Stability analysis of delaminated composite beams |
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| Affiliation: | 1. College of Engineering, Peking University, Beijing 100871, China;2. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;3. College of Mechanics and Materials, Hohai University, Nanjing 210098, China;4. National Center for Nanoscience and Technology, Beijing 100190, China;1. Groupe de Physique des Matériaux UMR 6634 CNRS, INSA Rouen, av. de l’Université, 76801 Saint Etienne du Rouvray, France;2. Université de Toulouse, INSA, UPS, Mines Albi – ICA/ISAE, 10 av. E. Belin, 31055 Toulouse, France;1. Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India;2. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India |
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| Abstract: | This study describes the dynamic stability of composite cantilever beams subjected to periodic axial loading with delaminations at pre-set locations. A computer code based on the finite element method is developed to calculate the natural frequencies, critical buckling loads and dynamic instability regions of the woven and laminated composite beams with different stacking sequences ([0]4, [0/90]s and [90]4), corresponding to this peculiar delamination case. The results of the developed code for the natural frequencies are compared with the natural frequencies obtained experimentally and numerically with commercial FEA (ANSYS). The critical buckling loads are also compared with the ones obtained from ANSYS simulations. |
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| Keywords: | A. Layered structures B. Buckling B. Vibration C. Finite element analysis (FEA) |
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