A study of the microscopic deformation behavior of Nb3Sn composite superconducting tape using the acoustic emission technique

Lee, Min-Rae; Lee, Joon-Hyun; Kwon, Yong-Hwan

doi:10.1016/j.compscitech.2003.10.018

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…Such detected behavior is supported by similar results obtained previously using acousticemission (AE) technology [58,59]. Generally, the mechanical events occurring within a superconductor by conductor motion (permanent or plastic deformation) and epoxy fracture can be detected by an AE sensor, but no AE signal can be detected until experiencing mechanical plastic deformation during detecting superconducting magnet [60,61]. While the dynamic strain measurements are quantitative and continuous from excitation to quench, including both elastic and plastic deformation.…”

Section: Resultssupporting

confidence: 80%

A dynamic strain-based quench-detection method in an LTS sextupole magnet during excitation and quench

Gao

Guan

Xin

2020

Supercond. Sci. Technol.

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The dynamic strain characteristics and responses of a low-temperature superconducting (LTS) magnet during excitation and a quench are investigated in the present work. For the strain measurements, strain gauges in the form of a half-bridge circuit comprising cryogenic strain gauges and their dummy resistances are embedded directly within the superconducting magnet structure. A wireless high-speed data acquisition system with a resolution of 1 ms is also used to obtain the strain history of the LTS magnet during operation. The dynamic strain induced by thermal or mechanical disturbances is detected promptly and compared with the transport current and temperature signals recorded during a quench. This indicates that the dynamic strain measured in the LTS magnet can capture a quench feature in a timely manner. For a better understanding of the dynamic strain histories in the magnet, the dynamic strain signals are subjected to spectral analysis during the excitation and pre- and post-quench processes. It is shown originally that several spectral peaks on strain measured are always observed at the onset of a quench. Thus, the dynamic strain characteristics and responses provide a evaluation means of superconducting magnet.

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Section: Resultssupporting

confidence: 80%

A dynamic strain-based quench-detection method in an LTS sextupole magnet during excitation and quench

Gao

Guan

Xin

2020

Supercond. Sci. Technol.

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Section: Introductionmentioning

confidence: 99%

Research on Health Monitor for Three-Dimensional Braided Composite Material

Wan

2011

AMM

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This paper describes two methods of Fiber Bragg Grating (FBG) embedded in the three-dimensional (3D) braded composite materials and acoustic emission health monitor for 3D braided composite materials condition. The paper mainly analyses the relations of FBG change and the inner straining under the stretching on materials. It is provided that the way of signal collection and processing. The experimental results proved that FBG sensors have exceptional sense characteristic. The braided angle of composites has a little influence on FBG signal. FBG embedded in the 3D braided composite materials has not more effect mechanical property of materials. According to two health monitoring methods and the particularity of 3D braided composites, the health monitoring method based on FBG much more applies to dynamic monitoring on 3D composites special field. This research provides basis for the study and application of advanced intelligent composites.

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“…Currently in composite materials and structure of existing space craft has been extensively applied, our spacecraft application of composites have made certain progress, but compared with advanced foreign countries, large gap still [3][4] .In the application of composite material is one of the main reasons for the composite manufacturing complex, cost is exorbitant, 2 it is independent research and application of automation equipment evaluation system. To achieve "by new materials to our country new material power shift" goal, domestic related units around the spacecraft key materials, has carried out some research work, such as antioxidant carbon/carbon materials and ceramic tile and nano structure, thermal insulation materials, flexible materials, metal structure, high heat resistant composite structure, thrust tank with composite material preparation and related materials performance evaluation of characterization techniques [5] . Especially the 3D braided composites in China, the application of space shuttle for carrying workpieces provided protection.3D alien overall weaving technology is in the 1980s developed a kind of new textile technology, its purpose is to develop a kind of advanced composite material, which can overcome traditional composite layer, meet to areas such as aerospace, high-tech, etc [6][7] .…”

mentioning

confidence: 99%

Research on Health Monitor for Three-Dimensional Braided Composite Material Products Condition Based on FBG

Wan

2010

AMR

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This paper describes the method of Fiber Bragg Grating(FBG)embedded in the three-dimensional(3D) braded composite materials and provides the method of health monitor for 3D braided composite materials condition. The paper analyses the relations of FBG change and the inner straining under the stretching on materials. It is provided that the way of signal collection and processing. In the process of load-supporting, the internal local strain of 3D braided composites is much more, and local strain has certain interference on embedded near FBG output. The experimental results proved that FBG sensors have exceptional sense characteristic. The braided angle of composites has a little influence on FBG signal. FBG embedded in the 3D braided composite materials has not more effect mechanical property of materials. This research provides basis for the study and application of advanced intelligent composites.

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A study of the microscopic deformation behavior of Nb3Sn composite superconducting tape using the acoustic emission technique

Cited by 7 publications

References 6 publications

A dynamic strain-based quench-detection method in an LTS sextupole magnet during excitation and quench

A dynamic strain-based quench-detection method in an LTS sextupole magnet during excitation and quench

Research on Health Monitor for Three-Dimensional Braided Composite Material

Research on Health Monitor for Three-Dimensional Braided Composite Material Products Condition Based on FBG

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