CN101358929B - Experiment environment apparatus for expanding rate of fatigue crack in corrosive environment - Google Patents
Experiment environment apparatus for expanding rate of fatigue crack in corrosive environment Download PDFInfo
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- CN101358929B CN101358929B CN2008101670217A CN200810167021A CN101358929B CN 101358929 B CN101358929 B CN 101358929B CN 2008101670217 A CN2008101670217 A CN 2008101670217A CN 200810167021 A CN200810167021 A CN 200810167021A CN 101358929 B CN101358929 B CN 101358929B
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Abstract
The present invention relates to a growth rate testing environment device of fatigue crack in a corrosion environment, which consists of two groups of corrosion environment boxes. The device is characterized in that the two groups of corrosion environment boxes have symmetric shapes; a cavity is formed between the two groups of corrosion environment boxes and used for adding etching solution; the environment boxes are shaped like a wedge with a narrow front end and a wide rear end, respectively arranged on two sides of a sample, tightly clamped by a bolt through a front end installation hole and a rear end installation end, and provided with an etching solution input/output tube; the front ends of the environment boxes are arranged on the inner side of the loading hole of the sample. Compared with the prior art, the device has the following advantages: firstly, the structure is simple, and two components form an independent corrosion environment device; secondly, the device is provided with a position for a sample clamping strain gauge, so as to prevent the accurate measurement of the strain gauge from the influence of the corrosion medium.
Description
Technical field
The present invention is a kind of experiment environment apparatus for expanding rate of fatigue crack in corrosive environment, is used for expanding rate of fatigue crack in corrosive environment and tests C (T) sample that is installed, and belongs to the moulding and the technical field of structures of product.
Background technology
Standard compact tension specimen C (T) sample (being called for short C (T) sample) is the sample that extensively adopts in the test of metal material fatigue crack growth rate.C (T) sample is processed with draw-in groove in crack opening mouth position, and the clamping strain gauge is measured the opening displacement of crackle mouth automatically easily.Had the opening displacement of crackle mouth just can calculate the length of crackle according to flexibility method, test is vital for fatigue crack growth rate for this.
In the test of fatigue crack growth rate under corrosion environment, because sample is immersed in the corrosive medium, directly the clamping strain gauge can produce corrosion to strain gauge, and if corrosive medium also can the reaction sensitivity of strain gauge be exerted an influence for solution.Traditional test method generally adopts as describing in the GB/T6398-2000 appendix C, and sample directly is immersed in the solution, measures the length of crackle by the method for artificial visual measurement.
Summary of the invention
The present invention designs at the prior art situation just a kind of experiment environment apparatus for expanding rate of fatigue crack in corrosive environment is provided, its objective is that in the fatigue crack growth rate test that is implemented under the corrosion environment, C (T) sample need not directly be immersed in the solution and realize measuring.
The objective of the invention is to realize by following measure:
This kind experiment environment apparatus for expanding rate of fatigue crack in corrosive environment, it is to be made of two groups of corrosion environment boxes, it is characterized in that: two groups of corrosion environment box-like shape symmetries, middle cavity for the filling corrosive liquid, the environment box is the wide wedge shape in inswept rear end, is installed in the two sides of sample respectively, and adopts bolt to clamp by front end mounting hole and rear end mounting hole, the environment box is provided with corrosive liquid input/go out pipe, and environment box front end is in the inboard in the loading hole of sample.
After above-mentioned two groups of corrosion environment boxes fitted together, two corrosive liquids imported/go out the effect that pipe plays the corrosive medium input and output respectively, and the corrosion environment box is processed by organic glass.
