AE Monitoring of CFRP Structure during Autoclave Processing


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Large structural composite sandwich panels (approx. 2x4 m2) were found to have cracks in the honeycomb core. The core was made out of a number of Nomex honeycomb blocks having different densities. These were first machined and adhesively bonded into the final shape. The CFRP skins were then added and the sandwich panel was cured in an autoclave applying elevated temperature and pressure. Acoustic emission monitoring was done during 17 hours of processing in the autoclave using a six channel AE system. AE events from cracking of the honeycomb core were registered and could be identified in time and space. The results from AE monitoring were very useful for modifying the process parameters and overcome the cracking of the core.



Advanced Materials Research (Volumes 13-14)

Edited by:

R. Pullin, K.M. Holford, S.L. Evans and J.M. Dulieu-Barton




M. Knuuttila "AE Monitoring of CFRP Structure during Autoclave Processing", Advanced Materials Research, Vols. 13-14, pp. 333-336, 2006

Online since:

February 2006





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