Estimation and Experimental Validation of Mean-Field Homogenised Effective Properties of Composite
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RESEARCH PAPER
Estimation and Experimental Validation of Mean-Field Homogenised Effective Properties of Composite A. Sharma 1 & V. Rastogi 1 & A.K. Agrawal 1 Received: 27 December 2019 / Accepted: 26 October 2020 # The Society for Experimental Mechanics, Inc 2020
Abstract For composite materials, the system response changes abruptly with a change in the properties of the material. Therefore, attaining significant knowledge about the effect of the material composition on the material properties is crucial. The researchers are looking for new computational methods which can predict these alterations so that the effort in experimental testing can be reduced. In this direction, this paper presents a robust and novel methodology of validating the estimation of the composite’s effective through a multi-scale approach by a set of standardized experimentation. These effective properties are estimated through the mean-field homogenization technique whose parameters are driven from the image analysis of Scanning Electron Microscopy (SEM) images. The predicted results are validated with the results obtained by the experimentation as per ASTM E1876 standard. The estimated error between the predicted properties and the experimental values increased with the increase of alumina particle fraction in the matrix. The mean-field homogenization lags behind the experiments for the parameters defined by the image analysis method than the experimental results. The upper bounds of the mean-field homogenization can be used for the composites with higher reinforcement volume fraction. Keywords Multi-scale analysis . Mean-field homogenization . Image analysis method . ASTM E1876 . Impact hammer test
Introduction With the advent of composite materials, industries have started focusing on the use of lighter weight materials with the same mechanical properties. Metal matrix composites have the edge over the parent metals for rotor applications, as it has a higher specific modulus, tensile strength and other mechanical properties. Aluminium /alumina MMCs have shown prominent growth in the composite material market because of their compatibility to the rotor systems. [1–3]. Many manufacturers such as Duralcan, G.K.N., Toyota, GM and Nissan have used MMC materials to develop various components with both static and dynamic applications [4]. Metal matrix composites can be manufactured by various methods from liquid and semi solid-state of matrix mixed with solid reinforcement particles. There are various methods such as
* A. Sharma [email protected] 1
Department of Mechanical, Production, Industrial and Automobile Engineering, Delhi Technological University, Delhi 110042, India
powder metallurgy, diffusion bonding, infiltration, stir casting and spray forming to manufacture MMC as per requirements. Stir casting is one of the most inexpensive methods which has been used for the fabrication of metal matrix composites. For complicated and extensive size design of metal matrix composites, stir casting is very convenient and useful [5].
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