CN105181553B - A kind of carbon fibre composite laminate porosity non-destructive testing sample selects method - Google Patents
A kind of carbon fibre composite laminate porosity non-destructive testing sample selects method Download PDFInfo
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Abstract
The present invention relates to a kind of selection methods of carbon fibre composite laminate porosity non-destructive testing sample.It is solved since existing manufacturing technology is difficult to produce the porosity sample of even pore distribution, thus can not detect the problem of being provided with experimental study with uniform pores test block for composite laminated plate porosity.The method of the present invention is that the supersonic detection method used carries out C-scan image checking to sample, changed with C-scan color of image as foundation, the region chosen wave amplitude variation less and be evenly distributed is marked, then the part on sample corresponding with the region is cut down and detects test block as porosity.The advantages of technical solution of the present invention is：1st, the porosity sample for ensureing to choose has more uniform distribution of pores；2nd, ensure the accuracy at porosity sample interception position；3rd, reduce the error that metallographic method measures porosity result；4th, ensure that the volumetric porosity that the area porosity that metallographic method measures is measured with ultrasound detection has preferable correspondence.
Description
Technical field
The present invention relates to a kind of selection methods of carbon fibre composite laminate porosity non-destructive testing sample, belong to nothing
Damage detection technique field.
Background technology
Hole is one of major defect in composite material, and the increase of hole seriously affects mechanical property, external first
Stringent porosity detection method formulated composite laminated plate product into airline, and still lack at present can in China
For instructing actually detected composite material porosity detection method in industry.With the quick hair of manufacture technology of composite material
Exhibition, application of the composite product on military aircraft is more and more, however, the porosity inspection of laminated plate structure cannot be carried out
It surveys, becomes the major hidden danger for influencing Flight Safety.To ensure Flight Safety, detection technique and advanced material are realized
Manufacturing technology matches, it is necessary to carry out composite laminated plate porosity detection method research and method formulates work.
The composite laminated plate porosity sample of even pore distribution is the necessity for carrying out porosity non-destructive testing research
Condition.However, due to porosity sample mainly by adjust the parameters such as the temperature in curing process, pressure, hardening time come
It realizes, ununified manufacture craft standard, specified porosity is produced by technology controlling and process and hole uniformly divides so more difficult
The test block of cloth.
Invention content
The present invention is exactly that a kind of carbon fiber for making the phenomenon that difficult for above-mentioned uniform porosity test block and designing is compound
The selection method of material laminate porosity sample, the purpose is to can be effectively obtained the carbon fibre composite being evenly distributed
Laminate porosity test block provides subjects for carbon fibre composite porosity detection method research, is detected for porosity
Reference data is provided.
The purpose of the present invention is achieved through the following technical solutions：
A kind of carbon fibre composite laminate porosity non-destructive testing sample selects method, it is characterised in that：This method
The step of it is as follows：
Step 1 carries out carbon fibre composite laminate sample 1 of the thickness more than 10mm using water jet through transmission technique
C-scan detects, and carbon fibre composite laminate sample 1 of the thickness less than 10mm is carried out using glass plate pulse reflection method
C-scan detects, use water jet through transmission technique carry out the device parameter of C-scan detection for：4 bore of water jet of water jacket 2 be less than etc.
