Open AccessA modified direct method for the calculation of elastic moduli of composite materials
Author(s) -
J.A. Wang,
J. Lubliner,
Paulo J.M. Monteiro
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/201789
Subject(s) - moduli , composite number , elasticity (physics) , elastic modulus , direct methods , homogeneous , work (physics) , materials science , mathematics , mathematical optimization , computer science , composite material , mechanical engineering , engineering , physics , quantum mechanics , combinatorics , nuclear magnetic resonance
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