Car face wall architecture for a car such as a train car made from sandwich composite material

Abstract

A car belonging to a rolling vehicle, characterized in that it includes sidewalls in the form of a single piece made from composite material including a sandwich structure provided with a first skin on the outside of the car, a second skin on the inside of the car and a closed-cell foam or honeycomb core between the skins, the walls being provided with window openings formed by interruptions in the drapes of longitudinal fibres, transverse fibres and intersecting diagonal fibres, the openings having a polygonal shape that reduces the surface area of interrupted diagonal fibres in the corners of the openings.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the National Stage of International Application No. PCT / EP2015 / 073863, having an International Filing Date of 15 Oct. 2015, which designates the United States of America, and which International Application was published under PCT Article 21(2) as WO Publication No. 2016 / 059147 A1, and which claims priority from and the benefit of French Application No. 1460011, filed 17 Oct. 2014, the disclosures of which are incorporated herein by reference in their entireties.BACKGROUND[0002]1. Field[0003]The presently disclosed embodiment concerns a car face wall architecture such as a train car made from sandwich composite material equipped with openings.[0004]The disclosed embodiment relates to a design solution for a structural panel made of composite material equipped with openings, i.e. bays, hatches, windows which are designed to lighten globally the weight of the structure, and are applicable in particular for the walls of a...

AI Technical Summary

Benefits of technology

The patent text discusses various technologies for improving the strength of aircraft structures using composite materials. These include the use of different fibers and resins, as well as different methods of implementation like draping or infiltration. The windows in the body can also be adapted to enhance longitudinal rigidity. The skins of the composite materials can also be modified to withstand more forces locally. The openings in the body are preferably hexagonal or octagonal with large horizontal sides connected by convex lateral borders. These technologies help to make airplanes stronger and more durable.

Problems solved by technology

It is in fact in these conditions that the mechanical functioning of the structure is optimized, and thus consequently its weight and cost.

However, as represented in FIG. 3, at the panels of the faces, the presence of the angles of conventional bays with a rectangular form leads to cutting of the fibers between the top and the bottom of the face panel, which may make it necessary to increase the distance between two windows, or the local thickness of materials between two windows, which complicates the production of the panel and makes it more costly.

This form of hatch with a small size is obviously unsuitable for a passenger train.

On the other hand, it is not known to optimize the windows of cars made of composite material, and the same applies to the manner of production.

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