DE3243026A1 - Measuring arrangement for detecting cracks - Google Patents
Measuring arrangement for detecting cracksInfo
- Publication number
- DE3243026A1 DE3243026A1 DE19823243026 DE3243026A DE3243026A1 DE 3243026 A1 DE3243026 A1 DE 3243026A1 DE 19823243026 DE19823243026 DE 19823243026 DE 3243026 A DE3243026 A DE 3243026A DE 3243026 A1 DE3243026 A1 DE 3243026A1
- Authority
- DE
- Germany
- Prior art keywords
- light
- measuring arrangement
- fibers
- plastic
- crack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/08—Testing mechanical properties
- G01M11/083—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT]
-
- 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
-
- 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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording 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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
Meßanordnung zum Feststellen von Rissen Measuring arrangement for the detection of cracks
Die Erfindung bezieht sich auf eine Meßanordnung zum Feststellen von Rissen in Prüflingen, mit einem zur Auslösung einer Rißanzeige dienenden und am Prüfling angebrachten Rißdetektor, der nach Patent ( Patentanmeldung P 32 18 430.1 ) aus mit Licht versorgbaren Lichtleitfasern besteht, die in einem aus Kunststoff bestehenden Prüfling eingelegt sind.The invention relates to a measuring arrangement for determining Cracks in test objects, with one serving to trigger a crack indicator and on Test piece attached crack detector, which according to patent (patent application P 32 18 430.1 ) consists of optical fibers that can be supplied with light, which in a plastic existing test specimen are inserted.
Bei der Meßanordnung der zuvor angegebenen Hauptpatentanmeldung werden die Lichtleitfasern z. B. Kunststoffasern, Glasfasern oder Quarzfasern in einen aus Kunststoff bestehenden Prüfling integriert.In the measuring arrangement of the main patent application specified above the optical fibers z. B. plastic fibers, glass fibers or quartz fibers in one integrated test object made of plastic.
Die vorliegende Erfindung geht von der zuvor angegebenen Hauptpatentanmeldung aus und zeigt eine Weiterentwicklung. Diese Weiterentwicklung ist gekennzeichnet durch lichtleitende Glasfasern, die bei der Herstellung glasfaserverstärkter Kunststoffe zwischen den einzelnen Laminatschichten verlegt sind und nach Aushärten des Kunststoffes eine sichtbare Anzeige des Fasergefüges beim Durchleuchten der Fasern mit intemsivem Licht darstellen.The present invention is based on the parent patent application identified above and shows a further development. This further development is marked through light-conducting glass fibers, which are used in the manufacture of glass fiber reinforced plastics are laid between the individual laminate layers and after the plastic has hardened a visible indication of the fiber structure when x-raying the fibers with intemsivem Represent light.
Die erfindungsgemäße Maßnahme hat den Vorteil, die zur Rißerfassung eingesetzten Glasfasern gleichzeitig für eine Verlegungskontrolle der hergestellten faserverstärkten Kunststoffe zu benutzen. Bei der Her- stellung der Kunststoffteile lassen sich die lichtleitenden Glasfasern z. B. in Gitterform zwischen die Laminatschichten verlegen, so daß sich beim Durch leuchten eine sichtbare Anzeige von außen über den Verlauf der Fasern ergibt. Eventuell beim Pressen entstandene Verschiebungen oder Deformationen des Fasergefüges können auf diese Weise zusätzlich mit den zur Auslösung einer Rißanzeige eingelegten lichtleitenden Fasern sichtbar gemacht werden. Bei der Herstellung faserverstärkter Kunststoffe ist es zweckmäßig, vorgefertigtes zur Steigerung der Festigkeit vorgesehenes Fasermateria ( Glasfaser, Kahlenstoffaser) und zwar sog. "Prepreg-Material" mit lichtleitenden Fasern zu durchsetzen. Das Durch leuchten der verlegten Lichtleitfasern wird mit intensivem Licht, vorzugsweise mit Laserlicht vorgenommen, so daß die verlegten Lichtleitfasern durch das Kunststoffteil sichtbar werden und eine Kontrolle für derartig hergestellte Bauteile ermöglichen.The measure according to the invention has the advantage that for crack detection used glass fibers at the same time for a laying control of the manufactured to use fiber-reinforced plastics. At the her- position the plastic parts can be the light-conducting glass fibers z. B. in grid form Lay between the laminate layers so that a visible light is visible when shining through External display of the course of the fibers shows. Possibly created during pressing Displacements or deformations of the fiber structure can also be avoided in this way visible with the light-conducting fibers inserted to trigger a crack indicator be made. When manufacturing fiber-reinforced plastics, it is useful to prefabricated fiber material intended to increase strength (glass fiber, Kahlenstoffaser), namely so-called "prepreg material" to be enforced with light-conducting fibers. The shining through of the laid optical fibers is done with intense light, preferably made with laser light so that the laid optical fibers through the plastic part become visible and enable a control for such manufactured components.
