Buckling and Postbuckling of Unitized, Stiffened Composite Panels

摘要

This investigation continues the examination into buckling and postbuckling responses of unitized, stiffened textile fiber reinforced composite plates using the finite element method for comparison with experimental results. Experiments in axial compression of two types of two dimensional, tri-axially braided (2DTBC) textiles are discussed, and a method to recover partially faulty datasets is presented. Comparison of experiments to a developed computational model within the commercial code Abaqus is also discussed. The observed failure mode was successfully changed with the unitized stiffener concept from stiffener debonding to another mode, thereby increasing loading capability well into the postbuckling regime.