Abstract:
A device for absorbing kinetic energy for an aircraft structural element undergoing a dynamic impact. The device includes an outer enclosure made from a braided composite material configured to preserve its integrity after an impact, a foam core, contained in the outer enclosure and to at least partially fill the outer enclosure. The foam core is configured to at least partially absorb the kinetic energy generated by the impact. Reinforcing elements are integrated at least partially into the foam core to dissipate, combined with the form core, the kinetic energy generated by the impact. The reinforcing elements includes discontinuous threads inserted into the foam core by stitching, and each discontinuous thread includes an L- or T-shaped head, folded down outside the outer enclosure.
Abstract:
A device for absorbing kinetic energy for an aircraft structural element undergoing a dynamic impact. The device includes an outer enclosure made from a braided composite material configured to preserve its integrity after an impact, and a foam core contained in the outer enclosure and to at least partially fill the outer enclosure. The foam core configured to at least partially absorb the kinetic energy generated by the impact. Reinforcing elements include at least one dry composite fiber preform integrated into the foam core to dissipate, in combination with the foam core, the kinetic energy generated by the impact. A method for integrating the device for absorbing kinetic energy.
Abstract:
A strip of a semi-finished product (101, 102), suitable for being deposited by lay-up, for the constitution of a laminated composite material, includes, according to a cross-section and over all its length: a first conductive layer (105, 106), made of an electric conductive material; two electric insulating layers (121, 122), made of a dielectric material completely surrounding the conductive layer (105, 106), the cross sectional width of which is greater than the width of the conductive layer; and two bonding layers (111, 112), extending in thickness on either side of the insulating layers (121, 122), on the exterior of the strip (101, 102). A method for the continuous production of such a strip is also described.