Definition and Non-Destructive Detection of Critical Adhesive Bond-Line Flaws.
Final rept. 27 Jun 75-31 Jul 78,
MCDONNELL AIRCRAFT CO ST LOUIS MO
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Fatigue tests were conducted on adhesive bonded aluminum specimens with intentionally induced adhesive bondline flaws. Specimen design details, materials, type of surface preparation, the test loadings were selected to be representative of those on the bonded wide-body fuselage test article designed and built in the PABST program. Tests conducted in this report show that bondline flaws loaded primarily in shear did not grow whereas those loaded by peel or tension forces did exhibit flaw growth. Flaw growth rate was higher at the slow rate of two cycles per hour than for a fast-cycle rate of 30 Hz. Bondline flaws grew incrementally with load cycles and could be tracked by state-of-the-art NDE. Author
- Adhesives, Seals and Binders
- Metallurgy and Metallography