Safran Aircraft Engines

Angélique Melody Marine Alexia Mainczyk

Jean-Louis Romero

Jean-Pierre Coulette

Geoffrey Martin

A method for non-destructively testing the heating of a determined zone of a part made of a polymer material, the method comprising the following steps: a) taking at least one colorimetric measurement on said determined zone to be tested and obtaining the value aof the parameter a of the CIELAB colorimetric space; b) taking at least one colorimetric measurement on said reference zone of said part and obtaining the value aof the parameter a of the CIELAB colorimetric space; c) calculating &#x394;a=a&#x2212;a; and d) establishing a risk of heating said determined zone to be tested if &#x394;ais higher than a threshold value A1.

Method for the non-destructive testing of a casing by colorimetry

A method for the non-destructive testing of the heating of a part made from polymer material, the method comprising the following steps: a) carrying out a measurement by infrared spectroscopy on a part to be tested and extracting therefrom at least one of absorbance values and transmittance values according to a spatial frequency; and b) from the measurement of at least one of absorbance and transmittance, determining the period of time during which said region of the part to be tested has been subjected to a given heating temperature and determining said heating temperature, using a reference database comprising at least one of absorbance measurements and transmittance measurements, the measurements established over a plurality of reference samples made from polymer material that have been subjected to a given temperature during a given period of time.

Method for the non-destructive testing of a casing

A method for non-destructively testing the heating of a determined zone of a part made of a polymer material, comprising: a) taking at least one colorimetric measurement on said determined zone to be tested and obtaining the values a, band Lof the parameters a, b and L of the CIELAB colorimetric space; b) taking at least one colorimetric measurement on said reference zone of the part and obtaining the values a, band Lof the parameters a, b and L of the CIELAB colorimetric space; c) calculating the colour difference &#x394;Ebetween the colorimetric measurements obtained in steps a) and b); and d) from the value &#x394;E, determining the time period during which said zone to be tested of the part has been subjected to a determined heating temperature, by using a reference database.

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Moissy-Cramayel, France

Angélique Melody Marine Alexia Mainczyk