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Computational modeling and relevance of numerical convergence for the investigation of thermal expansion behavior for aluminium hybrid composites

S. A. Mohan Krishna

Department of Mechanical Engineering, Vidyavardhaka College of Engineering, Mysuru-570002, Karnataka, India

E-mail Address: mohankrishnasa@vvce.ac.in

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T. N. Shridhar

Department of Mechanical Engineering, The National Institute of Engineering, Mysuru-570 008, Karnataka, India

E-mail Address: tns.nie@gmail.com

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, and

L. Krishnamurthy

Department of Mechanical Engineering, The National Institute of Engineering, Mysuru-570 008, Karnataka, India

E-mail Address: kitty_nie@yahoo.com

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https://doi.org/10.1142/S204768411650007XCited by:0 (Source: Crossref)

Abstract

The thermal characterization and analysis of composite materials has been increasingly important in a wide range of applications. The coefficient of thermal expansion (CTE) is one of the most important properties of metal matrix composites (MMCs). Since nearly all MMCs are used in various temperature ranges, measurement of CTE as a function of temperature is necessary in order to know the behavior of the material. In this research paper, the evaluation of CTE or thermal expansivity has been accomplished for Al 6061, silicon carbide and graphite hybrid MMCs from room temperature to $30 0^{\circ}$ C. Aluminium-based composites reinforced with silicon carbide and graphite particles have been prepared by stir casting technique. The thermal expansivity behavior of hybrid composites with different percentage compositions of reinforcements has been investigated. The results have indicated that the thermal expansivity of different compositions of hybrid MMCs decrease by the addition of graphite with silicon carbide and Al 6061. Empirical models have been validated for the evaluation of thermal expansivity of composites. Numerical convergence test has been accomplished to investigate the thermal expansion behavior of composites.

Keywords:

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