CN109211686A - A kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method - Google Patents
A kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method Download PDFInfo
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- CN109211686A CN109211686A CN201811286800.9A CN201811286800A CN109211686A CN 109211686 A CN109211686 A CN 109211686A CN 201811286800 A CN201811286800 A CN 201811286800A CN 109211686 A CN109211686 A CN 109211686A
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- 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
- G01N2203/0067—Fracture or rupture
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- 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
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- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- Life Sciences & Earth Sciences (AREA)
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- Treatment Of Fiber Materials (AREA)
Abstract
The present invention provides a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation methods, comprising the following steps: (1) prepares two groups of aramid fabric samples；(2) the ultimate strength value under first group of aramid fabric sample difference high temperature ageing time is measured；(3) measurement of chromaticity value is carried out to aramid fabric sample each in second group of sample using color difference meter, calculating value of chromatism is compared with primary sample, standard curve is drawn according to value of chromatism and ultimate strength relationship, digital simulation goes out ultimate strength value color difference analysis equation, color difference critical value when obtaining aramid fabric failure by equation；(4) aramid fabric to be measured is scanned with color difference meter in outfield, compared colour difference's critical value determines whether it fails, if not failing, sample to be tested value of chromatism is substituted into ultimate strength value color difference analysis equation, sample to be tested ultimate strength value is calculated, reference standard data are up to sample to be tested residue high temperature ageing life time.The present invention has the characteristics that convenient test, at low cost, high-efficient.
Description
Technical field
The invention belongs to special woven material aging life-span failure analysis fields, and in particular to a kind of to utilize color difference on-line determination virtue
The method of synthetic fibre fabric residue high temperature ageing life time.
Background technique
Special woven material is applied to aerospace etc. and is related in the industry of national economy, and wherein aramid fabric is being navigated
Empty, most widely used on space product, it is also earliest production application in the textile fabric in aerospace, it has many excellent
Good performance, as: the corrosion of good, the resistance to various chemical reagent of high temperature resistance and very light weight are convenient for construction, specific strength height etc..
However as the severe of the increase or keeping and use condition for storing the time limit, apparent aging can gradually occur in textile material
Phenomenon is similar to discoloration, glossiness decline etc., and occurs the decline of a series of physical and mechanical performance therefrom, makes material of weaving
The use of material is greatly affected.It there are many research about macromolecule material aging and has achieved certain both at home and abroad at present
Progress, textile material also belong to high molecular material, but what is be substantially carried out is the offline destructive detection of high molecular material, such as: Lee
Hai Bin et al. has studied the aramid fiber influence of heat ageing to its structure and performance under condition of different temperatures, the results showed that, aramid fiber
Microstructure does not change significantly under high temperature ageing, and the ultimate strength of fiber is declined；Ma Ling et al. has studied not
The acceleration heat ageing of Light of Mulberry Silk Fabrics under the conditions of synthermal condition and different ageing times, as a result, it has been found that, heat ageing passes through influence
The structure and composition of fiber causes the ultimate strength of fiber to decline to influence fiber physical property；A kind of test macromolecule material
Mentioned in the method for material aging variation laboratory using certain environmental factors under ageing oven simulating natural environment as it is wet, hot,
Light, oxygen, corrosive medium, stress etc. characterize environmental factor to the aging of material and make to destroy the variation of function before and after material aging
With degree, this method is taken time and effort, and can also be damaged to sample and is only applicable to the ageing management in laboratory；One
It is mentioned in the prediction technique in kind underwater geotextiles service life and finished tensile strength is utilized to increase and attenuation law test with ultraviolet radioactive
Underwater geotextiles service life, this method can equally damage sample to cause economic loss.And material is spun for spy
Material include aramid fabric aging on-line checking research almost without.Aramid fabric heat resistant performance requires on 200 DEG C of left sides
It can be used continuously when ultimate strength value is greater than original broken strength value half under the conditions of the right side.Since aramid fabric is applied to rescue more
Raw equipment, in view of the handling characteristics of life-saving equipment, carries out offline destructive test and both took time and effort, and will cause huge economic damage
It loses.Therefore, the online non-destructive testing technology for studying aramid fabric has very important scientific research value and realistic meaning.
