Airbus Helicopters

Eurocopter

Aircelle Limited

Safran Nacelles

Emmanuel Piel

Patrick Boschet

Arnaud Delehouze

Andre Baillard

Odile Lefeu

Frédéric Joubert

Nicolas Preud'Homme

André Baillard

The present disclosure relates to a method of characterizing the thermal ageing of a part made of composite material, in particular a composite material having an organic matrix. The method includes taking from the part a sample of composite material, subjecting the sample to modulated temperature differential calorimetry, determining, from the curve representing the total heat flow component associated with irreversible phenomena, the temperature at which a local extremum appears, this local extremum being characteristic of the thermal ageing, and determining the thermal ageing of the composite material by comparing the temperature at which the local extremum appears with a reference chart.

Method of characterizing the thermal ageing of composite materials, in particular composite materials having an organic matrix

A method for assessing damage to a composite material covered with a polyurethane-type paint is provided. Two separate criteria are measured on a spectrogram obtained by infrared spectrometry, thereby characterizing thermal ageing of the paint, each separate criteria being a measurement on a curve of a spectrum of the spectrogram of a height of a particular peak, thereby giving two independent assessments of the thermal ageing. Then, the two separate criteria are combined together in order to obtain a result of a level of the damage.

Method for assessing the damage to a paint-covered composite material, measuring two separate criteria on the spectrogram

A stripping composition, and a method of making the stripping composition. The stripping composition including 100 parts by weight of a base ingredient consisting in epoxy polydimethylsiloxane, 0.5 to 10 parts by weight of a polymerization agent for polymerizing the base ingredient and constituted by a diaryliodonium salt, not more than 30 parts by weight of an anti-adhesion modulator constituted by a silicone polymer; and not more than 40 parts by weight of an anti-stick agent making the composition less tacky prior to polymerization and constituted by at least one vinyl ether compound.

Stripping composition for a mold for making a composite material part, and method of preparing

The invention relates to a mold for making a composite material part, the mold being coated in a stripping composition. The stripping composition comprises:

Mould for a composite material part coated with a stripping product

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Le Havre, France

Emmanuel Piel