Recent progress in laser system technology enables innovative techniques for the machining of CFRPs. A representative application is the layer-by-layer removal of damaged composite material to provide a cavity for refilling with repair plies. Results show that it is possible to achieve a reliable and automatable removal rate to perform arbitrary repair cavity geometries, obtaining a relevant time reduction with respect to the conventional manual grinding process. The combination of modern UV-laser sources with a scanning technology enables scanning speeds of up to 4.0 m s-1, and suppresses heat affected zones and detachment of fibers from the polymer matrix. The interlaminar shear strength of repaired laminates and reference specimens have been measured and evaluated according to DIN 65148, and the results are reported here.

Laser-based repair for carbon fiber reinforced composites

ROMOLI, Luca;
2012

Abstract

Recent progress in laser system technology enables innovative techniques for the machining of CFRPs. A representative application is the layer-by-layer removal of damaged composite material to provide a cavity for refilling with repair plies. Results show that it is possible to achieve a reliable and automatable removal rate to perform arbitrary repair cavity geometries, obtaining a relevant time reduction with respect to the conventional manual grinding process. The combination of modern UV-laser sources with a scanning technology enables scanning speeds of up to 4.0 m s-1, and suppresses heat affected zones and detachment of fibers from the polymer matrix. The interlaminar shear strength of repaired laminates and reference specimens have been measured and evaluated according to DIN 65148, and the results are reported here.
Fischer, F.; Romoli, Luca; Kling, R.; Kracht, D.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/1143480
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