CN1139797C - Technology for braiding composite material in optical fibre sensor and method for testing its performance - Google Patents
Technology for braiding composite material in optical fibre sensor and method for testing its performance Download PDFInfo
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- CN1139797C CN1139797C CNB01108037XA CN01108037A CN1139797C CN 1139797 C CN1139797 C CN 1139797C CN B01108037X A CNB01108037X A CN B01108037XA CN 01108037 A CN01108037 A CN 01108037A CN 1139797 C CN1139797 C CN 1139797C
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- braiding
- optical sensor
- fibre optical
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- fiber sensor
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- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000009954 braiding Methods 0.000 title claims abstract description 17
- 239000013307 optical fiber Substances 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 title claims abstract description 13
- 238000005516 engineering process Methods 0.000 title claims description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 238000001721 transfer moulding Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 21
- 230000003287 optical effect Effects 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 4
- 238000009941 weaving Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 2
- 239000011888 foil Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006735 deficit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000011157 advanced composite material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
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Abstract
The present invention relates to a process for braiding an optical-fiber sensor in braiding composite materials and a method for testing properties, which belongs to a technical process for braiding composite materials and a method for testing material properties. A resin transfer molding process mold which is composed of an upper cover a, a cavity mold b and a base plate c is used for braiding a point optical-fiber sensor a distributed optical-fiber sensor in braiding a composite material structure. The specific braiding method comprises two kinds: (1) the optical fiber sensor and the braiding materials are braided together; (2) the optical fiber sensor is used for braiding in one layer or a plurality of layers. The present invention can monitor the technical process for braiding composite materials and can test various parameters in the composite materials, so that test analysis for mechanical properties and damage situations is accurate and reliable.
Description
Involved in the present invention is to utilize to enroll the woven composite technological process of Fibre Optical Sensor and the monitoring method of material property.
Woven composite is the focus and the forward position of advanced composite material research in recent years.Its outstanding feature is the significant deficiency that has overcome compound substance interlayer fragility.It can directly knit out special-shaped integral fabric by the size of the shape and size of part, has reduced manufacturing cost.At present, woven composite has been used to fields such as military affairs, covil construction and medical treatment, as by-pass air duct radome fairing of rocket engine case, early warning plane antenna disk cover, engine etc.Woven composite also has urgent application demand in national defense industry, but people also are nowhere near a difficult problem that has a lot of urgent needs to solve to its understanding.Especially the damage and failure mechanism of D braided composites and the understanding of phenomenon also are nowhere near, existing experimental data is very not comprehensive, sometimes also conflicting, the strain detecting technology that adopts in the conventional mechanical property test is not too suitable to D braided composites, because there is local unevenness in braided material, foil gauge in use, the size of foil gauge can exert an influence to measurement result, and foil gauge can only do the measurement of surperficial strain, can't understand the situation of material internal.These a series of problems have caused great difficulty for the mechanical characteristic of correct understanding D braided composites.
Fibre Optical Sensor have in softness, deflection, electrical isolation, corrosion-resistant, the work do not generate heat, radiationless, unique advantage such as anti-electromagnetic interference capability strong, can work under rugged surroundings such as inflammable and explosive and poisonous gas, existing lot of documents has been reported the research of this sensor being imbedded the existing intellectual material structure of laminated composite material solid.For D braided composites, Fibre Optical Sensor also is well suited for enrolling D braided composites, so that material property and material technology process are studied.In fact, the technological process of woven composite does not need to resemble and increases temperature high pressure the laminated composite, and this point more helps the application of Fibre Optical Sensor.Fibre Optical Sensor can a plurality ofly enroll in the woven composite structure, the various parameters of test material inside easily, and this is that conventional laboratory facilities institute based on foil gauge can't accomplish, makes that performance state test and Parameters Monitoring are more accurate, reliably.
The objective of the invention is to develop and a kind of Fibre Optical Sensor is enrolled in the woven composite, material members is had in real time from detecting and self-diagnostic function, so that the technological process of monitoring woven composite detects the various parameters of composite inner, make that the test analysis of mechanical property and degree of impairment is accurate more, reliable.
Of the present inventionly enroll the woven composite technology of Fibre Optical Sensor and the method for testing of performance is to enroll two kinds of sensors in the woven composite structure: (1) point type Fibre Optical Sensor, strain, damage, interface conditions and the temperature, the pressure and other parameters that are used for realizing material key point place are carried out precision measurement, as Fabry-Parot Fibre Optical Sensor, Bragg grating fibers sensor.(2) distributed fiberoptic sensor is to monitor the univers parameter of D braided composites structure, as adopting light time territory lift-off technology etc.
Concrete weaving method can adopt following two kinds: (1) optical fiber weaves with braided material, but optical fiber is not really participated in braiding, but is in all the time in a certain braid, and optical fiber can keep straight like this, does not produce the braiding bending; (2) optical fiber is participated in certain one deck or which floor braiding, the bending that exists braiding to cause.During detection, can directly utilize the microbending effect detected parameters of Fibre Optical Sensor;
Technology of the present invention is resin transfer molding technology (RTM technology), because this technology is suitable for woven composite most.Its flow process mainly comprises: cleaning mold, be coated with remover, and place preformed member, close die is injected resin, resin solidification, die sinking.
