Method for conditioning composite structures

Details Method for conditioning composite structures Method for conditioning composite structures

1988-03-22

1990-01-30

Thurlow, Jeffery

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 92, 174 2, 244 1A, 361212, 361218, 428189, 428922, B32B 3108, B32B 3128, H05F 300

Patent

active

048971430

ABSTRACT:
A method for conditioning a composite structure to have an increased sparking current threshold. The method calls for the treatment of the joint in a composite structure by injected currents for predetermined periods of time at a sequence of voltages which are initially less than the present sparking voltage threshold of the structure. The voltage levels can be increased during the treatment to be greater than the sparking voltage threshold of the original structure. If the composite structure contains fasteners, the sparking voltage threshold can be conveniently increased by injecting the current from a timed voltage source through a variety of pairs of the fasteners.

REFERENCES:
patent: 2510727 (1950-06-01), Sussenbach
patent: 3989984 (1976-11-01), Amason et al.
patent: 4673450 (1987-06-01), Burke
patent: 4727451 (1988-02-01), Covey

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