CN106404920A - Reference test block for ultrasonic detection of composite-material R corner structure - Google Patents
Reference test block for ultrasonic detection of composite-material R corner structure Download PDFInfo
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- CN106404920A CN106404920A CN201610424401.9A CN201610424401A CN106404920A CN 106404920 A CN106404920 A CN 106404920A CN 201610424401 A CN201610424401 A CN 201610424401A CN 106404920 A CN106404920 A CN 106404920A
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- corner structure
- arc surface
- reference block
- defect
- curvature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
Abstract
The invention provides a reference test block for ultrasonic detection of a composite-material R corner structure. The reference test block is characterized in that an artificial defect is placed in a single-curvature arc surface, connecting planes of two plates, of the R corner structure; the artificial defect is in a rectangular shape; the direction of the long edge of the artificial defect is identical to the direction of the single-curvature arc surface of the R corner structure of the reference test block; the direction of the short edge of the artificial defect is identical to the extending direction of the single-curvature arc surface of the R corner structure of the reference test block; and the length of the short edge is maximal possible defect size prescribed in acceptance grades corresponding to the to-be-tested R corner structure. The invention has the advantages that 1, in the making process of the reference test block for the defect with such a shape, the defect is maximally guaranteed to be located on a R corner radian even if offset of certain positions occurs; 2, the defect may cover the whole area of the R corner radian, so bases are provided for adjustment of the sensitivity of the whole radian detection and for defect determination; and 3, the reference test block applicable to conventional ultrasonic detection and ultrasonic phased array detection.
Description
Technical field
The present invention relates to a kind of composite R corner structure ultrasound detection reference block, belong to lossless
Detection technique field.
Background technology
Composite R corner structure is one of military aircraft structure common structure form, carrier-borne aircraft
Hatch door, all have R corner structure in the product such as wallboard, some other labyrinth product is likely to wrap
Containing little curvature structure.This structure, during curing molding, is easier compared with plane position because tree
The uneven or state of cure of fat flowing is not enough etc., and reason causes the defects such as hole, layering, unsticking,
Fiber filling area is also easy to because fiber filling is not enough or resin flows bad and forms hole defect.
And, when R corner structure is internal and nearby defect, after product stress, the extension speed of defect
Rate is greater than the spreading rate that defect is located in laminate.Therefore, the matter to composite R corner structure
Amount controls particularly significant.The aviations such as American and Britain are made the country prosperous, and constantly the advanced Dynamic Non-Destruction Measurement of development is to R
Corner structure carries out quality and checks on, and it has been formulated with strict acceptance criteria.Although China also recognizes
To the importance of integration joint quality detection, but attention degree and technical merit lag far behind English
Man of the U.S., can not meet the fast-developing needs of China's composite product.Lift China R as early as possible
Corner structure detection technique level, reverses detection technique and the unmatched passive situation of Materials, compels
In the eyebrows and eyelashes.
Design and produce the detection reference block of R angle, can be used to adjust detection sensitivity, judge to lack
Sunken buried depth and size, are to ensure that necessary condition that is reliable, accurately detecting defect.Each detection mark at present
Or square shape generally circular to the regulation of artificial defect in composite reference block in standard,
The artificial defect of this shape easily produces position deviation in manufacturing process, thus leading to R corner structure
Radian position there is no artificial defect；And, circular and square flaw size is limited, is difficult to cover
Cover the circular arc sector of whole R corner structure, thus causing nobody during some angle circular arc location detection
Work defect is compared, and adjusts to detection sensitivity and brings error.
Content of the invention
The present invention is exactly directed to above-mentioned R corner structure detection accuracy and reliability requirement and devises one
Plant composite R corner structure ultrasound detection reference block, its objective is ultrasonic for R corner structure
The evaluation of adjustment of sensitivity and defect buried depth, size during detection, and ensure detect accuracy and can
By property.
The purpose of the present invention is achieved through the following technical solutions：
The present invention is a kind of composite R corner structure ultrasound detection reference block, described R angle knot
Structure is the single-curvature arc surface (2) connecting two plate level (1), and the circular arc of single-curvature arc surface (2) is bent
Rate radius is more than 3mm, and less than 25mm, the circular arc opening angle of single-curvature arc surface (2) is more than 30
°, less than 180 °, described single-curvature arc surface (2) is referred to as circular cross-section along the section in circular arc direction
(3), the thickness of circular cross-section (3) is identical with the thickness of plate level (1), this circular cross-section (3) with above-mentioned
Two plate level (1) vertical it is characterised in that：Contrast for this R corner structure ultrasound detection
The material of test block (4), R corner structure are identical with detected R corner structure with preparation technology, in contrast
Three pieces of rectangular artificial defect films (5) of setting inside test block (4), this artificial defect film (5) is two
Strata tetrafluoroethene film is formed by stacking, and the thickness of individual layer polytetrafluoroethylene film is less than 0.05mm,
This three pieces rectangular artificial defect films (5) are respectively upper surface in the internal position of reference block (4)
Between 2～3 layers of prepreg, between two intermediate layer prepregs, between 2～3 layers of prepreg of lower surface,
Along the single-curvature arc surface (2) of reference block (4) R corner structure between adjacent artificial defect film (5)
The distance of bearing of trend (6) is more than 25mm；
The long side of this three pieces rectangular artificial defect films (5) and reference block (4) R corner structure
Single-curvature arc surface (2) circular arc direction (7) is consistent, and the two ends on long side are all beyond single-curvature arc surface (2)
Circular cross-section (3) two ends at least 5mm, the short length of this three pieces rectangular artificial defect films (5) with
Single-curvature arc surface (2) bearing of trend (6) of reference block (4) R corner structure is consistent, and the length of minor face
Maximum specified in detected R corner structure corresponding examination rank there may be flaw size.
