Elastic Behavior of Carbon Nanotubes Reinforced Composites: Micromechanical Modeling

Document Type: Research Paper

Authors

1 Department of Mechanical Engineering, Faculty of Engineering, Hashemite University, Zarqa 13133, Jordan.

2 Department of Mechanical Engineering, Jordan University of Science and Technology, Irbid, Jordan

3 Department of Mechanical Engineering, Faculty of Engineering Technology, Al-Balqa’ Applied University, Amman, Jordan.

Abstract

A micromechanical model is applied to examine the tensile properties of composite materials filled with multi-wall CNT oriented in in-plane and out-of-plane direction and a quantitative micromechanical model for the mechanical behavior of CNT-composites has been developed. Digimat-MF is used to generate a realistic three-dimensional microstructure for the current carbon nanotube/ epoxy composite. The Digimat model simulates a system of aligned carbon nanotubes arranged in-plane and another one having out of plane arrangement of reinforcements. A second model shows a representative volume element for the current nano-composite, in which the carbon nanotubes were simulated as a randomly (fully) dispersed, where all particles have been separated from each other. The predicted mechanical properties are compared with experimental tensile properties of composite materials reinforced with multi-wall CNTs arranged in in-plane and out-of-plane direction. A good agreement between the micromechanical modeling and the experimental part is observed. Results show that the elastic energy stored in -the-through thickness direction reinforced composites is about two times higher than that in the pure polymer.

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