Summary of the invention
In view of the problems of the existing technology, it is lossless online to provide a kind of aramid fiber spy woven material high temperature ageing service life by the present invention
Appraisal procedure, it has the characteristics that convenient test, at low cost, high-efficient.
To solve problems of the prior art, The technical solution adopted by the invention is as follows:
A kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method, which comprises the steps of:
Step 1: two groups of aramid fabric samples are prepared, the ultimate strength value of each aramid fabric sample in every group of sample
It is all different, wherein first group of aramid fabric sample is used to measure the ultimate strength value criterion numeral under the different high temperature ageing times
According to second group of aramid fabric sample is for determining ultimate strength value color difference analysis equation；
Step 2: measuring the ultimate strength value of aramid fabric sample under first group of difference high temperature ageing time, and record
The relationship of high temperature ageing time and ultimate strength value determine the aramid fabric high temperature ageing time mark of different ultimate strength values
Quasi- data, and show that the aramid fabric of different ultimate strength values is remaining as stale value by primary sample ultimate strength value half
High temperature ageing time standard data；
Step 3: the measurement of chromaticity value is carried out to aramid fabric sample each in second group of sample using color difference meter, with original
Beginning sample compares calculating value of chromatism, draws standard curve according to value of chromatism and ultimate strength relationship, is built with Partial Least Squares
Vertical mathematical model, calculates fit equation, that is, determines ultimate strength value color difference analysis equation, can obtain aramid fabric by equation
Color difference critical value when failure；
Step 4: be measured in the aramid fabric residue high temperature ageing service life that survey is treated in outfield, with color difference meter scanning to
The aramid fabric of survey, compared colour difference's critical value determine whether it fails, if not failing, the value of chromatism of sample to be tested is substituted into fracture
Strength value color difference analysis equation, calculates ultimate strength value, according to ultimate strength value calculated result, compares different ultimate strength values
Aramid fabric residue high temperature ageing time standard data can calculate the aramid fabric residue high temperature ageing service life.
Each aramid fabric is equal from the sampling of same fabric, sample size in two groups of aramid fabric samples in the step 1
It is identical.
The high temperature ageing time of two groups of aramid fabric samples corresponds in the step 1, i.e. two groups of aramid fabric samples
Middle sample ultimate strength value corresponds respectively.
The step 2 high temperature aging is carried out in constant temperature ageing oven, and constant temperature ageing oven temperature remains 200 DEG C.
The aramid fabric residue high temperature ageing life time of different ultimate strength values is strong by being broken in the step 2
The high temperature ageing time that high temperature ageing time when force value is reduced to primary sample ultimate strength value half subtracts sample obtains.
Primary sample refers to not aged primary sample in the step 3.
According to the relationship of sample value of chromatism and its ultimate strength value in the step 3, analyzed using OriginPro 9.1
Software founding mathematical models draw out the standard curve of aramid fabric sample value of chromatism Yu its ultimate strength value, use minimum two partially
Multiplication calculates fit equation.
In the step 3 when aramid fabric ultimate strength value is reduced to the half of original broken strength value, aramid fabric
Failure.
The present invention has the advantage that
The method in measurement aramid fabric residue high temperature ageing service life provided by the invention is the method for online non-destructive testing, should
The method is simple and quick, can scene detected, be effectively shortened aramid fabric high temperature ageing detection time, greatly improve
Detection efficiency, while this method will not cause to damage compared with traditional offline destructive degradation detecting method to sample
It is bad, a large amount of financial resources and material resources are saved in this way.The present invention has the new method for developing the online non-destructive testing of textile material
Directive significance.
Detailed description of the invention
Fig. 1 is implementation flow chart of the present invention.
