Abstract
This article deals with the elastoplastic behavior of the steel fiber-reinforced aluminum metal-matrix laminated composite plates with different circular hole diameters. The plates are assumed to be clamped and subjected to different transversely distributed loads. The loading is gradually increased from the yield point of the plate by 0.001 MPa at each load step up to 15 and 18 kN total load on the plates. The laminated plates are composed of four orthotropic layers oriented at different angles in a symmetric manner. The plates are meshed into 64 elements and 288 nodes. The residual stress and the expansion of the plastic zone are obtained for small deformations by using the finite element method and including the first-order shear deformation theory. The Lagrange elements with nine nodes are used for finding the solution. The results show that the percentage of the plastic zone expansion increases while the diameter of the circular hole decreases for [0°/90°]s, [30°/-30°]s, [45°/-45°]s, and [60°/60°]s fiber directions.
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