SMART COMPOSITES AND METHOD OF USE THEREOF

• US 20090020212A1
• Filed: 05/19/2008
• Published: 01/22/2009
• Est. Priority Date: 05/18/2007
• Status: Abandoned Application

• Current Assignee: GKN Aerospace Services Structures Corp. (Melrose Industries Plc)
• Original Assignee: GKN Aerospace Services Structures Corp. (Melrose Industries Plc)
• Inventors: Cacace, Anthony
• Application Number:
  US12/123,155
• Publication Number:
  US 20090020212A1
• Time in Patent Office: Days
• US Class Current: 156/64
• CPC Class Codes: G01M 5/0033 by determining damage, crack or wear
• CPC Class Codes: G01M 5/0083 by measuring variation of impedance, e.g. resistance, capacitance, induction
• CPC Class Codes: G01M 5/0091 by using electromagnetic excitation or detection
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor

Abstract

Devices, systems, and methods for monitoring the condition of components, such as components of airframes, and in particular devices, methods, and systems for detecting faults and warning of faults in components using transmission mechanisms, such as optically or electrically conductive material incorporated in the construction of the components, added to a laminate material.

Claims

1. A device for detecting faults and weaknesses in a component, the device comprising:

a non-conductive material shaped to form the component; and

a monitoring module including;

a conductive material in contact with the non-conductive material;

an input for inputting one of an electrical and an optical signal into the conductive material; and

a detector that detects at least one transmission parameter of the conductive material based on a received signal after the signal has been conducted through the conductive material and determines whether a weakness exists in the component based on the at least one transmission parameter.

2. The device according to claim 1, wherein the detector determines that a weakness exists based on at least one of a change in the at least one transmission parameter and a deviation of the at least one transmission parameter from a predetermined standard.

3. The device according to claim 2, wherein the non-conductive material includes a composite laminate, and wherein the conductive material is sandwiched between two layers of non-conductive material.

4. The device according to claim 3, further comprising:

a plurality of sections of uncured resin embedded in at least one layer of the composite laminate, wherein the plurality of sections are configured to be triggerably rupturable upon the detection of a weakness in the component.

5. The device according to claim 3, wherein the component is an airframe component.

6. The device according to claim 5, wherein the conductive material comprises a conductive grid embedded in the composite laminate.

7. The device according to claim 5, wherein the conductive material comprises a fiber optic woven into a laminate material.

8. The device according to claim 5, wherein the conductive material comprises an electrically conductive material woven into a laminate material.

9. The device according to claim 5, wherein the conductive material comprises a conductive material sprayed onto a layer of fabric.

10. The device according to claim 1, wherein the monitoring module further comprises:

a printed circuit element.

11. A method of monitoring a composite laminate component, the method comprising:

providing a laminate composite component having a conductive layer sandwiched between at least two non-conductive layers;

inputting one of an electrical and an optical signal to the conductive layer;

receiving the signal after transmission through the conductive layer; and

analyzing the received signal to determine whether the component comprises a weakness.

17. The method of claim 11, further comprising:

if a weakness is detected, applying a sealant material to at least a weakened section of the component.

18. The method of claim 17, wherein the sealant material is located in the laminate composite component and applying the sealant material includes:

triggering a rupture of a container holding the sealant material.

12. The method of claim 12, wherein determining whether the component comprises a weakness includes:

determining whether there has been a change in one of the inductance and the resistance of the conductive material.

13. The method of claim 12, wherein determining whether the component comprises a weakness includes:

determining whether one of the inductance and the resistance of the conductive material falls outside a predetermined range.

14. The method of claim 12, wherein inputting the signal comprises:

continuously inputting the signal to the conductive material.

15. The method of claim 12, wherein inputting the signal comprises:

semi-continuously inputting the signal to the conductive material.

16. The method of claim 12, wherein the conductive material includes a plurality of sections and inputting the signal comprises:

inputting the signal to each of the plurality of sections of the conductive material sequentially.

19. A method of manufacturing a composite laminate airplane component having a monitoring feature, the method comprising:

providing a non-conductive first laminate layer;

providing a conductive material adjacent the first non-conductive laminate layer;

providing a second non-conductive laminate layer adjacent the conductive material, and located on the side opposite the first non-conductive laminate layer;

attaching an input to the conductive material, wherein the input is configured to input one of an electrical and an optical signal to the conductive material;

attaching a detector to the conductive material, wherein the detector is configured to detect at least one transmission parameter of the conductive material based on a receipt of the input signal; and

wherein the first and second non-conductive layers are shaped to form the airplane component;

20. The method of claim 19, further comprising:

triggering the rupture of an uncured resin material comprised in the airplane component when a weakness is detected based on the at least one transmission parameter.