Latécoère

ARTIST: AircRaft cost and environmenTal efficIent door STructures

Passenger door structures are usually composed of beam and frame. This kind of structure is quite easy to manufacture in metal considering assembly of sheet metal and machined part or in composite through assembly of simple parts. This kind of structure is also quite difficult to optimize due to a wide stress field. A 3D lattice structure will present discrete load path easy to optimize. But this kind of structure is also quite difficult to put in place with classical technology. This student team worked to propose technology that would make it possible to manufacture a 3D lattice door that resulted in weight saving without cost impact. The surface of the door the students worked to produce was sized for emergency case and was provided by Latecoere. The thickness of door structure was constrained by the surrounding structure and was also provided by Latecoere. The student team did not work on interface as part of the scope but did work on a proposed hypothesis, and the pressure load case was considered. The sizing the student team worked toward took into account static strength with intact structure and damaged structure, as well as account fatigue. The density of the lattice was also part of the optimization. The student team worked to express the design performance by the weight achieved in regard to the target and also took into account the cost objective. The outcomes this student team worked to achieve include: -Candidate technologies and the selection report. - A design proposal. - A stress validation. - Coupon test evidence. - RC estimation - Weight evaluation -Risk assessment at the end of the project