Description of drawings
Fig. 1 is the structural representation of corrosion environment box of the present invention
Fig. 2 be among Fig. 1 A to cut-open view
Fig. 3 be among Fig. 1 B to cut-open view
Fig. 4 is that corrosion environment box of the present invention is installed on the mounting structure synoptic diagram on C (T) sample
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
Shown in accompanying drawing 1～4, this kind experiment environment apparatus for expanding rate of fatigue crack in corrosive environment, it is to be made of two groups of corrosion environment boxes, it is characterized in that: two groups of corrosion environment box 1 shape symmetries, middle cavity 7 for the filling corrosive liquid, environment box 1 is the wide wedge shape in inswept rear end, corrosion environment box 1 uses when mounted in pairs, be installed in the two sides of sample 5 respectively, one is installed in sample 5 front sides, one is installed in sample 5 rear sides, and adopt bolt by front end mounting hole 2 and rear end mounting hole 3 corrosion environment box 1 to be fixed on the sample to clamp, it is the corrosive medium input end that environment box 1 is provided with corrosive liquid input/go out pipe 4, one sides, opposite side is the corrosive medium output terminal, and environment box 1 front end is in the inboard in the loading hole 6 of sample 5.The strain gauge draw-in groove of C (T) the sample right side center section environment box that is not corroded surrounds, and draw-in groove is outside corrosive medium, and clamping strain gauge easily is to carry out the automatic measurement of crack mouth opening displacement.
The advantage that apparatus of the present invention compared with prior art have is:
1. simple in structure, two parts just can consist of a corrosive environment device that works alone;
2. reserved the part of sample holder strain gauge, made the accurate measurement of strain gauge avoid the impact of corrosive medium.
Claims (1)
1. experiment environment apparatus for expanding rate of fatigue crack in corrosive environment, it is to be made of two groups of corrosion environment boxes, it is characterized in that: this device is applicable to standard compact tension specimen CT sample, two groups of corrosion environment boxes (1) shape symmetry, middle cavity (7) for the filling corrosive liquid, environment box (1) is the wide wedge shape in inswept rear end, be installed in the two sides of sample (5) respectively, and adopt bolt to clamp by front end mounting hole (2) and rear end mounting hole (3), environment box (1) is provided with corrosive liquid input/go out pipe (4), and environment box (1) front end is in the inboard in the loading hole (6) of sample (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101670217A CN101358929B (en) | 2008-10-09 | 2008-10-09 | Experiment environment apparatus for expanding rate of fatigue crack in corrosive environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101670217A CN101358929B (en) | 2008-10-09 | 2008-10-09 | Experiment environment apparatus for expanding rate of fatigue crack in corrosive environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101358929A CN101358929A (en) | 2009-02-04 |
| CN101358929B true CN101358929B (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101670217A Active CN101358929B (en) | 2008-10-09 | 2008-10-09 | Experiment environment apparatus for expanding rate of fatigue crack in corrosive environment |
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| CN (1) | CN101358929B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175774A (en) * | 2013-02-28 | 2013-06-26 | 中国船舶重工集团公司第七二五研究所 | Corrosion test device for simulating environment alternation |
| CN106442292A (en) * | 2016-09-30 | 2017-02-22 | 北京航空航天大学 | Environmental simulation device for corrosion crack propagation performance testing |
| CN113125285B (en) * | 2021-03-19 | 2023-10-20 | 中国船舶重工集团公司第七二五研究所 | CCT sample corrosion fatigue crack growth rate test device |
| CN113218750A (en) * | 2021-06-01 | 2021-08-06 | 中南大学 | Method and device for measuring crack propagation speed of rock fracture |
-
2008
- 2008-10-09 CN CN2008101670217A patent/CN101358929B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 朱亦钢等.柔度方法测量中心裂纹试样的腐蚀疲劳裂纹扩展速率.《理化检验-物理分册》.2008,第44卷(第6期), * |
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| CN101358929A (en) | 2009-02-04 |
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Owner name: BEIJING INSTITUTE OF AERONAUTICAL MATERIALS, CHINA Free format text: FORMER NAME: BEIJING AVIATION MATERIAL INST., CHINA AVIATION INDUSTRY NO.1 GROUP CORP. |
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Address after: 100095 Beijing, box No. 81 Patentee after: Beijing Institute of Aeronautical Materials, China Aviation Industry Group Corporation Address before: 100095 Beijing, box No. 81 Patentee before: Beijing Institute of Aeronautical Materials, China Aviation Industry No.1 Group Corp. |