Comparative study of dynamic and static delamination behaviour of carbon fibre/epoxy composite laminates |
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| Affiliation: | 1. Department of Mechanics and Building Structures, Warsaw University of Life Sciences, Nowoursynowska Str. 166, 02-787 Warsaw, Poland;2. Institute of Machine Tools and Production Engineering, Lodz University of Technology, Stefanowskiego Str. 1/15, 90-924 Lodz, Poland;3. Department of Structural Mechanics, Lodz University of Technology, al. Politechniki 6, 90-924 Lodz, Poland;1. Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia;2. Low Dimensional Materials Research Centre, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia;1. Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211, China;2. Laboratory of Infrared Materials and Devices, The Research Institute of Advanced Technologies, Ningbo University, Ningbo, Zhejiang 315211, China;1. Thin Film Laboratory, Semiconductor & Nano-ScienceLabs., Department of Physics, Faculty of Education, Ain Shams University, Roxy, 11757 Cairo, Egypt;2. Department of Physics, Faculty of Science and Arts, Aljouf University, Aljouf, Saudi Arabia;3. Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia;4. Centre of Nanotechnology, King Abdul Aziz University, Jeddah, Saudi Arabia;1. Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China;2. Shanxi Key Laboratory of Material Strength & Structural Impact, Taiyuan, Shanxi 030024, China;3. Department of Aeronautical Structure Engineering, School of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China;4. State Key Laboratory of Explosion & Impact and Disaster Prevention and Mitigation, Army Engineering University of PLA, Nanjing, Jiangsu 210007, China |
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| Abstract: | Dynamic and static delamination characteristics of two unidirectional carbon fibre-reinforced epoxy composite laminates (Hercules MI 1610 and Torayca T300) have been studied under impact and low-speed (2 mm min1) test conditions. The influence of interlaminar reinforcement with chopped Kevlar fibres on toughness has also been examined. The quasi-static or low-speed delamination tests were conducted with the usual double cantilever beam, end-notched flexure and mixed-mode flexure specimens. To determine the corresponding mode I, mode II and mixed-mode toughnesses under the impact condition, a special specimen design has been adopted and tests were performed with a Charpy impact machine. The novel aspect of the test scheme in the present study is that a single-plane delamination surface with a well-defined fracture mode has been obtained. The dynamic and static delamination characteristics of the same fracture mode were then studied by scanning electron microscopy, and special features were compared. While interlaminar reinforcement with a small amount of chopped Kevlar fibres resulted in an appreciable increase in the quasi-static delamination toughness, it was less effective under the impact condition. |
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