Abstract
In this study, the description of a micromechanical method to estimate the effective elastic constants of woven composites with polymer matrix is presented. To this end, woven composites are discretized to a series of unidirectional laminas. For validating the microscopic mechanical method, the calculated effective moduli of the unidirectional lamina are compared with other literatures. In addition, the fiber off-axis angle effects on longitudinal modulus, transversal modulus and Poisson’s ratio are further discussed by employing the coordinate transformation formula. It can be concluded that minimum longitudinal modulus will be acquired when the off-axis angle of 60° is considered. Combining with the classic laminate theory and 3D high-fidelity generalized method of cells, the elastic constants of E-glass/epoxy woven composites are predicted. By comparisons, it demonstrated that the proposed method is capable of mechanical modeling for plain woven composites.
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