A modified direct method for the calculation of elastic moduli of composite materials
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.
- Oak Ridge National Lab., TN (United States). Computational Physics and Engineering Div.
- Univ. of California, Berkeley, CA (United States). Dept. of Civil Engineering
- Publication Date:
- OSTI Identifier:
- Report Number(s):
ON: DE96005440; TRN: AHC29606%%103
- DOE Contract Number:
- 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: 
- Research Org:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Org:
- Nuclear Regulatory Commission, Washington, DC (United States)
- Country of Publication:
- United States
- 36 MATERIALS SCIENCE; COMPOSITE MATERIALS; ELASTICITY; CALCULATION METHODS; COMPARATIVE EVALUATIONS; MATHEMATICAL MODELS; YOUNG MODULUS; THEORETICAL DATA
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