DE10113216B4 - Method for measuring the creep of a hollow cylindrical component at high temperature and high internal pressure and use of the method - Google Patents
Method for measuring the creep of a hollow cylindrical component at high temperature and high internal pressure and use of the method Download PDFInfo
- Publication number
- DE10113216B4 DE10113216B4 DE10113216A DE10113216A DE10113216B4 DE 10113216 B4 DE10113216 B4 DE 10113216B4 DE 10113216 A DE10113216 A DE 10113216A DE 10113216 A DE10113216 A DE 10113216A DE 10113216 B4 DE10113216 B4 DE 10113216B4
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- Prior art keywords
- hollow cylindrical
- creep
- cylindrical component
- internal pressure
- measured
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/54—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/161—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by interferometric means
- G01B11/162—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by interferometric means by speckle- or shearing interferometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/023—Pressure
- G01N2203/0232—High pressure
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Fluid Pressure (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Verfahren
zur Messung des Kriechens eines hohlzylindrischen Bauteils bei hoher
Temperatur und hohem Innendruck mit den Schritten,
– auf dem
zu überwachenden
hohlzylindrischen Bauteil werden in axialer und in Umfangsrichtung
Markierungen angebracht oder eine ausreichend charakteristische
Oberflächentextur
gesucht,
– diese
Markierungen oder die Oberflächentextur
werden kontinuierlich optisch beobachtet und so die Entfernung zwischen
bestimmten Punkten auf der Oberfläche kontinuierlich gemessen,
– aus der
gleichzeitig gemessenen Wandtemperatur und dem gemessenen Innendruck
wird die dadurch bewirkte Änderung
der Entfernung der beobachteten Punkte berechnet, wobei zur Erhöhung der
Genauigkeit die berechneten Spannungsverteilungsverhältnisse
in bestimmten Richtungen genutzt werden, wobei bei dem hohlzylindrischen
Bauteil die Axialspannung die Hälfte
der Spannung in Umfangsrichtung zufolge des Innendrucks ist,
– aus der
Differenz zwischen den gemessenen und berechneten Entfernungen wird
das Kriechen des hohlzylindrischen Bauteils und auch die Kriechgeschwindigkeit
kontinuierlich ermittelt,
– bei
Umgebungstemperatur in drucklosem Zustand wird jeweils das Kriechen
kalibriert,Method for measuring the creep of a hollow cylindrical component at high temperature and high internal pressure with the steps
On the hollow cylindrical component to be monitored, markings are made in the axial and circumferential direction or a sufficiently characteristic surface texture is sought,
These markings or the surface texture are continuously optically observed, thus continuously measuring the distance between certain points on the surface,
From the simultaneously measured wall temperature and the measured internal pressure, the change in the distance of the observed points caused thereby is calculated using the calculated stress distribution ratios in certain directions to increase the accuracy, wherein in the hollow cylindrical component the axial stress is half the stress in the circumferential direction the internal pressure is,
From the difference between the measured and calculated distances, the creep of the hollow cylindrical component and also the creeping speed are determined continuously,
- at ambient temperature in a pressureless state, the creep is calibrated in each case,
Description
Die Erfindung betrifft ein Verfahren zur Messung des Kriechens eines hohlzylindrischen Bauteils bei hoher Temperatur und hohem Innendruck gemäß Patentanspruch 1 und eine Verwendung des Verfahrens gemäß Patentanspruch 3.The The invention relates to a method for measuring the creep of a hollow cylindrical component at high temperature and high internal pressure according to claim 1 and a use of the method according to claim 3.
Zum Stand der Technik findet man im Lexikon der Physik, Herrmann Franke (Hrsg.), Franckh'schen Verlagsbuchhandlung Stuttgart, Band 2: I-R, 3. Auflage 1969, Seiten 883 und 884, und im Handbuch für experimentelle Spannungsanalyse, Prof. Dr.-Ing. Christof Rohrbach (Hrsg.), VDI-Verlag GmbH 1989, ISBN 3-18-400347-7, Seiten 809–825, Hinweise auf einzelne Verfahrensschritte aber nicht die angeführte Kombination der verschiedenen Messverfahren und deren Kalibrierung.To the The state of the art can be found in the Lexikon der Physik, Herrmann Franke (Ed.), Franckh'schen Verlagsbuchhandlung Stuttgart, Volume 2: I-R, 3rd edition 1969, pages 883 and 884, and in the manual for experimental stress analysis, Prof. Dr.-Ing. Christof Rohrbach (Ed.), VDI-Verlag GmbH 1989, ISBN 3-18-400347-7, pages 809-825, notes on individual process steps but not the combination mentioned the different measuring methods and their calibration.
