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Molecular dynamics study of dynamic buckling properties of nanowires with defects

Zhan, Haifei & Gu, YuanTong (2011) Molecular dynamics study of dynamic buckling properties of nanowires with defects. In Kaneko, Shigehiko (Ed.) Proceedings of the 14th Asia Pacific Vibration Conference 2011, The Hong Kong Polytechnic University, The Hong Kong Polytechnic University, HongKong, pp. 1-7.

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Abstract

Based on the embedded atom method (EAM) and molecular dynamics (MD) method, the deformation properties of Cu nanowires with different single defects under dynamic compression have been studied. The mechanical behaviours of the perfect nanowire are first studied, and the critical stress decreases with the increase of the nanowire’s length, which is well agreed with the modified Euler theory. We then consider the effects to the buckling phenomenon resulted from different defects. It is found that obvious decrease of the critical stress is resulted from different defects, and the largest decrease is found in nanowire with the surface vertical defect. Surface defects are found exerting larger influence than internal defects. The buckling duration is found shortened due to different defects except the nanowire with surface horizon defect, which is also found possessing the largest deflection. Different deflections are also observed for different defected nanowires. It is find that due to surface defects, only deflection in one direction is happened, but for internal defects, more complex deflection circumstances are observed.

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ID Code: 42584
Item Type: Conference Paper
Keywords: Nanowires, Compression, Defect, Buckling, Deformation Mechanism
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Materials Engineering not elsewhere classified (091299)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 [Zhan, Haifei & Gu, YuanTong] APVC 2011.
Deposited On: 13 Jul 2011 10:01
Last Modified: 23 Sep 2011 14:51

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