Effects of interface cohesion on mechanical properties of interpenetrating phase nanocomposites

Xiao-Yu Sun; Guang-Kui Xu; Jun-Hui Zhang; Yuan-Jie Xu

Effects of interface cohesion on mechanical properties of interpenetrating phase nanocomposites

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Author(s): Xiao-Yu Sun ¹ ; Guang-Kui Xu ² ; Jun-Hui Zhang ³ ; Yuan-Jie Xu ¹
- Affiliations: 1: Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan 430072, People's Republic of China;
  2: International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China;
  3: Department of Civil Engineering, North China University of Technology, Beijing 100144, People's Republic of China
Source: Volume 9, Issue 10, October 2014, p. 697 – 701
DOI: 10.1049/mnl.2014.0304 , Online ISSN 1750-0443

Received 30/05/2014, Accepted 18/08/2014, Revised 31/07/2014, Published 23/09/2014

Molecular dynamics simulations and micromechanics model analysis are performed to investigate the mechanical behaviours and interfacial effects of interpenetrating phase composites in the nanoscale. It is observed that the overall Young's modulus and ultimate strength of the nanocomposites vary nonlinearly with the cohesive energy of the interface. The cohesive properties affect the stiffness of the interface zone, and in turn, influence the effective Young's modulus of composites. The competition between interfacial failure and weak phase damage results in an optimal cohesive parameter of the interface, at which the composite possesses the maximal ultimate strength. The obtained results provide useful guidelines for the design and optimisation of advanced nanocomposites with superior mechanical properties.

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