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Composite material wall reinforced for limiting crack propagation in one direction

A technology of composite materials and reinforcements, which is applied in the direction of synthetic resin layered products, thin material processing, power devices on aircraft, etc., and can solve problems such as not being used to contact aerodynamic flow

Active Publication Date: 2013-06-19
AIRBUS OPERATIONS (SAS)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the protruding elements, such panels may not be used in applications exposed to aerodynamic flow

Method used

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  • Composite material wall reinforced for limiting crack propagation in one direction
  • Composite material wall reinforced for limiting crack propagation in one direction
  • Composite material wall reinforced for limiting crack propagation in one direction

Examples

Experimental program
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Embodiment approach

[0069] According to a preferred embodiment, the metal reinforcement 20 has a width of approximately 30 mm and a thickness of approximately 0.5 mm, the struts and crosspieces have a width of approximately 2 mm to 4 mm, the grooves are regularly spaced and have a dimension L1 of 30 mm to 35 mm and a dimension L2 close to 25mm.

[0070] Such as Figure 8 and 9 As shown, in case the reflective wall 16 of the sound-absorbing panel 10 is a tubular portion with an axis 30 , the stiffeners 20 should be (preferably regularly) distributed on the circumference in a direction parallel to the axis 30 . Advantageously, on the cylindrical wall of the air inlet, 12 to 35 stiffeners should be regularly distributed on the periphery, forming an angle between them varying substantially from 10° to 30°. Advantageously, 16 to 18 reinforcements should be provided.

[0071] For the walls of the pressurized fuselage, not only should the spread of cracks be limited, but also the sealing of the walls...

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Abstract

The invention relates to a wall made from a composite material comprising at least two layers of fibers (18, 18') embedded in a resin matrix, a crack being able to spread in said wall in a direction of propagation, characterized in that it comprises at least one longilineal metal reinforcement (20), oriented in a direction secant to the direction of propagation, inserted between two layers of fibers (18, 18') of the wall.

Description

technical field [0001] The invention relates to a wall made of reinforced composite material to limit the propagation of cracks in a given direction. Background technique [0002] In order to limit the impact of noise disturbances in aircraft, noise reduction techniques have been developed, notably by arranging panels or coatings on certain walls to absorb some of the sound energy, notably utilizing the principle of Helmholtz resonators. [0003] Panels of this type comprise, from the outside to the inside, a porous sound barrier, at least one honeycomb structure and reflective or impermeable walls. Alternatively, the panel may comprise a plurality of superimposed honeycomb structures with a porous sound-resisting layer disposed therebetween. The cells of the honeycomb structure are dimensioned to ensure optimum sound dampening treatment. [0004] The "layer" refers to one or more layers that may or may not have the same properties. [0005] According to one embodiment, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B3/08B32B3/14B32B15/08
CPCB32B3/08B32B27/08B32B2262/00B32B2307/5825B32B2605/18B64C1/40B64C2001/0072B64D2033/0206Y02T50/40Y10T428/249921
Inventor 阿兰·波特雅克·拉兰纳斯特凡娜·迪达
Owner AIRBUS OPERATIONS (SAS)