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Designing Particulate Composites: The Effect of Variability of Filler Properties and Filler Spatial Distribution

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Materials with Internal Structure

Part of the book series: Springer Tracts in Mechanical Engineering ((STME))

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Abstract

A new perspective on structural design of particulate composites is presented in this chapter. The central concept is that by controlling multiple parameters describing the stochastic microstructure, such as allowing the filler properties to vary from filler to filler, or constructing spatially correlated filler distributions, significantly expands the design space which, in turn, is likely to lead to the development of more performant composites. We investigate the effect of two such parameters on the elastic-plastic and damping behavior of the composite. First, we consider microstructures containing fillers of same properties but which are spatially distributed in a correlated way. It is observed that composites with spatially correlated filler distributions are stiffer, strain harden more and lead to larger damping ratios relative to microstructures with random, uncorrelated filler distributions of same volume fraction. In the second part of the study we consider composites in which filler properties vary from filler to filler. It is observed that the composite modulus and its strain hardening rate decrease as the variance of the probability distribution function of filler elastic constants increases, while the mean of the distribution is kept constant. The damping ratio of the composite is not sensitive to the higher moments of the distribution function of damping coefficients within inclusions.

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Acknowledgments

This work has been supported in part by the Romanian National Authority for Scientific Research, CNCS–UEFISCDI, project number PN-II-ID-PCE-2011-3-0120, under contract 293/2011.

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Authors and Affiliations

  1. Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA

    Catalin R. Picu

  2. Department of Strength of Materials, University POLITEHNICA of Bucharest, Bucharest, Romania

    Stefan Sorohan & Dan M. Constantinescu

  3. General Electric Global Research, Niskayuna, NY, 12309, USA

    Monica A. Soare

Authors
  1. Catalin R. Picu
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  2. Stefan Sorohan
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  3. Monica A. Soare
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  4. Dan M. Constantinescu
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Corresponding authors

Correspondence to Catalin R. Picu or Monica A. Soare .

Editor information

Editors and Affiliations

  1. Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Rome, Italy

    Patrizia Trovalusci

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Picu, C.R., Sorohan, S., Soare, M.A., Constantinescu, D.M. (2016). Designing Particulate Composites: The Effect of Variability of Filler Properties and Filler Spatial Distribution. In: Trovalusci, P. (eds) Materials with Internal Structure. Springer Tracts in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-21494-8_7

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  • DOI: https://doi.org/10.1007/978-3-319-21494-8_7

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-21493-1

  • Online ISBN: 978-3-319-21494-8

  • eBook Packages: EngineeringEngineering (R0)

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