GLOBAL-LOCAL ANALYSIS OF BONDED SKIN-TO-STIFFENER JOINTS IN POST-BUCKLED PANELS

摘要

Recent advances in aeronautics and material science allow for a significant increase in load capacity; consequently, structural parts are more stressed than in the past. In most cases, stresses and strains cannot be determined accurately enough using conventional closed form engineering formulae. Therefore, even if much more time-consuming, finite element analysis is used. Because of a high ratio between panel length and adhesive thickness, models need a large number of elements. Thus, computing time can be very long. The aim of this paper is to present a global-local approach to reduce this time. First, a global shell elements model is developed. Second, a local solid elements model is generated from the displacement obtained in the global model. Finally, global-local FEA enables greater precision.