Bond strength measurement of composite panel products

Details Bond strength measurement of composite panel products Bond strength measurement of composite panel products

1987-05-26

1988-06-14

Chapman, John

Measuring and testing

Vibration

By mechanical waves

73588, 73600, G01N 2900

Patent

active

047503688

ABSTRACT:
The invention is a method for the on-line nondestructive determination of the internal bond strength of composite panel products. The method involves impinging an ultrasound pulse against the panel by a first transducer and receiving a transmitted pulse at a second transducer. The received signal strength, temperature and panel thickness are entered into an algorithm from which the internal bond may be calculated. Preferably the receiving transducer is located on the opposite side of the panel and displaced somewhat from the first transducer. The inclusion of temperature and panel thickness as independent variables greatly improves the accuracy over that available from uncorrected ultrasound testing.

REFERENCES:
patent: 3384767 (1968-05-01), Arnold et al.
patent: 3423991 (1969-01-01), Collins
patent: 3780570 (1973-12-01), Collins

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