In
Das Objektrasterverfahren nach tm – Technisches Messen, 67, 2000, Seiten 267–273 und die Verformungsmessung nach tm – Technisches Messen, 62, 1995, Seiten 3–7, wären viel zu ungenau, um zur Kriechdehnungsmessung verwandt zu werden und geben auch keine Hinweise, wie das Kriechen berechnet werden kann.The Objektrasterverfahren after tm - Technical Messen, 67, 2000, pages 267-273 and the deformation measurement according to tm - Technisches Messen, 62, 1995, Pages 3-7, would be a lot too inaccurate to be used for creep strain measurement and also give no indication of how the creep can be calculated.
Ähnliches
gilt für
Der Erfindung liegt die Aufgabe zugrunde, Bauteile, die bei hohen Temperaturen hohen Drücken ausgesetzt sind, bezüglich des Kriechens kontinuierlich zu überwachen. Derzeit werden solche Aufweitungsmessungen nur diskontinuierlich durchgeführt. Dadurch kann die Aufweitung nur summarisch erfasst und nicht unmittelbar bestimmten Betriebszuständen zugeordnet werden.Of the Invention is based on the object components that are at high temperatures high pressures are exposed, with respect to continuously monitor the creep. Currently, such expansion measurements are only discontinuous carried out. As a result, the expansion can only be summarized and not immediately certain operating conditions be assigned.
Außerdem kann nicht aufgrund der momentanen Kriechgeschwindigkeit Einfluss auf den Betrieb genommen werden.In addition, can not influenced by the current crawl speed to be taken out of service.
Die Lösung dieser Aufgabe erfolgt durch die im Patentanspruch 1 angegebenen Merkmale. Eine vorteilhafte Weiterbildung ist im Anspruch 2 angegeben.The solution This object is achieved by the specified in claim 1 Characteristics. An advantageous development is specified in claim 2.
Es werden also,
- – auf dem zu überwachenden Bauteil Markierungen angebracht oder eine ausreichend charakteristische Oberflächentextur gesucht,
- – diese Markierungen oder die Oberflächentextur werden kontinuierlich optisch beobachtet und so die Entfernung zwischen bestimmten Punkten auf der Oberfläche kontinuierlich gemessen,
- – aus der gleichzeitig gemessenen Wandtemperatur und dem gemessenen Innendruck wird die dadurch bewirkte Änderung der Entfernung der beobachteten Punkte berechnet und dabei zur Erhöhung der Genauigkeit die Tatsache berücksichtigt, dass bei einem hohlzylindrischen Bauteil die Axialspannung die Hälfte der Spannung in Umfangsrichtung zufolge des Innendrucks ist,
- – aus der Differenz zwischen den gemessenen und berechneten Entfernungen kann das Kriechen des Bauteils und auch die Kriechgeschwindigkeit kontinuierlich ermittelt und überwacht werden,
- – bei Umgebungstemperatur in drucklosem Zustand kann jeweils das Kriechen kalibriert werden.
- - Marked on the component to be monitored or sought a sufficiently characteristic surface texture,
- These markings or the surface texture are continuously optically observed, thus continuously measuring the distance between certain points on the surface,
- From the simultaneously measured wall temperature and the measured internal pressure, the change in the distance of the observed points caused thereby is calculated and thereby to the Er increase in accuracy takes into account the fact that, in a hollow cylindrical component, the axial stress is one half of the stress in the circumferential direction due to the internal pressure,
- From the difference between the measured and calculated distances, the creep of the component and also the creeping speed can be continuously determined and monitored,
- - At ambient temperature in a pressureless state, the creep can be calibrated.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10113216A DE10113216B4 (en) | 2001-03-18 | 2001-03-18 | Method for measuring the creep of a hollow cylindrical component at high temperature and high internal pressure and use of the method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10113216A DE10113216B4 (en) | 2001-03-18 | 2001-03-18 | Method for measuring the creep of a hollow cylindrical component at high temperature and high internal pressure and use of the method |
Publications (2)
Publication Number | Publication Date |
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DE10113216A1 DE10113216A1 (en) | 2002-10-02 |
DE10113216B4 true DE10113216B4 (en) | 2005-03-24 |
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DE10113216A Expired - Fee Related DE10113216B4 (en) | 2001-03-18 | 2001-03-18 | Method for measuring the creep of a hollow cylindrical component at high temperature and high internal pressure and use of the method |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2679949A1 (en) | 2012-06-28 | 2014-01-01 | Bilfinger Piping Technologies GmbH | Method for measuring elongation |
