Repair and maintenance of FRP structures


Maintenance, routine inspection and repair of fibre-reinforced components are briefly reviewed. The damaged areas may be identified by surface tapping or by suitable nondestructive testing methods. Repairs are classified as easy ( light damage, which does not affect the structural integrity ), for which cosmetic repairs are acceptable, and complex ( extensive damage significantly affecting structural performance ). Outer coatings are first removed and the surface cleaned. Repairs by bonding are best for thin structures (0.4 mm maximum, excluding core ), whilst thick laminates ( 12.5 mm maximum, excluding core ) are best repaired by bolting. The damaged areas may be patched, or the hole sides may be tapered or stepped and a scarf or step repair applied. Portable repair systems are available to apply controlled heat and vacuum to the repair. Alternatively, sheets of fibre-reinforced epoxy may be bonded to the surface ( pre-cured doubler). 4 refs.

Primary author(s): Halliwell S;Suttie E

Source: BRE Good Repair Guide

             GRG 34, 2003, 6pp       




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