Buckling and Post-Buckling Behavior of Unitized, Stiffened Tri-Axially Braided Composite Textile Plates

摘要

This investigation examines the buckling and post-buckling response of unitized, doubly stiffened textile fiber reinforced composite plates using the finite element method, and in conjunction with the commercial code Abaqus. Investigations into the global buckling mode shapes, and corresponding loads, and significant behavior during loading in the postbuckled regime are also of significant importance. A two dimensional, tri-axially braided (2DTBC) textile is used to manufacture the panels, and a new approach to creating the stiffener geometry is presented. How the new stiffener formation alters the buckling, post-buckling, and failure response is examined. Axial compressive loading is considered, and computational results are provided and compared against a set of limited experimental data.