglass Material
Basim Ajel Sadkhan†*, Salman Hussien Omran‡
†Mechanical Engineering Department, Al-Mustansirya University Engineering College, Iraq.
‡Energy and renewable energies technology center, University of technology-Iraq.
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Influence the fatigue behaviors theoretically and experimentally of the material that is manufactured through the stacking of four E-glass fiber layers in a variety of the orientations of the angle (0°, ± 45°and 90°) immersed in polyester resin in a (4mm) thickness. Tested under 2 dynamic load types as fatigue testing in fully reversible spectrum load at (R=-1) and tension load, to determine life curves and examine the fracture areas and affected of stress. To evaluate the composite behavior under fatigue conditions, finite element analysis (FEA) has been used. The resulting of fatigue testing has shown that the fatigue degradation has maximal strength and the unxial composite is the highest as well]. The method of high magnification optical microscopy has shown that the lamina sat failure ( ± 45°and 0o/ 90° ) is caused because the matrix failure in the fiber direction, while for uni-directional lamina at 0o, failures occur because of the fiber breakages.