Global/local Approach Using Hybrid Elements For Composites

Abstract

A global/local approach is proposed using partial hybrid elements for composites. The domain of the structure to be analyzed is divided into three areas: local region, global region, and transition region The 3-D sub-laminated elements are used to predict detail stress distribution in the local region The degenerated hybrid plate/shell element is used in the global region, and the transition elements are used to connect a degenerated element with the 3-D sublaminated elements. Because all of the elements in the global/local model are derived from the combined energy variational principle, the global/local finite element model satisfies the continuity of interlaminar stresses at the interlayer surface and traction condition on the top and bottom surface of laminated composites. Two examples are presented to show the efficiency and accuracy of the global/local approach for stress analysis of laminated composites.