Fatigue Behavior of Composite Sandwich Panels Under Three Point Bending Load |
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| Affiliation: | 1. Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;1. Department of Ocean and Mechanical Engineering, Florida Atlantic University, 777, Glades Road, Boca Raton, FL 33431, USA;2. Structural Strength Department, Research Laboratory, IHI Corporation, 1, Shin-nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa 235-8501, Japan;1. Department of Civil Engineering, Queen’s University, Canada;2. Donald and Sarah Munro Chair Professor in Engineering and Applied Science, Department of Civil Engineering, Queen’s University, Canada;1. College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China;2. School of Civil Engineering, Southeast University, Nanjing 210096, China;3. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China;1. Université Mohamed Seddik Ben Yahia, Jijel, Algeria;2. Laboratoire de Mécanique Appliquée des Nouveaux Matériaux (LMANM), Université 8 Mai 1945, Guelma, Algeria;3. Advanced Composites Centre for Innovation and Science (ACCIS), University of Bristol, BS8 1TR Bristol, UK |
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| Abstract: | In this paper, the bending fatigue tests of honeycomb sandwich panels are carried out by using an improved three-point bending test fixture, and the S-N curves at different stress ratios are obtained. Through the records of fatigue damage in the experiment, the failure mode of the honeycomb sandwich panels and the source of fatigue damage are determined. At the same time, through the calculation of the shear stress distribution on the honeycomb wall, the reasons for the difference in the failure morphology of the L-direction and W-direction sandwich panels are clarified. Besides, a life prediction method is proposed and its effectiveness in predicting the fatigue life of sandwich panels has been verified. |
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| Keywords: | Composite sandwich panels Fatigue damage Fatigue failure mode Micro cracks Life prediction |
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