CN103792117A (en) * | 2014-01-20 | 2014-05-14 | 湘潭大学 | Method for preparing speckles suitable for high-temperature environment |
DE102014223670A1 (en) * | 2014-11-20 | 2016-05-25 | Zf Friedrichshafen Ag | Method and device for determining a mechanical preload of a module |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9400237B2 (en) | 2013-03-15 | 2016-07-26 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Optical method for detecting displacements and strains at ultra-high temperatures during thermo-mechanical testing |
CN105067418B (en) * | 2015-06-17 | 2018-12-28 | 浙江工商大学 | A kind of plastic pallet physical features detection device based on laser scanning |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2526753B2 (en) * | 1975-06-14 | 1979-05-10 | Lasag Ag, Thun (Schweiz) | Method and arrangement for deformation measurement of large objects by means of laser beam reflection |
DE3309951A1 (en) * | 1983-03-19 | 1984-09-20 | Bundesrepublik Deutschland, vertreten durch den Bundesminister für Wirtschaft in Bonn, dieser vertreten durch den Präsidenten der Bundesanstalt für Materialprüfung (BAM), 1000 Berlin | Optoelectronic strainometer |
US4591996A (en) * | 1981-05-18 | 1986-05-27 | Vachon Reginald I | Apparatus and method for determining stress and strain in pipes, pressure vessels, structural members and other deformable bodies |
DE4200173A1 (en) * | 1992-01-07 | 1993-07-08 | Tema Teubner & Mandewirth Gmbh | Tensile testing of e.g. steel specimen - involves recording graduation changes of specimen markings |
DE69324360T2 (en) * | 1993-01-19 | 1999-11-04 | Kabushiki Kaisha Hutech, Tokio/Tokyo | NON-DESTRUCTIVE CONTROL PROCEDURE FOR THE MECHANICAL BEHAVIOR OF AN OBJECT UNDER THE INFLUENCE OF FORCES EVALUATION PROCEDURE AND RELATED APPARATUS |
DE19707968C2 (en) * | 1997-02-27 | 2000-06-21 | Rainer Renz | Method and device for examining the mechanical-dynamic properties of a workpiece |
-
2001
- 2001-03-18 DE DE10113216A patent/DE10113216B4/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2526753B2 (en) * | 1975-06-14 | 1979-05-10 | Lasag Ag, Thun (Schweiz) | Method and arrangement for deformation measurement of large objects by means of laser beam reflection |
US4591996A (en) * | 1981-05-18 | 1986-05-27 | Vachon Reginald I | Apparatus and method for determining stress and strain in pipes, pressure vessels, structural members and other deformable bodies |
DE3309951A1 (en) * | 1983-03-19 | 1984-09-20 | Bundesrepublik Deutschland, vertreten durch den Bundesminister für Wirtschaft in Bonn, dieser vertreten durch den Präsidenten der Bundesanstalt für Materialprüfung (BAM), 1000 Berlin | Optoelectronic strainometer |
DE4200173A1 (en) * | 1992-01-07 | 1993-07-08 | Tema Teubner & Mandewirth Gmbh | Tensile testing of e.g. steel specimen - involves recording graduation changes of specimen markings |
DE69324360T2 (en) * | 1993-01-19 | 1999-11-04 | Kabushiki Kaisha Hutech, Tokio/Tokyo | NON-DESTRUCTIVE CONTROL PROCEDURE FOR THE MECHANICAL BEHAVIOR OF AN OBJECT UNDER THE INFLUENCE OF FORCES EVALUATION PROCEDURE AND RELATED APPARATUS |
DE19707968C2 (en) * | 1997-02-27 | 2000-06-21 | Rainer Renz | Method and device for examining the mechanical-dynamic properties of a workpiece |
Non-Patent Citations (5)
Title |
---|
Handbuch für experimentelle Spannungsanalyse, (Hrsg. C. Rohrbuch), VDI-Verlag, Düsseldorf, 1989, S. 809-826 |
Handbuch für experimentelle Spannungsanalyse, (Hrsg. C. Rohrbuch), VDI-Verlag, Düsseldorf, 1989,S. 809-826 * |
Lexikon der Physik (Hrsg. H. Franke), Bd. 2, 3. Auflage, 1969, S. 883 u. 884 * |
tm-Technisches Messen, 62, 1995, S. 3-7 * |
tm-Technisches Messen, 67, 2000, S. 267-273 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2679949A1 (en) | 2012-06-28 | 2014-01-01 | Bilfinger Piping Technologies GmbH | Method for measuring elongation |
DE102012012861A1 (en) | 2012-06-28 | 2014-01-02 | Bilfinger Piping Technologies GmbH | Method for measuring strains |
CN103792117A (en) * | 2014-01-20 | 2014-05-14 | 湘潭大学 | Method for preparing speckles suitable for high-temperature environment |
CN103792117B (en) * | 2014-01-20 | 2016-01-20 | 湘潭大学 | Preparation is applicable to the method for hot environment speckle |
DE102014223670A1 (en) * | 2014-11-20 | 2016-05-25 | Zf Friedrichshafen Ag | Method and device for determining a mechanical preload of a module |
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Publication number | Publication date |
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DE10113216A1 (en) | 2002-10-02 |
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