CN105486273A - Circular-ring-type biaxial radial extensometer in hydrostatic pressure multi-axis loading test - Google Patents
Circular-ring-type biaxial radial extensometer in hydrostatic pressure multi-axis loading test Download PDFInfo
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- CN105486273A CN105486273A CN201510847245.2A CN201510847245A CN105486273A CN 105486273 A CN105486273 A CN 105486273A CN 201510847245 A CN201510847245 A CN 201510847245A CN 105486273 A CN105486273 A CN 105486273A
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- flexible member
- strainometer
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- test specimen
- extensometer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Provided is a circular-ring-type biaxial radial extensometer in a hydrostatic pressure multi-axis loading test. Four elastic components are rigidly connected on a fixation ring; each elastic component is arranged around a test piece in a 1/4 circular arc shape manner; each elastic component is connected with the test piece through one connection rod; the connection rods are tightly arranged between the elastic components and the test piece; the upper and lower surfaces of the top portion of each elastic component are respectively attached by two strainmeters; and the four strainmeters form a Wheatstone full bridge. Radial deformation of the test piece is transferred to the elastic components through the connection rods to enable the elastic components to bend; the strainmeters measure strain of the elastic components; and test piece deformation can be calculated by measuring the output of Wheatstone full bridge. The extensometer is suitable for radial deformation and strain measurement in the hydrostatic pressure multi-axis loading test under a high hydraulic pressure environment, so that the blank of strain measurement technology under the high hydraulic pressure environment is filled; and the extensometer has better linearity and sensitivity, and meanwhile, has smaller size, thereby saving space for a narrow and small test chamber in the hydrostatic pressure multi-axis loading test.
Description
Technical field
The present invention relates to a kind of radial strain extensometer, be specifically related to the circular ring type double-shaft radial extensometer in the test of a kind of hydrostatic pressing Multi-axial Loading.
Background technology
Extensometer is widely used in measuring test piece deformation in material properties test and mechanical test, and existing Strain Extensometer majority is longitudinal extensometer or single shaft extensometer, and uses under being all limited to atmospheric pressure environment.In the test of hydrostatic pressing Multi-axial Loading, LOADED CAVITY indoor are under 100MPa high hydraulic environment, the narrow space in chamber, and under still not having one to can be used for high hydraulic environment at present, size is less, the twin shaft extensometer of measurement test specimen radial deformation.
Summary of the invention
The object of the invention is to the blank filling up above-mentioned measuring technique, a kind of circular ring type double-shaft radial extensometer that can be used for the measurement of test specimen radial deformation and strain measurement in the test of hydrostatic pressing Multi-axial Loading is provided, compared with traditional cantilever beam structure extensometer, while satisfied measurement requires, there is less bulk.
For achieving the above object, the technical solution adopted in the present invention is:
Circular ring type double-shaft radial extensometer in the test of hydrostatic pressing Multi-axial Loading, comprise set collar 1, test specimen 7 in the test of hydrostatic pressing Multi-axial Loading is placed in set collar 1, first flexible member 2, second flexible member 3, the 3rd flexible member 4 and the 4th flexible member 5 one end are fixed in set collar 1, the other end contacts with connecting link 6, connecting link 6 withstanding between flexible member and test specimen 7 tightly, and connecting link 6 is perpendicularly in contact with test specimen 7 surface; Described first flexible member 2 upper surface posts the first upper surface strainometer 8 and the second upper surface strainometer 9, and lower surface posts the first lower surface strainometer 10 and the second lower surface strainometer 11, four stress gauges composition Hui Sitong full-bridge; Described second flexible member 3, the 3rd flexible member 4 are identical with the first flexible member 2 with the structure of the 4th flexible member 5, and four flexible members present annular generally, and namely each flexible member is that 1/4 circular arc is centered around around test specimen 7; First flexible member 2 and the 3rd flexible member 4 synthesize one group, by the distortion on the strainometer measurement radial y direction of test specimen 7 and strain, second flexible member 3 and the 4th flexible member 5 synthesize one group, by the distortion on the strainometer measurement radial x direction of test specimen 7 and strain;
First upper surface strainometer 8 of described first flexible member 2 and the lead end 8+ of the second upper surface strainometer 9, 8-, 9+, 9-receives a of the first connection terminal 12 successively, b, c, on d end, first lower surface strainometer 10 of the first flexible member 2 and the lead end 10+ of the second lower surface strainometer 11, 10-, 11+, 11-receives the e of the second connection terminal 13 successively, f, g, on h end, the 10-end of the 8-termination first lower surface strainometer 10 of the first upper surface strainometer 8, the 9+ end of the 10+ termination first upper surface strainometer 9 of the first lower surface strainometer 10, the 11+ end of the 9-termination second lower surface strainometer 11 of the second upper surface strainometer 9, the 8+ end of the 11-termination first upper surface strainometer 8 of the second lower surface strainometer 11, the a end of the first connection terminal 12 is that the first flexible member 2 upper surface place Wheatstone bridge is powered positive pole, and c end is for electric bridge is for negative pole, and b end is bridge output signal positive pole, and d end is bridge output signal negative pole, the e end of the second connection terminal 13 to be powered positive pole for flexible member lower surface place Wheatstone bridge, and g end is for electric bridge is for negative pole, and f end is bridge output signal positive pole, and h end is bridge output signal negative pole.