In 6mm, 3 frequencies of probe are 5MHz~10MHz, and minimum sampling interval is less than or equal to 0.5mm, and different colours are shown in C-scan image
Show that representing sound wave passes through the intensity of acoustic wave after tested test specimens, C-scan color of image resolution ratio reaches 128 grades or more；Using
Glass plate pulse reflection method carry out C-scan detection device parameter be：5 diameter range of chip of probe 3 is 9mm~19mm, is visited
First 3 frequency is 5MHz~10MHz, and minimum sampling interval is less than or equal to 0.5mm, and different colours show representative in C-scan image
Sound wave passes through the intensity of acoustic wave after tested test specimens, and C-scan color of image resolution ratio reaches 128 grades or more；
Step 2 observes the region that imaging color change is little in initial option C-scan image by visual observation first, then
The square-shaped frame 6 for being not less than 50mm × 50mm in the region is selected, reads and records each pixel pair in the square-shaped frame 6
The wave amplitude answered calculates the maximum rate of change N of wave amplitude in the square-shaped frame 6 by the following formula；
N=(b-a)/b
In formula：The maximum rate of change of wave amplitude in N square-shaped frames 6, wave amplitude minimum value in a square-shaped frames 6, b is just
Wave amplitude maximum value in square box 6；
If N ＞ 10%, 6 internal porosity of square-shaped frame variation is unsatisfactory for porosity test block screening requirement, need to be to C-scan
Image carries out again the maximum rate of change N of wave amplitude in frame choosing and calculation block choosing, until N≤10%；
Step 3, by the C-scan image of carbon fibre composite laminate sample 1 by 1: 1 size marking on blank sheet of paper 7,
And blank sheet of paper 7 is covered on carbon fibre composite laminate sample 1, make C-scan image and the carbon fiber composite on blank sheet of paper
The limit of bed of material plywood sample 1 coincide, and the edge for the square-shaped frame 6 then selected along C-scan image is to carbon fiber composite
Bed of material plywood sample 1 carries out low speed wire cutting, obtains carbon fibre composite laminate porosity test block 8 after the completion.
The present invention has the advantage that is with advantageous effect：
1st, the porosity test block for ensureing to choose has more uniform distribution of pores；
2nd, ensure the accuracy at porosity test block interception position；
3rd, reduce the error that metallographic method measures porosity result；
4th, ensure that the area porosity of metallographic method measurement and the volumetric porosity that ultrasound detection measures have preferable corresponding pass
System.
Description of the drawings
Fig. 1 is the schematic diagram that C-scan detection is carried out using water jet through transmission technique
Fig. 2 is the schematic diagram that C-scan detection is carried out using glass plate pulse reflection method
Fig. 3 is the schematic diagram for preparing carbon fibre composite laminate porosity test block 8
Fig. 4 is the software flow pattern handled C-scan image
Specific embodiment
Technical solution of the present invention is further described below with reference to drawings and examples：
The embodiment of the present invention selects the carbon fibre composite laminate of 12mm and 6mm, and step 1 is the carbon fiber to 12mm
Composite laminated plate carries out C-scan detection using water jet through transmission technique, as shown in Figure 1, the carbon fibre composite layer to 6mm
Plywood carries out C Scanning Detctions using glass plate pulse reflection method, as shown in Figure 2；
The SM-300 type water-spray ultrasonic C-scans detecting system developed using Beijing Research Inst. of Aeronautic Material carries out water jet wear
Saturating method detection, detection parameters are：4 bore of water jet of water jacket 2 be less than or equal to 6 mm, 3 frequencies of probe be 5MHz, pop one's head in 3 crystalline substance
The a diameter of 12mm of piece, minimum sampling interval are less than or equal to 0.5mm, and different colours show that representing sound wave passes through quilt in C-scan image
The intensity of acoustic wave after sample is detected, C-scan color of image resolution ratio reaches 128 grades or more；
Glass plate pulse-echo is carried out using Israel ScanMaster LS-200 type Water Immersion Ultrasonic C-scans detecting system
Method detects, and detection parameters are：5 diameter range of chip of probe 3 is 19mm, and 3 frequency of popping one's head in is 5MHz~10MHz, and minimum is adopted
Sample is smaller than being equal to 0.5mm, and different colours show that representing sound wave passes through the sound wave after tested test specimens strong in C-scan image
Degree, C-scan color of image resolution ratio reach 128 grades or more；
After step 2, detection, in SM-300 types water-spray ultrasonic C-scan detecting system or LS-200 type water logging Ultrasonic Cs