In reference block (4), the method for manufacturing artificial defect is complete with reference to GJB 1038.1A-2004
Become, this kind of artificial defect in reference block (4) even if manufacturing process in there is the skew of certain position,
Also the guarantee defect remaining to maximum possible still on the radian of R angle, in addition, this kind of artificial defect can
To cover whole R angle radian region, adjustment and determining defects for whole radian detection sensitivity carry
For foundation.Empirical tests, the detection sensitivity being adjusted using this rectangle artificial defect, with circular and
Square artificial defect is identical.
Technical solution of the present invention has the advantage that with beneficial effect is：
1st, the defect of this shape is in reference block manufacturing process, even if there is the inclined of certain position
Move, the guarantee defect also remaining to maximum possible is still on the radian of R angle；
2nd, this defect can cover whole R angle radian region, for the tune of whole radian detection sensitivity
Whole and determining defects provide foundation；
3rd, detection accuracy and reliability are improved；
4th, can be used for conventional Ultrasound detection and ultrasonic phase array detection.
Brief description
Fig. 1 is that the R corner structure reference block circular cross-section of present invention design is closed with plate level position
It is side view
Fig. 2 is to be 5mm for embodiment one radius of curvature, and R angle opening radian is 90 ° compound
The reference block of material R corner structure design, in this R corner structure acceptance condition, regulation allows presence
Greatest drawback is 3mm；
Fig. 3 is to be 8mm for embodiment two radius of curvature, and R angle opening radian is 60 ° compound
The reference block of material R corner structure design, in this R corner structure acceptance condition, regulation allows presence
Greatest drawback is 6mm；
Specific embodiment
Below with reference to drawings and Examples, technical solution of the present invention is further described：
Referring to shown in accompanying drawing, using technical solution of the present invention, two kinds of composite R corner structures are carried out
Reference block designs.Fig. 2 show the composite R corner structure contrast for embodiment one design
Test block, this R corner structure is the single-curvature arc surface (2) connecting two plate level (1), and single-curvature is justified
The circular arc curvature radius of cambered surface (2) is 5mm, and the circular arc opening angle of single-curvature arc surface (2) is 90
°, described single-curvature arc surface (2) is referred to as circular cross-section (3), circular cross-section along the section in circular arc direction
(3) thickness is identical with the thickness of plate level (1), is 2mm, this circular cross-section (3) and above-mentioned two
Plate level (1) is vertical.In this R corner structure, the minor face of prefabricated artificial defect film (5) is 3mm, long
Side is 18mm.
Fig. 3 show the composite R corner structure reference block for embodiment two design, this R
Corner structure is the single-curvature arc surface (2) connecting two plate level (1), the circle of single-curvature arc surface (2)
Arc radius of curvature is 8mm, and the circular arc opening angle of single-curvature arc surface (2) is 60 °, described single
Rate arc surface (2) is referred to as circular cross-section (3) along the section in circular arc direction, the thickness of circular cross-section (3) with flat
The thickness of plate plane (1) is identical, is 5mm, this circular cross-section (3) and above-mentioned two plate level (1)
Vertically.In this R corner structure, the minor face of prefabricated artificial defect film (5) is 6mm, and long side is 22mm.
Embodiment one with reference block (4) manufacturing process in embodiment two is：Select and detected R angle
Structure identical material and manufacture craft make R corner structure reference block (4), using two-layer single monolayer thick
Spend the superposition of the polytetrafluoroethylene film for 0.05mm and make artificial defect film (5), make contrast
During test block (4) lays prepreg, respectively artificial defect film (5) is placed on upper surface 2～3
Between layer prepreg, between two intermediate layer prepregs, between 2～3 layers of prepreg of lower surface, adjacent
Artificial defect film (5) between along reference block (4) R corner structure single-curvature arc surface (2) extend
Direction (6) apart from d be 25mm, the long side of this three pieces rectangular artificial defect films (5) with right
More consistent than single-curvature arc surface (2) the circular arc direction (7) of test block (4) R corner structure, and the two ends on long side are equal
Circular cross-section (3) two ends at least 5mm beyond single-curvature arc surface (2), this three pieces rectangular artificial
The minor face of defect film (5) and single-curvature arc surface (2) bearing of trend (6) of reference block (4) R corner structure
Unanimously.