Compared to the prior art comparatively, the present invention possesses following advantage:
1) extensometer designed by the present invention to have elastic component be the Curved Beam Structure of 1/4 circular shape, and four flexible members for radial measurement are circular layout, make the distortion on two relative some directions of flexible member combined measurement test specimen or strain, compared with the extensometer of traditional cantilever beam structure, while there is the good linearity and sensitivity, there is less volume, save the space in hydrostatic pressing Multi-axial Loading test chamber.
2) extensometer designed by the present invention does not need to be bound on test specimen by extensometer by other element as conventional extensometer, but is connected with test specimen tightly by extensometer by a connecting link, convenient and reliable operation.
3) upper and lower surface of the flexible member afterbody designed by the present invention posts two panels strainometer respectively, composition Hui Sidun full-bridge can eliminate measuring error that temperature causes and the strainometer pressure effect error that hydrostatic pressing environment causes, and adds the output sensitivity of extensometer simultaneously.Extensometer designed by the present invention can measure three shaft distortions and strain;
4) the present invention is applicable to twin shaft distortion under the high hydrostatic pressure environment being greater than 110MPa and strain measurement, test specimen radial deformation measurement sensistivity is 1098 μ ε/mm (X-axis) and 1087 μ ε/mm (Y-axis), there is light structure, easy to use, sensitivity high.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Fig. 2 is the structure principle chart of flexible member of the present invention.
Fig. 3 is spring leaf strainometer paster schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
With reference to the circular ring type double-shaft radial extensometer in Fig. 1, Fig. 2, hydrostatic pressing Multi-axial Loading of the present invention test, comprise set collar 1, test specimen 7 in the test of hydrostatic pressing Multi-axial Loading is placed in set collar 1, first flexible member 2, second flexible member 3, the 3rd flexible member 4 and the 4th flexible member 5 one end are fixed in set collar 1, the other end contacts with connecting link 6, connecting link 6 withstanding between flexible member and test specimen 7 tightly, and connecting link 6 is perpendicularly in contact with test specimen 7 surface; Described first flexible member 2 upper surface posts the first upper surface strainometer 8 and the second upper surface strainometer 9, and lower surface posts the first lower surface strainometer 10 and the second lower surface strainometer 11, four stress gauges composition Hui Sitong full-bridge; Described second flexible member 3, the 3rd flexible member 4 are identical with the first flexible member 2 with the structure of the 4th flexible member 5, and four flexible members present annular generally, and namely each flexible member is that 1/4 circular arc is centered around around test specimen 7; First flexible member 2 and the 3rd flexible member 4 synthesize one group, by the distortion on the strainometer measurement radial y direction of test specimen 7 and strain, second flexible member 3 and the 4th flexible member 5 synthesize one group, by the distortion on the strainometer measurement radial x direction of test specimen 7 and strain.
