CN1804606A - Apparatus and method for measuring fatigue crack of coated material - Google Patents
Apparatus and method for measuring fatigue crack of coated material Download PDFInfo
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- CN1804606A CN1804606A CN 200510136756 CN200510136756A CN1804606A CN 1804606 A CN1804606 A CN 1804606A CN 200510136756 CN200510136756 CN 200510136756 CN 200510136756 A CN200510136756 A CN 200510136756A CN 1804606 A CN1804606 A CN 1804606A
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- bridge
- electric bridge
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- plated film
- resistance
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Abstract
The invention relates to a device and method for measuring coated film material fatigue crack in the field of measuring technology. It matches a bridge circuit on a normal tester, wherein the tested sample of the circuit is series connected with the bridge adjusting resistance; the bridge input end is connected with the power. The method comprises: it series connects the tested sample and the bridge adjusting resistance so that the voltage accretion can quote the crack comes in the coated film, it connects the bridge input end and the power and makes the adjust resistance output end to zero and levels the bridge, when the sample coated film comes the crack, the coated film resistance enlarges, the bridge lost its balance, it stops the test and records the test data.
Description
Technical field
The present invention relates to a kind of measuring technique, particularly relate at Coating Materials and carrying out in the torture test process, detect the facility and the measuring method thereof of plated film slight crack.
Background technology
In recent years, Coating Materials receives much concern with its unique physics, chemical characteristic.Along with Coating Materials self develops to functionalization, complicated and humbleization direction, at present, be widely used in commercial production and microelectromechanical systems field.Along with the development of technology, characterize and test the material behaviors such as mechanical property of Coating Materials, become the life-span of raising plated film product and the key factor of reliability.But because the singularity of Coating Materials preparation, traditional mechanics performance testing technology has run into difficulty and challenge in the test that is applied to Coating Materials.Wherein, in traditional tensile fatigue, sample fracture is that the test of a sample stops.The tradition sample fracture is a phenomenon very intuitively, and therefore, sample in the test is in case fracture, and test stops immediately, writes down test findings such as its fatigue lifetime.During the Coating Materials test, in a single day crackle appears in coatings, and promptly token test finishes, and the base-material of Coating Materials is an elastomer, and tensile fatigue is that the crackle on the plated film is very small in its elastic range in-draw, generally to amplify 500～600 times, could be seen by the naked eye.Therefore can't judge the fatigue lifetime of plated film sample with the technical method of routine.
Summary of the invention
The object of the present invention is to provide a kind of when Coating Materials is carried out torture test, detect facility and measuring method thereof that whether plated film crackle occurs, promptly in plated film specimen test process, measure at configuration one circuit facility on the conventional test machine.
The objective of the invention is to be achieved through the following technical solutions:
A kind of facility of measuring the Coating Materials fatigue crack, configuration one bridge diagram on the conventional test machine, sample to be tested is connected with adjustable resistance in the electric bridge in the circuit, and the electric bridge input end is connected on the steady power supply.
A kind of method of measuring the Coating Materials fatigue crack, this method comprises following process:
A. sample to be tested is connected with adjustable resistance in the electric bridge, voltage increases can be judged and occur crackle in the plated film;
B. the electric bridge input end is connected on the steady power supply, and regulating resistance, to make output end voltage be zero as far as possible, and electric bridge reaches balance, and when crackle moment appears in the plated film of sample, it is big that plated film resistance becomes, and the electric bridge out of trim is ended test immediately and write down test figure.
The invention has the beneficial effects as follows:
Guarantee that Coating Materials can accurately measure it and crackle when occur when torture test, accurately write down fatigue lifetime.
Description of drawings
Accompanying drawing of the present invention is for detecting the circuit theory diagrams of plated film slight crack facility.