The reference block (4) made by above-mentioned requirements is respectively used to R in embodiment one and embodiment two
The detection of corner structure product.During detection, by detection probe placement in single-curvature arc surface (2) surface,
Find three artificial defect films (5) being positioned in reference block (4) respectively, and adjust probe acoustic beam
Incident angle, makes each artificial defect film (5) reflected signal amplitude reach highest, conditioning instrumentation increases
Benefit, makes each artificial defect film (5) highest reflected signal amplitude all reach detector display screen full scale
80%, detection sensitivity now is as the detection sensitivity of corresponding R corner structure product.Using
Detection sensitivity detects to R corner structure, by the abnormal signal occurring in testing result show with
The reflected signal of artificial defect film (5) compares, the buried depth to the abnormal signal detecting and size
Make judge.
Claims (1)
1. a kind of composite R corner structure ultrasound detection reference block, described R corner structure is even
Connect the single-curvature arc surface (2) of two plate level (1), the circular arc curvature radius of single-curvature arc surface (2)
More than 3mm, less than 25mm, the circular arc opening angle of single-curvature arc surface (2) is more than 30 °, little
In 180 °, described single-curvature arc surface (2) is referred to as circular cross-section (3), circle along the section in circular arc direction
The thickness in arc section (3) is identical with the thickness of plate level (1), and this circular cross-section (3) is put down with above-mentioned two
Plate plane (1) vertical it is characterised in that：Reference block (4) for this R corner structure ultrasound detection
Material, R corner structure and preparation technology identical with detected R corner structure, in reference block (4)
Three pieces of rectangular artificial defect films (5) of internal setting, this artificial defect film (5) is two stratas four
Fluoroethylene film is formed by stacking, and the thickness of individual layer polytetrafluoroethylene film is less than 0.05mm, this three pieces
Rectangular artificial defect film (5) is respectively upper surface 2～3 in the internal position of reference block (4)
Between layer prepreg, between two intermediate layer prepregs, between 2～3 layers of prepreg of lower surface, adjacent
Artificial defect film (5) between along reference block (4) R corner structure single-curvature arc surface (2) extend
Direction (6) apart from d be more than 25mm；
The long side of this three pieces rectangular artificial defect films (5) and reference block (4) R corner structure
Single-curvature arc surface (2) circular arc direction (7) is consistent, and the two ends on long side are all beyond single-curvature arc surface (2)
Circular cross-section (3) two ends at least 5mm, the minor face of this three pieces rectangular artificial defect films (5) with
Single-curvature arc surface (2) bearing of trend (6) of reference block (4) R corner structure is consistent, and the length of minor face
Maximum specified in detected R corner structure corresponding examination rank there may be flaw size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424401.9A CN106404920A (en) | 2016-06-15 | 2016-06-15 | Reference test block for ultrasonic detection of composite-material R corner structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424401.9A CN106404920A (en) | 2016-06-15 | 2016-06-15 | Reference test block for ultrasonic detection of composite-material R corner structure |
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| Publication Number | Publication Date |
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| CN106404920A true CN106404920A (en) | 2017-02-15 |
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| CN201610424401.9A Pending CN106404920A (en) | 2016-06-15 | 2016-06-15 | Reference test block for ultrasonic detection of composite-material R corner structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406629A (en) * | 2018-10-15 | 2019-03-01 | 成都飞机工业（集团）有限责任公司 | A kind of test block of the angle R and production method for composite structure ultrasound detection |
| CN111989200A (en) * | 2018-06-15 | 2020-11-24 | 三菱重工业株式会社 | Mold for laminating prepreg and method for laminating prepreg |
| CN112763583A (en) * | 2021-04-07 | 2021-05-07 | 成都飞机工业（集团）有限责任公司 | Calibration block for ultrasonic phased array sector scanning and manufacturing and using methods |
| CN113221398A (en) * | 2021-03-31 | 2021-08-06 | 成都飞机工业（集团）有限责任公司 | Method for predicting L-shaped composite material part curing deformation rebound angle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111989200A (en) * | 2018-06-15 | 2020-11-24 | 三菱重工业株式会社 | Mold for laminating prepreg and method for laminating prepreg |
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| CN113221398A (en) * | 2021-03-31 | 2021-08-06 | 成都飞机工业（集团）有限责任公司 | Method for predicting L-shaped composite material part curing deformation rebound angle |
| CN113221398B (en) * | 2021-03-31 | 2022-08-12 | 成都飞机工业（集团）有限责任公司 | Method for predicting L-shaped composite material part curing deformation rebound angle |
| CN112763583A (en) * | 2021-04-07 | 2021-05-07 | 成都飞机工业（集团）有限责任公司 | Calibration block for ultrasonic phased array sector scanning and manufacturing and using methods |
| CN112763583B (en) * | 2021-04-07 | 2021-08-03 | 成都飞机工业（集团）有限责任公司 | Calibration block for ultrasonic phased array sector scanning and manufacturing and using methods |
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Application publication date: 20170215 |
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