With reference to Fig. 3, first upper surface strainometer 8 of the first flexible member 2 and the lead end 8+ of the second upper surface strainometer 9, 8-, 9+, 9-receives a of the first connection terminal 12 successively, b, c, on d end, first lower surface strainometer 10 of the first flexible member 2 and the lead end 10+ of the second lower surface strainometer 11, 10-, 11+, 11-receives the e of the second connection terminal 13 successively, f, g, on h end, the 10-end of the 8-termination first lower surface strainometer 10 of the first upper surface strainometer 8, the 9+ end of the 10+ termination first upper surface strainometer 9 of the first lower surface strainometer 10, the 11+ end of the 9-termination second lower surface strainometer 11 of the second upper surface strainometer 9, the 8+ end of the 11-termination first upper surface strainometer 8 of the second lower surface strainometer 11, the a end of the first connection terminal 12 is that the first flexible member 2 upper surface place Wheatstone bridge is powered positive pole, and c end is for electric bridge is for negative pole, and b end is bridge output signal positive pole, and d end is bridge output signal negative pole, the e end of the second connection terminal 13 to be powered positive pole for flexible member lower surface place Wheatstone bridge, and g end is for electric bridge is for negative pole, and f end is bridge output signal positive pole, and h end is bridge output signal negative pole.
Principle of work of the present invention is: be fixed on set collar 1 by first flexible member 2 one end, the other end is connected with test specimen 7 by connecting link 6.Before the start of the measurement, first connecting link 6 is backed down gently the first flexible member 2 end a bit of, make the first flexible member 2 end produce small precompression to connecting link 6, ensure that connecting link 6 tightly can be attached to test specimen 7 surface.When diameter increases test specimen 7 because of distortion, pass to the first flexible member 2 by connecting link 6 and make it open, thus produce corresponding strain at flexible member strainometer paster place.The strain of the first flexible member 2 upper surface measured by first upper surface strainometer 8 and the second upper surface strainometer 9, the strain at the first flexible member 2 lower surface place measured by first lower surface strainometer 10 and the second lower surface strainometer 11, four strainometer composition Hui Sitong full-bridges, export can calculate test piece deformation by measuring Hui Sitong full-bridge.First flexible member 2 and the 3rd flexible member 4 synthesize one group, the addition of its Output rusults can be calculated the distortion on the radial y direction of test specimen and strain.Second flexible member 3 and the 4th flexible member 5 synthesize one group, the addition of its Output rusults can be calculated the distortion on the radial x direction of test specimen and strain.
Claims (1)
1. the circular ring type double-shaft radial extensometer in the test of hydrostatic pressing Multi-axial Loading, it is characterized in that: comprise set collar (1), test specimen (7) in the test of hydrostatic pressing Multi-axial Loading is placed in set collar (1), first flexible member (2), second flexible member (3), 3rd flexible member (4) and the 4th flexible member (5) one end are fixed in set collar (1), the other end contacts with connecting link (6), connecting link (6) tightly withstand between flexible member and test specimen (7), and connecting link (6) is perpendicularly in contact with test specimen (7) surface, described first flexible member (2) upper surface posts the first upper surface strainometer (8) and the second upper surface strainometer (9), lower surface posts the first lower surface strainometer (10) and the second lower surface strainometer (11), four stress gauges composition Hui Sitong full-bridge, described second flexible member (3), the 3rd flexible member (4) are identical with the first flexible member (2) with the structure of the 4th flexible member (5), four flexible members present annular generally, and namely each flexible member is that 1/4 circular arc is centered around test specimen (7) around, first flexible member (2) and the 3rd flexible member (4) synthesize one group, distortion on the radial y direction of test specimen (7) and strain is measured by strainometer, second flexible member (3) and the 4th flexible member (5) synthesize one group, measure distortion on the radial x direction of test specimen (7) and strain by strainometer,
