A NONCLASSICAL STRESS-ANALYSIS FOR A LAMINATED COMPOSITE SECTION

In this study the nonclassical method of stress analysis, developed by Ardic, Santare & Chou [Int. J. Sol. Struct., 26 (1990) 643-53; Int. J. Engng Sci., 27 (1989) 1397-405], is applied to a laminated composite body containing continuous fiber-reinforced layers. For this problem the nonclassical method is performed in two steps. First, each lamina is considered to be homogeneous and anisotropic. The effects of adjacent laminae on the average strains in each lamina are determined. These strains are used as input far-field strains for the laminae, and by using the nonclassical method for three-dimensional, continuous fiber-reinforced materials in Ardic et al. [Int. J. Sol. Struct., 26 (1990) 643-53] the effects of heterogeneity on the stresses in the fibers and the matrix of each lamina are found. By summing the stresses calculated from the input far-field strains and the heterogeneity stresses the stress fields in the fibers and matrix are determined separately. Some sample results are plotted for comparison with classical methods.