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Chomarat will give the JEC Europe a preview of the latest technical advances and the first parts obtained with C-PLY Bi-Angle, which makes use of innovative fibre orientations within the composite.
According to Chomarat, by eliminating the fibres placed perpendicular to the main loading axis and/or using extremely thin plies (75G/M2), it is possible to develop completely new multiaxial materials. They say C-PLY Bi-Angle is a carbon reinforcement that makes it possible to manufacture even lighter and stronger composites more rapidly and cost effectively.
C-PLY Bi-Angle is a non-woven carbon reinforcement (non crimp fabric, or NCF) that was launched in 2011 by Chomarat in partnership with a research group of manufacturers and academics working under Professor Tsai from Stanford University.
The range is expanding and developing; and Chomarat explain that it is now possible to produce C-PLY Bi-Angle from glass or glass/carbon hybrid, as well as to alternate thin and thick plies at angles as low as 20°. “The 20° angles give laminates optimum performance: producing them is simpler, up to three times faster, and there are fewer ply placement errors,” said Philippe Sanial, R&D Manager at Chomarat.
To meet demand from aerospace builders and equipment manufacturers, Chomarat say the C-PLY Bi-Angle range is expanding to include constructions that will allow optimising all composite aerospace parts. They explain the thin plies (50-75 g/m²) in C-PLY Bi-Angle are a key element in the performance of the composite used for the fuselage.
Chomarat say the final use of this development concerns composite parts that require greater strength in certain directions (anisotropy). A two-layer multiaxial with one layer at 0° and the other at +20°, like C-PLY Bi-Angle, establishes a bend twist coupling that makes the material work in what they describe as a revolutionary manner: the interaction of the bending and torsional stresses actually works to keep the part from bending or twisting. In the aviation sector, this material is being tested in parts like wings, wing components and engine blades. The research team is currently working on a project to make a demonstrator for a lightweight sports aircraft incorporating all these innovations.
Chomarat will be at booth Q25 at JEC Europe next week.
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