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Title: A modified direct method for the calculation of elastic moduli of composite materials

Abstract

The modified direct method is a scheme for the estimation of elastic moduli of composite materials and is based on micromechanical theory and classical elasticity. Using the statistical homogeneous assumption and the two-phase composite approach, one takes the average field of the composite. Due to the complexity of composite materials, the modeling parameters for the exact analytical theory are not always available and then the effective bounds are usually too wide for practical application. For engineering purposes a more practical and general model is desired. The modified direct method was developed to approach the above requirements. In this work the modified direct method is compared with different available experiment data and methods, for example, Kuster-Toksoez, Christensen-Lo. The comparison results show that the modified direct method provides a very good estimation of the elastic moduli in different kinds of problems, such as the soft and hard inclusion cases, porous materials, at various concentrations and/or various porosities.

Authors:
 [1]; ;  [2]
  1. Oak Ridge National Lab., TN (United States). Computational Physics and Engineering Div.
  2. Univ. of California, Berkeley, CA (United States). Dept. of Civil Engineering
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States)
Sponsoring Org.:
Nuclear Regulatory Commission, Washington, DC (United States)
OSTI Identifier:
201789
Report Number(s):
CONF-960161-1
ON: DE96005440; TRN: AHC29606%%103
DOE Contract Number:
AC05-84OR21400
Resource Type:
Technical Report
Resource Relation:
Conference: 1. international conference on composites in infrastructure, Tucson, AZ (United States), 15-17 Jan 1996; Other Information: PBD: [1996]
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; ELASTICITY; CALCULATION METHODS; COMPARATIVE EVALUATIONS; MATHEMATICAL MODELS; YOUNG MODULUS; THEORETICAL DATA

Citation Formats

Wang, J.A., Lubliner, J., and Monteiro, P.J.M. A modified direct method for the calculation of elastic moduli of composite materials. United States: N. p., 1996. Web. doi:10.2172/201789.
Wang, J.A., Lubliner, J., & Monteiro, P.J.M. A modified direct method for the calculation of elastic moduli of composite materials. United States. doi:10.2172/201789.
Wang, J.A., Lubliner, J., and Monteiro, P.J.M. Thu . "A modified direct method for the calculation of elastic moduli of composite materials". United States. doi:10.2172/201789. https://www.osti.gov/servlets/purl/201789.
@article{osti_201789,
title = {A modified direct method for the calculation of elastic moduli of composite materials},
author = {Wang, J.A. and Lubliner, J. and Monteiro, P.J.M.},
abstractNote = {The modified direct method is a scheme for the estimation of elastic moduli of composite materials and is based on micromechanical theory and classical elasticity. Using the statistical homogeneous assumption and the two-phase composite approach, one takes the average field of the composite. Due to the complexity of composite materials, the modeling parameters for the exact analytical theory are not always available and then the effective bounds are usually too wide for practical application. For engineering purposes a more practical and general model is desired. The modified direct method was developed to approach the above requirements. In this work the modified direct method is compared with different available experiment data and methods, for example, Kuster-Toksoez, Christensen-Lo. The comparison results show that the modified direct method provides a very good estimation of the elastic moduli in different kinds of problems, such as the soft and hard inclusion cases, porous materials, at various concentrations and/or various porosities.},
doi = {10.2172/201789},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 1996},
month = {Thu Feb 01 00:00:00 EST 1996}
}

Technical Report:

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