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A hybrid finite element approach is presented for the analysis of cracked panels with riveted doublers in airframe structures. The method uses the super element developed by Tong to model the cracked panel with rivet holes, springs to model the rivets, and regular finite elements to model the doubler. The super element accurately models the crack and rivet holes of the skin while the regular finite element method provides the versatility to take into account the variety of doubler designs. Numerical results are presented to demonstrate the efficiency and accuracy of this approach, and to compare different doubler designs.
fracture mechanics, fatigue (materials), finite element method, aircraft structures, aircraft repairs
Professor and head, Hong Kong University of Science and TechnologyVolpe National Transportation Systems Center, Hong KongCambridge, MA
Professor, Transportation Systems CenterTufts University, CambridgeMedford, MAMA
Graduate student, Tufts University, Medford, MA