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Interfacial shear behavior of 3D composites reinforced with CNT-grafted carbon fibers
Authors:Lin Yang  Xiaodong He  Lei Mei  Liyong Tong  Rongguo Wang  Yibin Li
Affiliation:1. Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China;2. School of Naval Architecture, Harbin Institute of Technology at Weihai, Weihai 264209, China;3. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia;1. School of Materials Science and Engineering, Shandong University of Science and Technology, 266590 Qingdao, PR China;2. Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, 250061 Jinan, PR China;1. Aachen Institute for Advanced Study in Computational Engineering Science (AICES), RWTH Aachen University, 52062 Aachen, Germany;2. VIP&Bussiness Jet Service Subdivision, Aircrafts Maintenance and Engineering Corp.-Beijing (AMECO), 100621 Beijing, PR China;3. Institute of Mineral Engineering, Division of Materials Science and Engineering, Faculty of Georesources and Materials Engineering, RWTH Aachen University, 52064 Aachen, Germany;4. Institute of Solid Mechanics, Beihang University (BUAA), Beijing 100191, PR China;1. Department of Engineering Mechanics, Beijing University of Technology, Beijing 100124, China;2. Department of Civil and Architectural Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong;1. Department of Mechanical Engineering, Dong-A University, 37 Nakdong-daero 550 beon-gil, Saha-Ku, Busan 604-714, South Korea;2. Division of Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, San 56-1, Shillim-Dong, Kwanak-Ku, Seoul 151-742, South Korea;1. Institut de Science des Matériaux de Mulhouse, Université de Haute Alsace, CNRS-UMR 7361, 15 rue Jean Starcky, 68057 Mulhouse, France;2. EADS Astrium, Avenue du Général Niox, 33165 Saint Médard en Jalles, France;1. Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, P. R. China;2. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China
Abstract:This paper presents the Molecular Dynamic (MD) models and the simulation results for the shear deformation process of an interface representative cell to develop an understanding of the roles of multi-walled carbon nanotube (MWNT) in enhancing fiber–matrix interfacial properties such as shear modulus and strength. Based on the MD results and the two simple formulae of rule of mixture, the shear modulus and strength of the carbon nanotube (CNT) grafted interface can be predicted. It is shown that there exists a good agreement between the predicted fiber–matrix interfacial shear strength with and without grafted CNTs and these measured from single-fiber micro bond test and single-fiber fragmentation test. The MD simulation also shows the MWNTs’ shear stress cross-section distribution is similar to that of a circular beam in shear with a non-zero shear stress on the neutral plane.
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