First upper surface strainometer (8) of described first flexible member (2) and the lead end 8+ of the second upper surface strainometer (9), 8-, 9+, 9-receives a of the first connection terminal (12) successively, b, c, on d end, first lower surface strainometer (10) of the first flexible member (2) and the lead end 10+ of the second lower surface strainometer (11), 10-, 11+, 11-receives the e of the second connection terminal (13) successively, f, g, on h end, the 10-end of 8-termination first lower surface strainometer (10) of the first upper surface strainometer (8), the 9+ end of 10+ termination first upper surface strainometer (9) of the first lower surface strainometer (10), the 11+ end of 9-termination second lower surface strainometer (11) of the second upper surface strainometer (9), the 8+ end of 11-termination first upper surface strainometer (8) of the second lower surface strainometer (11), the a end of the first connection terminal (12) is that the first flexible member (2) upper surface place Wheatstone bridge is powered positive pole, and c end is for electric bridge is for negative pole, and b end is bridge output signal positive pole, and d end is bridge output signal negative pole, the e end of the second connection terminal (13) to be powered positive pole for flexible member lower surface place Wheatstone bridge, and g end is for electric bridge is for negative pole, and f end is bridge output signal positive pole, and h end is bridge output signal negative pole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510847245.2A CN105486273A (en) | 2015-11-27 | 2015-11-27 | Circular-ring-type biaxial radial extensometer in hydrostatic pressure multi-axis loading test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510847245.2A CN105486273A (en) | 2015-11-27 | 2015-11-27 | Circular-ring-type biaxial radial extensometer in hydrostatic pressure multi-axis loading test |
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| CN105486273A true CN105486273A (en) | 2016-04-13 |
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| CN201510847245.2A Pending CN105486273A (en) | 2015-11-27 | 2015-11-27 | Circular-ring-type biaxial radial extensometer in hydrostatic pressure multi-axis loading test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500652A (en) * | 2016-11-14 | 2017-03-15 | 河海大学 | A kind of servo-actuated Multi-point contact type hoop strain measurement apparatus |
| CN110082011A (en) * | 2019-04-08 | 2019-08-02 | 太原理工大学 | A kind of multistage dynamometry location displacement sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020055608A (en) * | 2000-12-29 | 2002-07-10 | 김형국 | Measured stress method with strain guage |
| CN101413782A (en) * | 2008-12-04 | 2009-04-22 | 西安交通大学 | Double-shaft radial extensometer under high hydraulic environment |
| CN101446531A (en) * | 2008-12-30 | 2009-06-03 | 西安交通大学 | Multi-axis hydrostatic test device of porous material |
| CN102589409A (en) * | 2012-03-02 | 2012-07-18 | 西安交通大学 | Three-axis extensometer under high hydrostatic pressure environment |
| CN203405379U (en) * | 2013-08-09 | 2014-01-22 | 金陵科技学院 | Extensometer fixing device with adjustable scale distance in overall process of axial pulling and pressing |
-
2015
- 2015-11-27 CN CN201510847245.2A patent/CN105486273A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020055608A (en) * | 2000-12-29 | 2002-07-10 | 김형국 | Measured stress method with strain guage |
| CN101413782A (en) * | 2008-12-04 | 2009-04-22 | 西安交通大学 | Double-shaft radial extensometer under high hydraulic environment |
| CN101446531A (en) * | 2008-12-30 | 2009-06-03 | 西安交通大学 | Multi-axis hydrostatic test device of porous material |
| CN102589409A (en) * | 2012-03-02 | 2012-07-18 | 西安交通大学 | Three-axis extensometer under high hydrostatic pressure environment |
| CN203405379U (en) * | 2013-08-09 | 2014-01-22 | 金陵科技学院 | Extensometer fixing device with adjustable scale distance in overall process of axial pulling and pressing |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500652A (en) * | 2016-11-14 | 2017-03-15 | 河海大学 | A kind of servo-actuated Multi-point contact type hoop strain measurement apparatus |
| CN106500652B (en) * | 2016-11-14 | 2019-08-06 | 河海大学 | A kind of servo-actuated Multi-point contact type hoop strain measuring device |
| CN110082011A (en) * | 2019-04-08 | 2019-08-02 | 太原理工大学 | A kind of multistage dynamometry location displacement sensor |
| CN110082011B (en) * | 2019-04-08 | 2021-03-05 | 太原理工大学 | Multi-stage force and displacement measuring sensor |
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Application publication date: 20160413 |
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