Modelling of Pillowing Due to Corrosion in Fuselage Lap Joints

  1. Get@NRC: Modelling of Pillowing Due to Corrosion in Fuselage Lap Joints (Opens in a new window)
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Journal titleCanadian Aeronautics and Space Journal
Pages125130; # of pages: 6
SubjectD sight aircraft inspection systems; Fuselage lap joints; Out of plane displacements; Pillowing; Thickness loss; Aircraft; Composition; Finite element method; Fuselages; Inspection; Joints (structural components); Mathematical models; Nondestructive examination; Optical systems; Surfaces; Corrosion
AbstractA mathematical model was developed to correlate the amplitude of the pillowing deformation of lap joints to the degree of corrosion inside the joint. The model is expected to be capable of predicting the extent of the corrosion within a joint in terms of thickness loss at the internal surfaces from the amplitude of the pillowing of the outer skin. The resulting out-of-plane displacements obtained from the model will be used to generate simulated D Sight images. D Sight is a simple optical non-destructive surface inspection technique that is capable of detecting changes in out-of-plane displacements greater than 10 micrometers. The model indicated that the pillowing ratio (central deflection to thickness loss) caused by the corrosion products was independent of the modulus of rigidity and thickness of the skin. Finite element techniques in conjunction with the mathematical model were used to determine the amplitude of the pillowing in a simple lap joint.
Publication date
AffiliationNRC Institute for Aerospace Research; National Research Council Canada
Access conditionunclassified/unlimited
Peer reviewedNo
NRC numberSMPL-1994-0066
NPARC number8931123
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Record identifier65065f1b-6f6d-4f83-84b3-968b5cd45cc8
Record created2009-04-23
Record modified2016-05-09
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