Claims (4)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823243026 DE3243026A1 (en) | 1982-05-15 | 1982-11-20 | Measuring arrangement for detecting cracks |
EP83109651A EP0116685A1 (en) | 1982-11-20 | 1983-09-28 | Optical measuring arrangement for detecting flaws |
US06/549,393 US4603252A (en) | 1982-11-20 | 1983-11-07 | Determination of the integrity of part of structural materials |
JP21108783A JPS606853A (en) | 1982-11-20 | 1983-11-11 | Measuring device detecting crack |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823218430 DE3218430A1 (en) | 1981-03-26 | 1982-05-15 | Measuring arrangement for determining cracks |
DE19823243026 DE3243026A1 (en) | 1982-05-15 | 1982-11-20 | Measuring arrangement for detecting cracks |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3243026A1 true DE3243026A1 (en) | 1984-05-24 |
Family
ID=25801852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19823243026 Ceased DE3243026A1 (en) | 1982-05-15 | 1982-11-20 | Measuring arrangement for detecting cracks |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3243026A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0384649A2 (en) * | 1989-02-21 | 1990-08-29 | Simmonds Precision Products Inc. | Optical fibre mounting arrangements and methods |
US5142141A (en) * | 1990-09-19 | 1992-08-25 | The Boeing Company | Crack growth measurement network with primary and shunt optical fibers |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2036336A (en) * | 1978-09-29 | 1980-06-25 | British Petroleum Co | Measuring stress and strain using optical fibres |
US4221962A (en) * | 1978-04-24 | 1980-09-09 | Northrop Corporation | Fiber-optic moisture sensor for composite structures |
EP0038401A1 (en) * | 1980-04-22 | 1981-10-28 | Philips Kommunikations Industrie AG | Method of controlling the physical parameters of structural members |
DE3111858A1 (en) * | 1981-03-26 | 1982-10-14 | Vereinigte Flugtechnische Werke Gmbh, 2800 Bremen | Measuring arrangement for detecting cracks |
-
1982
- 1982-11-20 DE DE19823243026 patent/DE3243026A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4221962A (en) * | 1978-04-24 | 1980-09-09 | Northrop Corporation | Fiber-optic moisture sensor for composite structures |
GB2036336A (en) * | 1978-09-29 | 1980-06-25 | British Petroleum Co | Measuring stress and strain using optical fibres |
EP0038401A1 (en) * | 1980-04-22 | 1981-10-28 | Philips Kommunikations Industrie AG | Method of controlling the physical parameters of structural members |
DE3111858A1 (en) * | 1981-03-26 | 1982-10-14 | Vereinigte Flugtechnische Werke Gmbh, 2800 Bremen | Measuring arrangement for detecting cracks |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0384649A2 (en) * | 1989-02-21 | 1990-08-29 | Simmonds Precision Products Inc. | Optical fibre mounting arrangements and methods |
EP0384649A3 (en) * | 1989-02-21 | 1991-05-15 | Simmonds Precision Products Inc. | Optical fibre mounting arrangements and methods |
US5142141A (en) * | 1990-09-19 | 1992-08-25 | The Boeing Company | Crack growth measurement network with primary and shunt optical fibers |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AF | Is addition to no. |
Ref country code: DE Ref document number: 3218430 Format of ref document f/p: P |
|
8110 | Request for examination paragraph 44 | ||
8162 | Independent application | ||
8131 | Rejection |