Author(s)

S. Mellings, J. Baynham, R. Adey & T Curtin

Abstract

Crack growth prediction in stiffened panel structures using BEM and FEM S. ~ e l l i n ~ s ' , J. ~a~nharn', R. ~ d e ~ ' & T. curtin2 1 Computations! Mechanics BEASY, UK 2 Computational Mechanics Inc, Billericu, Ahit 01821 Abstract A new formulation is presented which models complex structures consisting of multiple panels and supporting beams. The model uses both boundary elements and finite elements in a way which uses the best characteristics of both methods. New boundary element types are developed to represent the holes in a panel where the fasteners connect structural panels to other panels or supporting structures. These elements substantially simplify the modelling and provide a mechanism where both linear and nonlinear fasteners can be specified. An easy to use "wizard" type interface has been developed to specify the model geometry and properties and examples are presented demonstrating its application to some typical aerospace problem. Introduction In many structures thin panel de

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