Accomplishments - Weak (“Kissing”) Bond Detection
Carefully controlled lap-shear coupons were produced with repeatable amounts of contamination.
Extensive work was completed on bonds that have intimate contacts but are weak: so-called kissing bonds. Several new contaminates, were shown to reproducibly reduce bond strength. It was shown that grease reduces both shear and tensile strength with the same sensitivity dependence and that grease contamination can be detected with ultrasonic pulse/echo inspection.