A hole in an aircraft panel (e.g. wing cover access hole) is reinforced against fatigue by bonding a frustoconical reinforcement member 20 to the panel 10 using an adhesive 70. These are compressed together using an assembly comprising a compression member 40, a resilient rubber washer 50, a support plate 30, and a clamping bolt 62. The compression member 40 has a frustoconical wall portion of complementary shape to the reinforcement member. The support plate 30 can have a heater for curing the adhesive used to bond the annular reinforcement member to the panel, and a protrusion (38, fig 2c) to help centre the reinforcement member 20 during assembly. The panel 10 and reinforcement member 20 can be metal (e.g. aluminium), composite, wood or plastic.
Reinforced holes
2022-08-31
Patent
Electronic Resource
English
Optimum designs for reinforced circular holes
TIBKAT | 1956
|Neutrally Reinforced Holes in Symmetrically Laminated Plates
Online Contents | 1993
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