Critical piece explanation among the figure:
(1) plated film sample (2) adjustable resistance R1
(3) measuring resistance R2, R3, R4 (4) electric bridge input end
(5) electric bridge output terminal (6) voltage meter
Specific embodiments
As shown in the figure, sample to be tested is connected with adjustable resistance R1 in the electric bridge, and according to the resistance of Coating Materials, its resistance is R=k
L/
A(k is a coefficient, for Cu film k=1.7 μ Ω cm, and the L specimen length, A: the plated film section) generalized case plated film resistance range is (0.6～100) Ω, the resistance of choice criteria resistance (3).The electric bridge input end is connected on the V volt steady power supply, and it is zero that adjusting R1 makes output end voltage as far as possible, and electric bridge reaches balance.Torture test begins, when crackle moment appears in the plated film of sample, it is big that plated film resistance becomes, the electric bridge out of trim, bridge output voltage no longer is zero, and promptly the voltage table pointer of electric bridge output terminal deflects, and can judge the plated film sample and crackle occur, end test immediately, write down test figures such as fatigue lifetime.
Since can't judge with the naked eye when crackle appears in the plated film sample in the torture test process, therefore, the characteristic when the present invention crackle occurs according to the plated film sample, promptly when crackle appearred in plated film, it is big that the resistance of plated film will become.Sample in the test is connected in series in the electric bridge, the variation of observation electric bridge output end voltage, according to R=U/I, when voltage changes, the resistance that must be plated film changes, only need the voltage table of observation electric bridge in the test, occur crackle in the plated film, the fatigue lifetime of in time writing down sample in case the voltage increase can be judged.
Claims (2)
1. a facility of measuring the Coating Materials fatigue crack is characterized in that configuration one bridge diagram on the conventional test machine, and sample to be tested is connected with adjustable resistance in the electric bridge in the circuit, and the electric bridge input end is connected on the steady power supply.
2. method of measuring the Coating Materials fatigue crack is characterized in that this method comprises following process:
A. sample to be tested is connected with adjustable resistance in the electric bridge, voltage increases can be judged and occur crackle in the plated film;
B. the electric bridge input end is connected on the steady power supply, and regulating resistance, to make output end voltage be zero as far as possible, and electric bridge reaches balance, and when crackle moment appears in the plated film of sample, it is big that plated film resistance becomes, and the electric bridge out of trim is ended test immediately and write down test figure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510136756 CN1804606A (en) | 2005-12-29 | 2005-12-29 | Apparatus and method for measuring fatigue crack of coated material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510136756 CN1804606A (en) | 2005-12-29 | 2005-12-29 | Apparatus and method for measuring fatigue crack of coated material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1804606A true CN1804606A (en) | 2006-07-19 |
Family
ID=36866696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510136756 Pending CN1804606A (en) | 2005-12-29 | 2005-12-29 | Apparatus and method for measuring fatigue crack of coated material |
Country Status (1)
| Country | Link |
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| CN (1) | CN1804606A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226163B (en) * | 2008-01-22 | 2010-11-10 | 西安交通大学 | Method for measuring metallic film fatigue life on a flexible substrate |
| CN105510392A (en) * | 2015-11-29 | 2016-04-20 | 中国人民解放军装甲兵工程学院 | Micro-resistor based waste and old engine valve nondestructive test method |
| CN106124566A (en) * | 2016-06-20 | 2016-11-16 | 南京航空航天大学 | The damage of rail joint clamping plate fatigue crack and extension on-line monitoring assembly and method of work thereof |
-
2005
- 2005-12-29 CN CN 200510136756 patent/CN1804606A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226163B (en) * | 2008-01-22 | 2010-11-10 | 西安交通大学 | Method for measuring metallic film fatigue life on a flexible substrate |
| CN105510392A (en) * | 2015-11-29 | 2016-04-20 | 中国人民解放军装甲兵工程学院 | Micro-resistor based waste and old engine valve nondestructive test method |
| CN105510392B (en) * | 2015-11-29 | 2018-06-12 | 中国人民解放军装甲兵工程学院 | A kind of end-of-life engine valve lossless detection method based on micro resistance |
| CN106124566A (en) * | 2016-06-20 | 2016-11-16 | 南京航空航天大学 | The damage of rail joint clamping plate fatigue crack and extension on-line monitoring assembly and method of work thereof |
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