Cryogenic assistance during CFRP drilling
Communication avec acte
The CFRP cutting mechanisms are highly linked to fibers orientations. Firstly, this paper deals with a mechanical characterization of CFRP under cryogenic temperatures. An instrumented compressive test with fibers oriented at 45° regarding the crushing direction has been conducted ranging from -196°C to 20°C to follow the evolution of the failure stress of the epoxide resin. Secondly, a semi-orthogonal radial turning experiment on unidirectional CFRP (T800M21 UD) disc with and without cryogenic assistance has been performed. As the fibers are oriented perpendicular to the spinning axis, on one turn, the tool cuts all the fibers with angles varying from 0° to 360°. During these specific tests the cutting forces have been monitored to characterize the cutting forces evolution versus fiber orientation. The experiment showed that cryogenic machining increases cutting forces but decreases surface roughness compare to dry machining.
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Article dans une revue avec comité de lecturePOUTORD, Antoine; ROSSI, Frédéric; POULACHON, Gérard; M'SAOUBI, Rachid; ABRIVARD, Guillaume (Inderscience, 2016)In aerospace applications, drilling is one of the most common operations. However, this machining stays complex and expensive, especially for difficult-to-cut materials such as titanium alloys. Because drilling is a blind ...
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Process Mechanics and Surface Integrity Induced by Dry and Cryogenic Machining of AZ31B-O Magnesium Alloy Communication avec acteOUTEIRO, José; ROSSI, Frédéric; FROMENTIN, Guillaume; POULACHON, Gérard; GERMAIN, Guénaël; BATISTA, Antonio (Elsevier, 2013)The corrosion resistance of magnesium alloys depends mainly on its surface integrity. Previous experimental studies have shown that machining can induces small (nano-scale) grain size, compressive residual stresses and ...
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