Mechanical behaviors of carbon fiber composite sandwich columns with three dimensional honeycomb cores under in-plane compression |
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| Affiliation: | 1. Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150001, China;2. Research Institute of Material Science and Technology (INTEMA), National University of Mar del Plata (UNMdP), Mar del Plata, Argentina;3. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, China;4. Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing 100076, China;1. Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150001, PR China;2. Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA;3. Department of Mechanical and Industrial Engineering, Qatar University, Doha, Qatar;1. School of Traffic & Transportation Engineering, Central South University, Changsha, Hunan, China;2. Key Laboratory of Traffic Safety on Track, Ministry of Education, Changsha, China;3. Department of Mechanical Engineering, University of New Orleans, USA;1. State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science & Technology, Nanjing 210007, China;2. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;3. College of Engineering, Peking University, Beijing 100871, China;1. School of Mechanical and Chemical Engineering, University of Western Australia, Perth, WA 6009, Australia;2. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, PR China;1. Poznan University of Technology, Institute of Mathematics, Poznan, Poland;2. Poznan University of Technology, Institute of Applied Mechanics, Poznan, Poland |
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| Abstract: | Mechanical properties and failure modes of carbon fiber composite egg and pyramidal honeycombs cores under in plane compression were studied in the present paper. An interlocking method was developed for both kinds of three-dimensional honeycombs. Euler or core shear macro-buckling, face wrinkling, face inter-cell buckling, core member crushing and face sheet crushing were considered and theoretical relationships for predicting the failure load associated with each mode were presented. Failure mechanism maps were constructed to predict the failure of these composite sandwich panels subjected to in-plane compression. The response of the sandwich panels under axial compression was measured up to failure. The measured peak loads obtained in the experiments showed a good agreement with the analytical predictions. The finite element method was used to investigate the Euler buckling of sandwich beams made with two different honeycomb cores and the comparisons between two kinds of honeycomb cores were conducted. |
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| Keywords: | A. Honeycomb B. Mechanical properties C. Analytical modelling D. Mechanical testing |
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