Impact perforation behavior of CFRPs using high-velocity steel sphere |
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| Affiliation: | 1. Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta 4259, Midori, Yokohama 226-8503, Japan;2. Central Technical Research Laboratory, Nippon Mitsubishi Oil Corporation, Chidori 8, Naka, Yokohama 231-0815, Japan;1. Fundamental Science on EHF Laboratory, University of Electronic Science and Technology of China, Chengdu 611731, China;2. School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;3. Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, Guilin University of Electronic Technology, Guilin 541004, China;1. Commissariat à l''Energie Atomique et aux Energies Alternatives (CEA)/Le Ripault, BP 16, 37260 Monts, France;2. SociétéEC2-MODELISATION, 66, Boulevard Niels Bohr, 69603 Villeurbanne Cedex, France;3. Université de Lyon, LaMCoS, INSA-Lyon, CNRS UMR5259, F-69621, France BâtimentJacquard, 27 Av. Jean Capelle, 69621 Villeurbanne Cedex, France;1. Department of Chemical Engineering Materials Environment, Sapienza Università di Roma and UdR INSTM, Italy;2. Department of Continuum Mechanics and Structural Analysis, Universidad Carlos III de Madrid, Spain;3. Institute for Polymers, Composites and Biomaterials, National Research Council, Pozzuoli, Naples, Italy;4. Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Italy |
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| Abstract: | In order to investigate impact perforation behavior of Carbon Fiber Reinforced Plastics (CFRPs), a steel sphere having a velocity of 500–1230 m/s was impacted to several kinds of CFRP laminate specimens consisting of different carbon fibers, interlaminate sequence, configuration; cross-ply or woven cloths, or thickness. The perforation behaviors were evaluated by absorbed energies during perforation, morphological in situ observations using high-speed framing cameras and postmortem observations. Spheres penetrated specimens in a fluid manner on the front surface, and perforated them in an extrusive manner on the rear surface in case of thick specimens. In case of thin specimens, on the contrary, spheres perforated specimens in fluid manner on the rear surface. In the fluid manner energy absorption was independent of the static mechanical properties of the fibers. In extrusion the energy absorption depended on the static tensile fracture energy of the fiber: high fracture energy resulted in large energy-absorption. The boundary velocities in changing failure modes depended on the tensile moduli of the reinforced fibers. Failure modes were significantly affected by the mechanical properties of the fiber: with low strength or fracture strain of reinforced carbon fiber, the specimens showed plugging fractures on the rear surfaces. With high strength and fracture strain, the specimens showed larger delamination on both surfaces. |
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