Numerical Modeling of Nano Bundle and Nano Rope-Reinforced Polymer Mechanical Properties: Crimson Publishers

Numerical Modeling of Nano Bundle and Nano Rope-Reinforced Polymer Mechanical Properties by Seyed Hossein Mamanpush*, Zohre Matin Ghahfarokhi and Hossein Golestanian in Crimson Publishers: Journal of Mechanical Engineering
Carbon nanotubes (CNTs) demonstrate unusually high stiffness, strength and resilience, and are ideal reinforcing materials for polymer-based nanocomposites. Van der Waals interactions between the nanotubes often result in formation of nanotube bundles and/or ropes. Determination of mechanical properties of the nano bundle and nano rope-based nanocomposites is difficult due to the complicated geometries of the reinforcement structures. However, to better utilize nanocomposites, it is crucial to determine mechanical properties of nanocomposites in their real form as much as possible. In this paper, the elasticity theory for anisotropic body and continuum modeling are used to determine effective mechanical properties of bundle and nanorope-based nanocomposites. Numerical models are developed using a Representative Volume Element (RVE) consisting of nanoropes and nanobundles made up of different numbers of nanotubes to investigate the effect of nanorope geometry on nanocomposite mechanical properties. Models of several RVEs are developed with nanoropes consisting of five, seven, nine, and thirteen CNTs. CNT volume fraction is kept constant in all models for a valid comparison. Also, the effect of matrix modulus on the strengthening efficiency of CNTs is investigated. The results indicate that nanocomposite longitudinal modulus decreases with increasing the number of CNTs in the nanorope.

https://crimsonpublishers.com/eme/fulltext/EME.000518.php

For More open access journals in Crimson Publishers
please click on link: https://crimsonpublishers.com

For More Articles on Journal of Mechanical Engineering
Please click on: https://crimsonpublishers.com/eme/index.php

Comments

Post a Comment

Popular posts from this blog

Compression Behavior of Pa-12 Pipes Under Large Displacements: Crimson Publishers

Image
Compression Behavior of Pa-12 Pipes Under Large Displacements by De Almeida LS, de Oliveira TA, Maurício MHP and d’Almeida JRM* in Crimson Publishers: Materials science Polyamide (PA) pipes are being increasingly employed in fluid distribution networks . Most of these pipes is used in underground networks, where overloads can cause large deflections. Excessive displacement can lead to product failure and can cause surface cracks and leakage of the fluid being transported. This condition can be maximized if the pipe is aged due to effects of the environment or of the fluid itself. In this work, the effect of aging PA pipe segments by their exposure to hot water is presented and discussed. The deformation characteristics of the material before and after aging are evaluated. The results indicate plasticization of the pipes due to exposure to hot water, and, thus, the loads required to cause a specific degree of compression, characterized by reduction of the pipe’s diameter, a...
Read more

Crimson Publishers-Analysis of Hybrid Power Train System Based on Degree of Freedom

Image
Analysis of Hybrid Power Train System Based on Degree of Freedom by Kun Zhao in  Evolutions in Mechanical Engineering The hybrid power train is one of the most important technologies that have been developed to satisfy the challenging fuel economy and emission standards. A suitable configuration of hybrid power train should not only meet the requirements of vehicle kinematics and dynamics, but also meet the requirement of fuel economy and emission. For this purpose, a hybrid power train system should contain multiple power sources so that the speed and torque of the power sources can be properly distributed to achieve high system efficiency. To achieve optimal distribution of speed and torque, the system should have more speed DOF and torque DOF. Therefore, the hybrid power train system can be analyzed based on the viewpoint of degrees of freedom. https://crimsonpublishers.com/eme/fulltext/EME.000504.php For more open access journals in Crimson Publishers please ...
Read more

Design and Manufacture of an Electrolyser for its Application in Obtaining Hydrogen as Fuel_Crimson Publishers

Image
  Design and Manufacture of an Electrolyser for its Application in Obtaining Hydrogen as Fuel by Jorge Ivan Cifuentes_ Alkaline Electrolyser Abstract  This paper shows the most important aspects of the operation of an alkaline electrolyser which was sized to adapt to the fuel demand conditions of an internal combustion engine under idle speed and considering a stoichiometric mixture. In the experimental part, the hydrogen flow rate generated by the electrolyzer was determined under nominal conditions, using a flowmeter based on the principle of gas collection in water. With the built electrolyser, a capacity factor of 2.62ml W-1 min-1 and a flow rate of 3.29lpm were obtained which was sufficient for the satisfactory operation of the engine. With the development of this project was proved that an ordinary internal combustion engine can operate using only hydrogen as fuel, without the need for any modification in its factory design. https://crimsonpublishers.com/eme/fullte...
Read more