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Volume 2, Number 2, May 2020 , pages 141-152 DOI: https://doi.org/10.12989/cme.2020.2.2.141 |
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Creep compliance and micromechanics of multi-walled carbon nanotubes based hybrid composites |
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S. Srikant Patnaik, Ashirbad Swain and Tarapada Roy
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| Abstract | ||
| This article investigates the properties of nanocomposites (NCs) and carbon fiber reinforced hybrid materials from experimental and numerical studies under different thermal conditions. The multi-walled carbon nanotubes (MWCNTs) are reinforced in the epoxy for the preparation of NCs with the help of ultrasonic probe sonicator. Hand layup technique is used for the preparation of NCs and NCs based carbon fiber reinforced polymer (CFRP) with pre-cured epoxy. To study the dispersion and agglomerations of the reinforcement in matrix phase, the images are captured at high magnification for the MWCNTs, NCs and NCs based CFRP based hybrid material system with the help of transmission electron microscopy (TEM) and environmental scanning electron microscopy (ESEM). At different temperatures, the short term creep and frequency scan tests are performed on the dynamic mechanical analyzer-8000 (DMA-8000) for MWCNTs based NCs, and NCs based CFRP material system respectively. The creep compliance is obtained from DMA-8000. The frequency and temperature dependent material properties of NCs based material system have obtained from the numerical analysis. The Saravanos-Chamis micromechanics (SCM) and strength of material (SOM) methods are implemented to determine the material properties of NCs based CFRP material system. Storage modulus and loss factor are determined in order to study the effect of different MWCNT percentage on the NCs based CFRP material systems. Experimental validation has been done for the suggested NCs based CFRP material system. Responses suggest the damping property is improved by the inclusion of MWCNTs in the matrix phase for CFRP material system. It is further observed that the higher MWCNTs percentage in the matrix phase leads to higher stiffness and damping. | ||
| Key Words | ||
| MWCNTs; nanocomposite; creep compliance; micromechanics; damping | ||
| Address | ||
| S. Srikant Patnaik, Ashirbad Swain and Tarapada Roy: Department of Mechanical Engineering, National Institute of Technology Rourkela, Rourkela-769008, India | ||
