On the tensile behavior of hetero-junction carbon nanotubes |
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| Affiliation: | 1. Chelyabinsk State University, Bratiev Kashirinih 129, 454001 Chelyabinsk, Russia;2. Helmholtz-Zentrum Berlin für Materialien und Energie, Institute for Nanometer Optics and Technology, Albert-Einstein-Strasse 15, 12489 Berlin, Germany;1. College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi''an 710021, China;2. Department of Engineering Mechanics, Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China;3. Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai Polytechnic University, Shanghai 201209, China;4. Mechanical Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh 33516, Egypt;5. School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, China;6. School of materials Science and Chemical Engineering, Xi''an Technological University, Xi''an 710049, China |
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| Abstract: | Several straight hetero-junctions carbon nanotubes (CNTs) are constructed and their tensile behavior are investigated. It is pointed that the Young's modulus of hetero-junctions is lower than the values of their fundamental homogeneous CNTs due to the existence of pentagon–heptagon pair defects. In addition, it is revealed that the Young's modulus of homogeneous zigzag CNTs increases by increasing the chiral number of these nano-structures. Finally, it is concluded that as the connecting length of the hetero-junctions increases the Young's modulus of these particular CNTs decreases. Therefore, the tensile strength of hetero-junctions depends on the presence of pentagon–heptagon pair defects. |
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| Keywords: | A. Nano-structures B. Mechanical properties C. Finite element analysis (FEA) |
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