Experimental Study on Mechanical Properties of PA66 Blended with MWNTs

2015 ◽  
Vol 766-767 ◽  
pp. 383-388
Author(s):  
T. Thomas Koilraj ◽  
K. Kalaichelvan

A composite material is a macroscopic consolidation of two or more materials, having a detectable interface between them. A nanocomposite is the one which consists of two or more nanosized materials which are dispersed in a matrix in order to perk up the properties of the primary material. Polymer composites are prepared by dispersing strengthening fibres in the polymer matrix. A polymer nanocomposite consists of a polymer matrix with nanosized filler. CNTs are one of the most encouraging fillers because of their extraordinary properties and large aspect ratio. A microscopic amount of CNT can have an inquisitively large impact on the properties of a composite. CNTs have been well documented as nanostructural materials that can be used to alter mechanical properties of polymer-based composite materials because of their superior properties. In this research the properties, both elastic modulus and strength of Nylon-66 is improved by the selective addition of CNT. The main objectives include the study of the effect of CNTs content on the mechanical properties of Nylon 66. The composite is to be prepared at various compositions of CNT and material will be analysed by testing the mechanical properties using various test facilities. The finite element modelling of the test specimens were made and a Representative Volume Element (RVE) approach of finite element modelling is used to model the specimen. Mathematical calculations were performed to find out the modelling and RVE. The results are then compared and concluded.

2017 ◽  
Vol 740 ◽  
pp. 31-40 ◽  
Author(s):  
Ahmad Fuad Ab Ghani ◽  
Jamaluddin Mahmud

The study presents the multi methods of determining mechanical properties and mechanical characterization under tensile loading of hybrid composite in the form of experimental technique involving measurement of strain using strain gauge and digital image correlation (DIC) technique utilizing open source platform Ncorr to compute the strain on surface of hybrid composite. The method of micro mechanical modelling using Finite Element Modelling (FEM) in the mode of representation volume element (RVE) method and macro scale FEM using commercial software Ansys have been performed to compute the modulus of elasticity in direction of uniaxial tensile loading. The four methods then compared which yields very consistent results with each other. It is observed that all four methods are reliable in determining mechanical properties of unidirectional single composite as well as hybrid composite. The experimental involved the use of ASTM D3039 standard tensile test for hybrid composite and strain are measured using strain gauges and DIC.


2016 ◽  
Vol 879 ◽  
pp. 2561-2566
Author(s):  
Margarita Isaenkova ◽  
Yuriy Perlovich ◽  
Elizaveta Efimova ◽  
Dmitry Zhuk ◽  
Olga Krymskaya

In this paper investigation results of behavior of promising superelastic alloys of Ti-Nb-Zr system in blood-vessel are presented. The possibility of their use in manufacturing of medical stents is examined. Based on analytical review of present scientific papers, four different alloys of Ti-Nb-Zr system are taken in consideration. A finite element modelling of stent behavior during delivery and opening stages is considered. These processes are done for two typical stent geometries and four alloys possessing different mechanical properties. Finite modelling results are analyzed to show the distribution of internal stresses, mechanical aspects of stent installation and effectiveness of various configurations to widen the narrowed vessel. Modeling has allowed to formulate recommendations for optimal mechanical characteristics of the superelastic alloy used for the manufacture of medical stents.


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