PLANKING PANEL FOR A STRUCTURAL COMPONENT, FLOW BODY COMPRISING SUCH A PLANKING PANEL AND DEVICE FOR MONITORING MATERIAL DAMAGE ON SUCH A PLANKING PANEL

• US 20140000381A1
• Filed: 01/17/2013
• Published: 01/02/2014
• Est. Priority Date: 07/20/2010
• Status: Abandoned Application

• Current Assignee: Airbus Operations GmbH (Airbus SE)
• Original Assignee: Airbus Operations GmbH (Airbus SE)
• Inventors: Zuardy, Ichwan, Zahlen, Pierre, Herrmann, Axel Siegfried
• Application Number:
  US13/743,767
• Publication Number:
  US 20140000381A1
• Time in Patent Office: Days
• US Class Current: 73/802
• CPC Class Codes: B29D 99/0021 provided with plain or filled structures, e.g. cores, placed between two or more plates or sheets, e.g. in a matrix
• CPC Class Codes: B32B 2266/0214 Materials belonging to B32B27/00
• CPC Class Codes: B32B 2266/04 Inorganic
• CPC Class Codes: B32B 2266/045 Metal
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/5825 Tear resistant
• CPC Class Codes: B32B 2605/18 Aircraft blades, propellers B32B2603/00
• CPC Class Codes: B32B 2607/00 Walls, panels
• CPC Class Codes: B32B 3/02 characterised by features of form at particular places, e.g. in edge regions non-uniform thickness B32B3/263
• CPC Class Codes: B32B 3/06 for securing layers together; for attaching the product to another member, e.g. to a support , or to another product, e.g. groove/tongue, interlocking
• CPC Class Codes: B32B 3/08 characterised by added members at particular parts layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18
• CPC Class Codes: B32B 3/28 characterised by a layer comprising a deformed thin sheet , i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled B32B29/08 takes precedence
• CPC Class Codes: B32B 3/30 characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: B32B 7/04 Interconnection of layers
• CPC Class Codes: B64C 1/12 Construction or attachment of skin panels
• CPC Class Codes: B64C 3/20 Integral or sandwich constructions
• CPC Class Codes: B64C 3/26 Construction, shape, or attachment of separate skins, e.g. panels
• CPC Class Codes: B64D 2045/0085 Devices for aircraft health monitoring, e.g. monitoring flutter or vibration
• CPC Class Codes: B64D 45/00 : Aircraft indicators or protectors not otherwise provided for camouflage F41H3/00
• CPC Class Codes: G01N 19/08 : Detecting presence of flaws or irregularities
• CPC Class Codes: Y10T 428/239 : Complete cover or casing
• CPC Class Codes: Y10T 428/24 : Structurally defined web or sheet [e.g., overall dimension, etc.]
• CPC Class Codes: Y10T 428/24322 : Composite web or sheet
• CPC Class Codes: Y10T 428/249923 : Including interlaminar mechanical fastener

Abstract

The invention pertains to a planking panel (B) for a structural component (1) that is realized in the form of a sandwich component in its inner region (BI) that extends in a planar fashion and features a first skin section (11), a second skin section (12) and a core section (13) that is situated between these two skin sections, wherein the core section (13) connects the first and the second skin sections (11, 12) to one another in a planar fashion, with the invention being characterized in that a plurality of monitoring lines (14) is provided that extend over a planar section of the core section (13) to be monitored in order to detect damage in the core section (13) and respectively feature a first connection point (15) on a first end (14a) and a second connection point (16) on a second end (16a) in order to apply a monitoring signal (UK), wherein the monitoring lines (14) have a tear strength that lies in the range between 50% and 100% of the tear strength of the core section (13).

Claims

1. A planking panel for a structural component that is realized in the form of a sandwich component in its inner region that extends in a planar fashion and features a first skin section, a second skin section and a core section that is situated between these two skin sections and connects the first and the second skin sections to one another in a planar fashion,

wherein the planking panel features at least one monitoring line that is respectively coupled to a first connection point and to a second connection point in order to apply a monitoring signal and extends over a region of the core section in order to detect damage in a monitoring volume of the core section, wherein the monitoring line has a tear strength that in terms of its amount lies in the range between 50% and 100% of the amount of the fracture strength of the planar region of the core section.

2. The planking panel according to claim 1, wherein the core section has a tensile strength in the range between 1.5 MPa and 2.5 MPa and/or a shear strength in the range between 0.8 MPa and 1.6 MPa.

3. The planking panel according to claim 1, wherein at least one monitoring line extends in the planking panel in a meander-shaped fashion such that bridging segments extending along the thickness direction of the planking panel and between the oppositely arranged skin sections and reversing segments that respectively connect these bridging segments and are respectively situated in one of the oppositely arranged skin sections are formed.

4. The planking panel according to claim 3, wherein the connection points of the at least one monitoring line are situated in different skin sections.

5. The planking panel according to claim 3, wherein the connection points of the at least one monitoring line are situated in one and the same skin section of the skin sections.

6. The planking panel according to claim 1, wherein the planking panel features a plurality of monitoring lines that extend along the thickness direction of the planking panel, wherein each monitoring line features two connection points, and wherein a first connection point is respectively situated on the first skin section and a second connection point is respectively situated on the second skin section.

7. The planking panel according to claim 1, wherein the planking panel features a plurality of monitoring lines that extend along the longitudinal direction of the planking panel and each monitoring line features two connection points, both of which are situated on the first skin section or both of which are situated on the second skin section.

8. The planking panel according to claim 1, wherein the monitoring lines consist of electrical conductors, the connection points consist of electrical connection points and the monitoring signal consists of an electric monitoring voltage.

9. The planking panel according to claim 1, wherein the monitoring lines consist of optical waveguides, the connection points consist of optical connection points and the monitoring signal consists of an optical monitoring signal.

10. The planking panel according to claim 1, wherein the core section consists of a homogenous material that preferably is specifically lighter than the two skin sections.

11. The planking panel according to claim 1, wherein the core section consists of a foam core, particularly a polymer foam core, an aluminum foam core, a ceramic core or a massive core.

12. The planking panel according claim 1, characterized in that the core section consists of a composite core that is composed of several sandwich cores.

13. The planking panel according to claim 1, characterized in that the tear strength of the monitoring lines corresponds to a tensile strength in the range between 1.5 MPa and 2.5 MPa and a shear strength between 0.8 MPa and 1.6 MPa.

14. A flow body, particularly for an aircraft, with a planking panel according to claim 1.

15. A device for monitoring material damage on a planking panel in accordance with claim 1, wherein the monitoring device features an activation device for transmitting a signal via the monitoring line and an evaluation device, by means of which it can be determined if the monitoring line is intact based on the signal transmitted via the monitoring line in order to detect damage in the foam section, wherein the activation device is designed in such a way that it transmits the monitoring signal via the monitoring lines permanently or within predefined time intervals.