Fatigue Crack Growth of Bondline Cracks in Structural Bonded Joints

Abstract
Adhesive bondline crack growth data are presented from fatigue tests of structural bonded single-lap joints with initial bondline flaws. Crack growth was successfully monitored both ultrasonically and by a compliance technique. A fracture mechanics analysis estimate of bondline crack growth rates in these tests is described, and the estimated rates are compared to the actual monitored crack growth rates.

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