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  • Analysis of manufacturing problems related with metal-metal aerospace structural joints through acoustic emission and differential scanning calorimetry


Problems experienced during cure cycle of epoxy adhesives in film for concern especially false bonding due to extraneous substances (eg protective Teflon layer) or to an incorrect or too long storage of the adhesive. In addition to these problems, a sudden blackout or a not planar application of the pressure can hinder the performance of a complete polymerization cycle. Thus, after having collected some information on the most frequent events that reduce joints quality in aerospace industry, all those cases were approximately reproduced in the laboratory with a hot-plates press and materials really used in practice (204 T3 aluminium alloy treated with chromic acid anodization). The results of acoustic emission testing are presented in this paper.

Additional information

Authors: CALABRÒ A ET AL, Italian Centre for Aerospace Research (CIRA), Capua (IT);BILLI F ET AL, JRC Ispra (IT);BUONOCORE V ET AL, Universitè di Napoli-Federico II (IT)
Bibliographic Reference: Paper presented : 22nd European Conference on Acoustic Emission Testing, Aberdeen (GB), May 29-31, 1996
Availability: Available from (1) as Paper EN 39940 ORA
Record Number: 199610966 / Last updated on: 1996-09-30
Original language: en
Available languages: en
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