RTM technology is a kind of closed moulding technology, to the requirement of mould than higher, the impermeability of especially having relatively high expectations, this brings difficulty just for drawing of optical fiber.For this reason, our specialized designs mould, problem such as solved the protection of optical fiber and draw.Steel mould has high temperature resistant, the surface quality height of goods, and advantages such as life-span length, thereby adopt steel mould in the experiment.Mould adopts array configuration, and locking and die-sinking device are arranged.Seal form adopts slot type, and encapsulant is the solid rubber pipe.In the swaging die of mould, use the inserts that is drilled with pore.From the drawing of test specimen, the glass fibre tubule is enclosed within outside of fiber at optical fiber, from the pore of inserts, leads in the cavity at swaging die two ends again.By this design, solved the impermeability of mould and the optical fiber contradiction between drawing.And, can prevent effectively that optical fiber from contacting with resin and become fragile, and fracture easily.
Utilize this mould, adopt above-mentioned method of enrolling Fibre Optical Sensor to monitor to the various parameters of D braided composites in the RTM technological process, to instruct technological process, utilize the Fibre Optical Sensor enroll simultaneously to the research that experimentizes of mechanical property, interface conditions and the Damage and Failure mechanism of woven composite.For the mechanical behavior of determining D braided composites and structure thereof, set up appropriate grand thin sight model and realize that mechanical property and degree of impairment forecast provide new experimental technique and means accurately.
Accompanying drawing 1. resin transfer molding process mould structural representations.
It is by loam cake a, and swaging die b and base plate c constitute.Wherein swaging die central authorities are the microscler inserts with pore 52, and shown in the d figure among the figure, the inserts two ends communicate with cavity 1, are surrounded by ovaloid seal groove 3 around it.Number in the figure 4 is a through hole, and the hole is corresponding therewith, and figure a, figure c have this hole, the usefulness of assembling.
Claims (2)
1, a kind of woven composite technology of Fibre Optical Sensor and method of testing of performance of enrolling, it is characterized in that, the resin transfer molding process mould that utilization is made of loam cake (a), swaging die (b) and base plate (c), in the woven composite structure, enroll the Fibre Optical Sensor of two kinds of forms: point type Fibre Optical Sensor and distributed fiberoptic sensor, its concrete weaving method has two kinds:
(1), Fibre Optical Sensor weaves with braided material, its optical fiber is not really participated in braiding, and is in all the time in a certain braid;
(2), Fibre Optical Sensor is participated in certain one deck or which floor braiding, the buckling phenomenon that its optical fiber existence is caused because of braiding.
2, the woven composite technology of Fibre Optical Sensor and the method for testing of performance of enrolling according to claim 1 is characterized in that there is an inserts (2) with pore in die cavity film central authorities.Inserts (2) two ends communicate with cavity (1), are surrounded by ovaloid seal groove (3) around it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01108037XA CN1139797C (en) | 2001-01-11 | 2001-01-11 | Technology for braiding composite material in optical fibre sensor and method for testing its performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01108037XA CN1139797C (en) | 2001-01-11 | 2001-01-11 | Technology for braiding composite material in optical fibre sensor and method for testing its performance |
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| Publication Number | Publication Date |
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| CN1303009A CN1303009A (en) | 2001-07-11 |
| CN1139797C true CN1139797C (en) | 2004-02-25 |
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| CNB01108037XA Expired - Fee Related CN1139797C (en) | 2001-01-11 | 2001-01-11 | Technology for braiding composite material in optical fibre sensor and method for testing its performance |
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Families Citing this family (10)
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| ES2672789T3 (en) * | 2004-01-23 | 2018-06-18 | Lm Wind Power International Technology Ii Aps | Device that includes a system adapted for use in temperature compensation of tension measurements of fiber reinforced structures |
| CN100443890C (en) * | 2006-06-02 | 2008-12-17 | 北京航空航天大学 | LCM process DC resistance real-time monitoring method |
| CN101487832B (en) * | 2009-02-10 | 2013-08-21 | 哈尔滨工业大学 | Method for characterizing epoxy resin composite material interface mechanism |
| CN101819166B (en) * | 2009-02-26 | 2012-03-21 | 沈阳航空工业学院 | Method for monitoring chirped-grating of debonding and extended composite material cementing joint |
| CN102555227A (en) * | 2011-11-15 | 2012-07-11 | 中国航空工业集团公司北京航空材料研究院 | Method for monitoring impact threats of composite material part structure in non-interference mode |
| CN107091615B (en) * | 2017-06-14 | 2023-07-14 | 四川睿铁科技有限责任公司 | Intelligent geotechnical cloth suitable for monitoring and controlling deformation of high-speed railway foundation |
| EP3639001A4 (en) | 2017-06-16 | 2021-03-10 | Saint-Gobain ADFORS Canada, Ltd. | Sensing textile |
| CN109708807B (en) * | 2019-01-04 | 2020-12-25 | 北京玻钢院复合材料有限公司 | Calibration method and device for built-in optical fiber sensor of composite material container |
| CN111366267B (en) * | 2020-04-01 | 2022-01-07 | 大连理工大学 | Method and device for monitoring internal temperature field in three-dimensional woven composite material forming process |
| CN111366095A (en) * | 2020-04-01 | 2020-07-03 | 大连理工大学 | Strain monitoring method and device in three-dimensional woven composite material forming process |
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