Carbon nanotubes (CNTs) have been regarded as an ideal reinforcements of high-performance composites with enormous applications. In this paper, the effects of pinhole defect are investigated for carbon nanotube based nanocomposites using a 3D representative volume element (RVE) with long CNTs. The CNT is modeled as a continuum hollow cylindrical shape elastic material with pinholes in it. These defects are considered on the single wall (CNTs). The mechanical properties such as Young’s modulus of elasticity are evaluated for various pinhole locations and number of defects. The influence of the pinhole defects on the nanocomposite is studied under an axial load condition. Numerical equations are used to extract the effective material properties for the different geometries of RVEs with nondefective CNTs. The field-emission microscopy (FEM) results obtained for nondefective CNTs are consistent with the analytical results for cylindrical RVEs, which validate the proposed model. It is observed that the presence of pinhole defects significantly reduces the effective reinforcement when compared with nondefective nanotubes, and this reinforcement decreases with the increase in the number of pinhole defects. It is also found from the simulation results that the geometry of RVE does not have much significance on the stiffness of nanocomposites.
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e-mail: unnatiajoshi@gmail.com
e-mail: sshmefme@iitr.ernet.in
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February 2011
Research Papers
Effect of Pinhole Defects on the Elasticity of Carbon Nanotube Based Nanocomposites
Unnati A. Joshi,
Unnati A. Joshi
Department of Mechanical and Industrial Engineering, Vibration and Noise Control Laboratory,
e-mail: unnatiajoshi@gmail.com
Indian Institute of Technology Roorkee
, Roorkee 247667, India
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Satish C. Sharma,
Satish C. Sharma
Department of Mechanical and Industrial Engineering, Vibration and Noise Control Laboratory,
e-mail: sshmefme@iitr.ernet.in
Indian Institute of Technology Roorkee
, Roorkee 247667, India
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S. P. Harsha
S. P. Harsha
Department of Mechanical and Industrial Engineering, Vibration and Noise Control Laboratory,
e-mail: surajfme@iitr.ernet.in
Indian Institute of Technology Roorkee
, Roorkee 247667, India
Search for other works by this author on:
Unnati A. Joshi
Department of Mechanical and Industrial Engineering, Vibration and Noise Control Laboratory,
Indian Institute of Technology Roorkee
, Roorkee 247667, Indiae-mail: unnatiajoshi@gmail.com
Satish C. Sharma
Department of Mechanical and Industrial Engineering, Vibration and Noise Control Laboratory,
Indian Institute of Technology Roorkee
, Roorkee 247667, Indiae-mail: sshmefme@iitr.ernet.in
S. P. Harsha
Department of Mechanical and Industrial Engineering, Vibration and Noise Control Laboratory,
Indian Institute of Technology Roorkee
, Roorkee 247667, Indiae-mail: surajfme@iitr.ernet.in
J. Nanotechnol. Eng. Med. Feb 2011, 2(1): 011003 (7 pages)
Published Online: January 4, 2011
Article history
Received:
September 29, 2010
Revised:
December 12, 2010
Online:
January 4, 2011
Published:
January 4, 2011
Citation
Joshi, U. A., Sharma, S. C., and Harsha, S. P. (January 4, 2011). "Effect of Pinhole Defects on the Elasticity of Carbon Nanotube Based Nanocomposites." ASME. J. Nanotechnol. Eng. Med. February 2011; 2(1): 011003. https://doi.org/10.1115/1.4003028
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