The PolyU Aviation Research Centre (ASRC) has developed an automated NDI and scarfing system for composite components which works in two steps. First, a scanning system identifies the defects to obtain a model of the defect that includes the direction of each ply. The component is then scarfed automatically to prepare the area where the repair patch will be applied.
When a composite component is damaged, the exact area and depth of damage must be identified. After this, the damage must be removed very carefully and sufficient plies of the composite material must be retained. The damaged area must be removed with a taper. This is very time-consuming and requires a lot of craftmanship.
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