Testing result in scanning-detecting system is shown under software interface, can obtain the C-scan image of tested test specimens.It sees by visual observation
It examines and the little region of color change is imaged in initial option C-scan image, then selected with mouse frame and be not less than 50mm in the region
The square-shaped frame 6 (a in Fig. 4) of × 50mm shows data processing function conventional in software interface, screening using testing result
And show the minimum value a and maximum value b (b in Fig. 4) of magnitudes of acoustic waves in frame favored area, which is calculated by the following formula
The maximum rate of change N (c in Fig. 4) of wave amplitude in frame 6；
N=(b-a)/b
In formula：The maximum rate of change of wave amplitude in N square-shaped frames 6, wave amplitude minimum value in a square-shaped frames 6, b is just
Wave amplitude maximum value in square box 6；
If N ＞ 10%, 6 internal porosity of square-shaped frame variation is unsatisfactory for porosity test block screening requirement, need to be to C-scan
Image carries out again the maximum rate of change N (d in Fig. 4) of wave amplitude in frame choosing and calculation block the choosing, (figure until N≤10%
In 4 e)；
Step 3, by the C-scan image of carbon fibre composite laminate sample 1 by 1: 1 size marking on blank sheet of paper 7,
The part of square-shaped frame 6 on blank sheet of paper 7 along edge is cut, then blank sheet of paper 7 is covered in carbon fibre composite laminate sample 1
On, C-scan image and the limit of carbon fibre composite laminate sample 1 on blank sheet of paper is made to coincide, then along C-scan image
The edge of selected square-shaped frame 6 carries out low speed wire cutting to carbon fibre composite laminate sample 1, and when cutting should prevent from producing
Layer estranged, phenomena such as splitting, overheating of shaking, obtain carbon fibre composite laminate porosity test block 8 after the completion.
Claims (1)
1. a kind of carbon fibre composite laminate porosity non-destructive testing sample selects method, it is characterised in that：This method
Step is as follows：
Step 1 carries out C for carbon fibre composite laminate sample (1) of the thickness more than 10mm using water jet through transmission technique
Scanning Detction, for thickness less than 10mm carbon fibre composite laminate sample (1) using glass plate pulse reflection method into
Row C-scan detects, use water jet through transmission technique carry out the device parameter of C-scan detection for：Water jet (4) bore of water jacket (2)
Less than or equal to 6mm, probe (3) frequency is 5MHz~10MHz, and minimum sampling interval is less than or equal to 0.5mm, in C-scan image not
Show that representing sound wave passes through the intensity of acoustic wave after tested test specimens with color, C-scan color of image resolution ratio reach 128 grades with
On；Use glass plate pulse reflection method carry out C-scan detection device parameter for：Probe (3) chip (5) diameter range be
9mm~19mm, for the frequency of probe (3) for 5MHz~10MHz, minimum sampling interval is less than or equal to 0.5mm, in C-scan image not
Show that representing sound wave passes through the intensity of acoustic wave after tested test specimens with color, C-scan color of image resolution ratio reach 128 grades with
On；
Step 2 observes the region that imaging color change is little in initial option C-scan image by visual observation first, then selects
It is not less than the square-shaped frame (6) of 50mm × 50mm in the region, reads and record each pixel pair in the square-shaped frame (6)
The wave amplitude answered calculates the maximum rate of change N of square-shaped frame (6) the interior wave amplitude by the following formula；
N=(b-a)/b
In formula：The maximum rate of change of N square-shaped frames (6) interior wave amplitude, the interior wave amplitude minimum value of a square-shaped frames (6), b is just
The interior wave amplitude maximum value of square box (6)；
If N ＞ 10%, square-shaped frame (6) internal porosity variation is unsatisfactory for porosity test block screening requirement, need to be to C-scan figure
Maximum rate of change N as carrying out again wave amplitude in frame choosing and calculation block choosing, until N≤10%；
Step 3, by the C-scan image of carbon fibre composite laminate sample (1) by 1: 1 size marking on blank sheet of paper (7),
And blank sheet of paper (7) is covered on carbon fibre composite laminate sample (1), the C-scan image on blank sheet of paper is made to be answered with carbon fiber
The limit of condensation material laminate sample (1) coincide, and the edge for the square-shaped frame (6) then selected along C-scan image is to carbon fibre
It ties up composite laminated plate sample (1) and carries out low speed wire cutting, obtain the examination of carbon fibre composite laminate porosity after the completion
Block (8).
