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Damage-sensing composite structures

A composite material, sensing circuit technology, applied in the field of fiber materials, can solve problems such as catastrophic failure, internal damage of composite materials, etc.

Inactive Publication Date: 2012-10-24
APPL NANOSTRUCTURED SOLUTIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Composite materials used in structural applications are susceptible to internal damage which can lead to catastrophic failure

Method used

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  • Damage-sensing composite structures
  • Damage-sensing composite structures
  • Damage-sensing composite structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0128] This example illustrates how CNTs can be infused into glass fiber materials in a continuous process and used in impact damage sensing applications. In this case, short CNT arrays are desirable for enhanced damage detection resolution.

[0129] Figure 14 A system 1500 for producing CNT-infused fibers according to an illustrative embodiment of the invention is described. System 1500 includes fiberglass material output and tensioning system 102, CNT-infusion system 112, and fiber winder 124, interrelated as shown.

[0130] The output and tensioning system 102 includes an output bobbin 104 and a tensioner 106 . The output bobbin holds the fiber roll and delivers the fiberglass material 101 to the process at a line speed of 9 ft / min; fiber tension is maintained at 1-5 lbs by tensioner 106. Delivery and tensioning stations 102 are conventional in the fiber industry; their design and use will be familiar to those skilled in the art.

[0131] The tensioned fiber 105 is del...

Embodiment II

[0141] This example shows how CNTs can be infused into glass fiber materials in a continuous process and used for impact damage sensing applications. In this case, short CNT arrays are desirable for enhanced damage detection resolution.

[0142] Figure 14 A system 1500 for producing CNT-infused fibers according to an illustrative embodiment of the invention is described. System 1500 includes fiberglass material output and tensioning system 102, CNT-infusion system 112, and fiber winder 124, interrelated as shown.

[0143] The output and tensioning system 102 includes an output bobbin 104 and a tensioner 106 . The output bobbin holds the fiber roll and delivers the fiberglass material 101 to the process at a line speed of 12 ft / min; fiber tension is maintained at 1-5 lbs by tensioner 106. Delivery and tensioning stations 102 are commonly used in the fiber industry; those skilled in the art will be familiar with their design and use.

[0144] The tensioned fiber 105 is deli...

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Abstract

A composite includes a matrix material and a unidirectional array of carbon nanotube- infused fibers disposed in a portion of the matrix material. An article includes this composite and a network of electrodes disposed about the periphery of the composite. The electrodes send and receive an electrical charge. Such an article is included in a system, along with sensing circuitry and a source for supplying current to the network of electrodes. Such a system is used in a method that includes subjecting the article to a load that causes a condition in the composite including strain, fatigue, damage, or cracks, and monitoring the location of the condition.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Application Serial No. 61 / 253,021, filed October 19, 2009, the entire contents of which are hereby incorporated by reference. [0003] Statement Regarding Federally Funded Research or Development [0004] Not applicable. technical field [0005] The present invention relates to fibrous materials, and more particularly to fibrous materials in composite materials. Background technique [0006] Composite materials used in structural applications are susceptible to internal damage which can lead to catastrophic failure. Identifying the initiation and propagation of cracks in composite structures (as a result of high stress, impact or fatigue) is difficult without the use of specialized equipment. In a variety of applications where identification of composite integrity is important to system operation, it would be beneficial to develop methods to monitor i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/00B82B1/00
CPCB82Y30/00G01N27/20Y10T428/249928Y10T428/249924Y10T428/24994B29K2105/124B29C70/14B29C70/882B29C70/081C01B32/00B32B5/02G01B7/16G01R27/08
Inventor H·C·马里基J·A·休斯T·K·沙
Owner APPL NANOSTRUCTURED SOLUTIONS LLC
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