摘要:
The invention refers to a panel structure (1) for an aircraft comprising at least one composite layer (3, 4), and at least one net-shaped layer (2) attached to the at least one composite layer (3, 4), wherein the net-shaped layer (2) comprises a material suitable to improve the impact resistance of the panel structure (1). The net-shaped layer (2) can be used to attach two composite layers (3, 4). Alternatively, the net-shaped layer (2) can be attached to a surface of one composite layer (3, 4). In this last case, the net-shaped layer (2) may be joined to a laminate sheet material (5), and filled with a foam material (6). The invention provides an impact reinforced panel structure (1) capable of withstanding any impact, such as a blade release, or a bird strike, without substantially modifying the manufacturing process.
摘要:
Auxetic bi-stable structure that comprises: - an auxetic curved shell (2) movable between a first and a second stable position, and - a rigid element (1) wherein at least part of the surface the auxetic curved shell (2) is joined to the rigid element (1) such that the curved shell (2) is movable with respect to said rigid element (1) between said first and second stable positions.
摘要:
The invention provides a deformable structure, such as a panel (11) or a shock absorber (20), for absorbing energy from a mechanical and/or acoustic impact comprising an inner core (13) and one or more external layers covering the inner core (13). The inner core (13) comprises a set of first segments (25) having a positive Poison's ratio and second segments (35) having a negative Poisson's ratio. The first and second segments (25, 35) are arranged alternately and joined between them so that the deformation received by one first segment (25) can be transmitted to an adjacent second segment (35) and vice versa.
摘要:
The invention provides an internal shield (31) inside the rear fuselage (11) of an aircraft having a propulsion system formed by two engines (13) mounted on each side of it. The internal shield (31) is located in a suitable place inside the rear fuselage (11) for covering the possible trajectories of fragments detached from one of said engines (13) in a failure event that would impact critical elements of the opposite engine. The internal shield (31) comprises an ensemble of fluid containers belonging to aircraft sub-systems, such us particularly the potable water and waste water sub-systems, with enough fluid for providing the energy absorption capability required for stopping said fragments. The invention also refers to an aircraft having said internal shield (31).
摘要:
The invention provides an internal shield (31) inside the rear fuselage (11) of an aircraft having a propulsion system formed by two engines (13) mounted on each side of it. The internal shield (31) is located in a suitable place inside the rear fuselage (11) for covering the possible trajectories of fragments detached from one of said engines (13) in a failure event that would impact critical elements of the opposite engine. The internal shield (31) comprises an ensemble of fluid containers belonging to aircraft sub-systems, such us particularly the potable water and waste water sub-systems, with enough fluid for providing the energy absorption capability required for stopping said fragments. The invention also refers to an aircraft having said internal shield (31).
摘要:
The invention refers to an aerodynamic surface (1) for an aircraft comprising a torsion box having a front spar (5), and a composite leading edge section that comprises an outer surface (2) shaped with an aerodynamic leading edge profile, an inner surface (3) internally arranged with respect to the outer surface (2), and a blanket (4) spanwise arranged between the outermost point of the inner surface (3) and the front spar (5), wherein the blanket is made of fibre material having a specific energy absorption ranging from 47 to 72 J•g- 1 and a longitudinal wave speed ranging from 6 to 15 km•s -1 , wherein the major part of the blanket (4) is of dry fibre material, and wherein the blanket (4) is joined to at least two opposing areas of the inner surface (3) for absorbing a bird strike, to prevent the damage of the front spar (5).