Specific embodiment
Below by way of examples and with reference to the accompanying drawings 1, the technical solutions of the present invention will be further described:
1, the aramid fabric sample for measuring the ultimate strength value normal data under the different high temperature ageing times is prepared first
Product:
It is sampled from same aramid fabric, sample size is all the same, and length and width is respectively the standard aramid fiber face of 150mm × 50mm
Expect ultimate strength test bars.
2, aramid fabric batten high-temperature circulation test is carried out:
It after batten is numbered, is hooked on sample stage with exclusive clamps, is mutually not in contact with each other, to everything in readiness, shut perseverance
Warm ageing oven chamber door connects power supply, opens " power switch " and " heater switch ", temperature is set as 200 DEG C.Every one section
Time takes out batten and measures its ultimate strength value, records the ultimate strength value of batten under different ageing times, former by measurement
When beginning sample fails, that is, ultimate strength value half when the high temperature ageing time, show that the aramid fabric of different ultimate strength values is remaining
High temperature ageing time standard data draw out the table of ultimate strength value and high temperature ageing time and remaining high temperature ageing time
Lattice.
1 standard batten ageing results of table
3, the aramid fabric batten for determining different ultimate strength value color difference analysis equations is prepared:
It is sampled from same aramid fabric, sample size is all the same, and length and width is respectively the standard aramid fiber face of 150mm × 50mm
Expect ultimate strength test bars.They are subjected to same high temperature ageing processing, respectively obtaining ultimate strength value is 1349N,
The sample of 960N, 700N, 655N, 675N, 650N, 599N, 553N, 545N.
4, aramid fabric chromatism test:
Each aramid fabric sample is scanned with color difference meter, color difference analysis is carried out to them, each sample is scanned 10 times, taken
The average value of value of chromatism.
2 aramid fabric value of chromatism of table
5, standard curve is drawn, founding mathematical models:
Software founding mathematical models are analyzed using OriginPro 9.1, aramid fabric sample value of chromatism is drawn out and it is disconnected
The standard curve for splitting strength value, calculates fit equation y=-240.77In (x)+1001.61 with Partial Least Squares, passes through meter
Color difference critical value is 3.88 when calculation obtains aramid fabric failure.
6, precision is verified:
In order to verify the degree of reliability of fit equation y=-240.77In (x)+1001.61,4 different breaking strengths are prepared
High temperature ageing after aramid fabric sample verified, measure the value of chromatism of aramid fabric sample, and calculated by fit equation
Color difference compares.
3 color difference true value of table and predicted value compare
According to the experimental results, for relative error within 8%, the fit equation degree of reliability is higher, substantially meets reality
Detect requirements of one's work.
7, the aramid fabric residue high temperature ageing time to be measured is measured:
Sample to be tested is scanned with color difference meter, after obtaining value of chromatism, compared colour difference's critical value 3.88 determines whether it fails, if
It does not fail, carries it into fit equation, and calculate its ultimate strength value, compare remaining high temperature ageing time and ultimate strength value
Relation table predicts the aramid fabric remaining life time.
Protection scope of the present invention is not limited to the above embodiments, it is clear that those skilled in the art can be to this hair
It is bright to carry out various changes and deformation without departing from scope and spirit of the present invention.If these changes and deformation belong to power of the present invention
In the range of benefit requirement and its equivalent technologies, then including the intent of the present invention also includes these changes and deforms.