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| CN108240988A (en) * | 2017-06-23 | 2018-07-03 | 中国电子产品可靠性与环境试验研究所 | Composite material connection structure Outdoor exposure test evaluation of result method |
| CN109212039B (en) * | 2018-10-19 | 2021-07-16 | 中国航发北京航空材料研究院 | Nondestructive measurement method for content of reinforcement in particle-reinforced metal-based composite material |
| CN111999229B (en) * | 2020-08-24 | 2022-09-06 | 海南大学 | Device for identifying surface layer pores of pore structure sample, use method and repair method |
| CN113655128B (en) * | 2021-07-30 | 2024-06-18 | 中国航空工业集团公司济南特种结构研究所 | Zero angle verification method for probe of penetrating ultrasonic C scanning detection system |
| CN113866280B (en) * | 2021-09-17 | 2022-11-29 | 南方电网调峰调频发电有限公司检修试验分公司 | Ultrasonic detection device and method for thin-laminated dielectric composite material |
| CN114216702B (en) * | 2021-11-18 | 2024-06-18 | 保定市立中车轮制造有限公司 | Commercial vehicle hub performance detection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1491887A1 (en) * | 2003-06-27 | 2004-12-29 | intelligeNDT Systems & Services GmbH & Co KG | Method for ultrasonic determination of the porosity of a workpiece |
| CN103552255A (en) * | 2013-10-25 | 2014-02-05 | 中航复合材料有限责任公司 | Method for manufacturing composite material porosity detection comparison sample pieces |
| CN103926313A (en) * | 2013-12-04 | 2014-07-16 | 中航复合材料有限责任公司 | Composite material porosity value evaluation method based on ultrasonic detection |
| CN104407060A (en) * | 2014-11-12 | 2015-03-11 | 上海飞机制造有限公司 | Manufacturing method of porosity reference block for composite material |
| CN104792678A (en) * | 2015-04-08 | 2015-07-22 | 东华大学 | Porosity detection standard test block made of vacuum-assisted resin infused composite material with hollow microspheres as well as preparation method thereof |
| CN104897550A (en) * | 2015-06-17 | 2015-09-09 | 大连理工大学 | Method for confirming relation between porosity of CFRP (carbon fiber reinforced plastics) and ultrasonic attenuation coefficient |
-
2015
- 2015-09-10 CN CN201510574934.0A patent/CN105181553B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1491887A1 (en) * | 2003-06-27 | 2004-12-29 | intelligeNDT Systems & Services GmbH & Co KG | Method for ultrasonic determination of the porosity of a workpiece |
| CN103552255A (en) * | 2013-10-25 | 2014-02-05 | 中航复合材料有限责任公司 | Method for manufacturing composite material porosity detection comparison sample pieces |
| CN103926313A (en) * | 2013-12-04 | 2014-07-16 | 中航复合材料有限责任公司 | Composite material porosity value evaluation method based on ultrasonic detection |
| CN104407060A (en) * | 2014-11-12 | 2015-03-11 | 上海飞机制造有限公司 | Manufacturing method of porosity reference block for composite material |
| CN104792678A (en) * | 2015-04-08 | 2015-07-22 | 东华大学 | Porosity detection standard test block made of vacuum-assisted resin infused composite material with hollow microspheres as well as preparation method thereof |
| CN104897550A (en) * | 2015-06-17 | 2015-09-09 | 大连理工大学 | Method for confirming relation between porosity of CFRP (carbon fiber reinforced plastics) and ultrasonic attenuation coefficient |
Non-Patent Citations (4)
| Title |
|---|
| 复合材料孔隙含量超声检测系统的设计研究;蒋志峰，吴瑞明，吴作伦，宋立军;《玻璃钢/复合材料》;20090430(第4期);第27-31页 * |
| 复合材料孔隙率检测方法及其实现技术的研究;宋立军;《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅰ辑》;20051215;摘要第I页，第37-40页 * |
| 碳纤维增强树脂基复合材料孔隙率超声无损检测;罗明;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20080515;第B020-39页 * |
| 碳纤维复合材料孔隙率便携式超声无损检测系统研制;杨辰龙，周晓军;《传感技术学报》;20070630;第20卷(第6期);第1283-1285页 * |
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