Claims (8)
1. a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method, which comprises the steps of:
Step 1: preparing two groups of aramid fabric samples, the ultimate strength value of each aramid fabric sample in every group of sample is not
It is identical, wherein first group of aramid fabric sample is used to measure the ultimate strength value normal data under the different high temperature ageing times, the
Two groups of aramid fabric samples are for determining ultimate strength value color difference analysis equation；
Step 2: measuring the ultimate strength value of aramid fabric sample under first group of difference high temperature ageing time, and record high temperature
The relationship of ageing time and ultimate strength value determines the aramid fabric high temperature ageing time standard number of different ultimate strength values
According to, and the aramid fabric residue high temperature of different ultimate strength values is obtained by primary sample ultimate strength value half as stale value
Ageing time normal data；
Step 3: the measurement of chromaticity value is carried out to aramid fabric sample each in second group of sample using color difference meter, with original sample
Product compare calculating value of chromatism, draw standard curve according to value of chromatism and ultimate strength relationship, establish number with Partial Least Squares
Model is learned, fit equation is calculated, that is, determines ultimate strength value color difference analysis equation, can show that aramid fabric fails by equation
When color difference critical value；
Step 4: being measured in the aramid fabric residue high temperature ageing service life that survey is treated in outfield, scanned with color difference meter to be measured
Aramid fabric, compared colour difference's critical value determine whether it fails, if not failing, the value of chromatism of sample to be tested is substituted into ultimate strength
It is worth color difference analysis equation, calculates ultimate strength value, according to ultimate strength value calculated result, compare the virtue of different ultimate strength values
Synthetic fibre fabric residue high temperature ageing time standard data can calculate the aramid fabric residue high temperature ageing service life.
2. a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method as described in claim 1, feature exist
In: in the step 1 in two groups of aramid fabric samples each aramid fabric from same fabric sampling, sample size it is all the same.
3. a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method as described in claim 1, feature exist
In: the high temperature ageing time of two groups of aramid fabric samples corresponds in the step 1, i.e. sample in two groups of aramid fabric samples
Product ultimate strength value corresponds respectively.
4. a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method as described in claim 1, feature exist
In: the step 2 high temperature aging is carried out in constant temperature ageing oven, and constant temperature ageing oven temperature remains 200 DEG C.
5. a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method as described in claim 1, feature exist
In: the aramid fabric residue high temperature ageing life time of different ultimate strength values is dropped by ultimate strength value in the step 2
Low high temperature ageing time when being primary sample ultimate strength value half subtracts high temperature ageing time of sample and obtains.
6. a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method as described in claim 1, feature exist
In: primary sample refers to not aged primary sample in the step 3.
7. a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method as described in claim 1, feature exist
In: according to the relationship of sample value of chromatism and its ultimate strength value in the step 3, mathematics is established using Origin analysis software
Model draws out the standard curve of aramid fabric sample value of chromatism Yu its ultimate strength value, is calculated with Partial Least Squares quasi-
Close equation.
8. a kind of aramid fiber spy woven material high temperature ageing service life online nondestructive evaluation method as described in claim 1, feature exist
In: in the step 3 when aramid fabric ultimate strength value is reduced to the half of original broken strength value, aramid fabric failure.
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Cited By (4)
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| CN110836911A (en) * | 2019-11-10 | 2020-02-25 | 中国丝绸博物馆 | Method for nondestructive testing of aging degree of silk cultural relics based on surface resistance |
| CN111198207A (en) * | 2020-01-13 | 2020-05-26 | 中国丝绸博物馆 | Surface resistance evaluation method for aging degree of ancient textile cultural relics |
| CN111832182A (en) * | 2020-07-21 | 2020-10-27 | 南通大学 | Evaluation method for protective performance EBT value of modacrylic anti-arc fabric |
| CN112288258A (en) * | 2020-10-22 | 2021-01-29 | 南通大学 | Evaluation method of ATPV value of arc protection performance of aramid viscose fabric |
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| CN111832182B (en) * | 2020-07-21 | 2023-12-05 | 南通大学 | Evaluation method for EBT value of arc-proof performance of acrylic fiber fabric |
| CN112288258A (en) * | 2020-10-22 | 2021-01-29 | 南通大学 | Evaluation method of ATPV value of arc protection performance of aramid viscose fabric |
| CN112288258B (en) * | 2020-10-22 | 2024-04-09 | 南通大学 | Evaluation method for arc protection performance ATPV value of aramid viscose fabric |
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