CN208999214U - A kind of elasticity modulus and Poisson's ratio measuring device - Google Patents
A kind of elasticity modulus and Poisson's ratio measuring device Download PDFInfo
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- CN208999214U CN208999214U CN201821746937.3U CN201821746937U CN208999214U CN 208999214 U CN208999214 U CN 208999214U CN 201821746937 U CN201821746937 U CN 201821746937U CN 208999214 U CN208999214 U CN 208999214U
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Abstract
The utility model discloses a kind of elasticity modulus and Poisson's ratio measuring device, it include: to be disposed with test specimen loading mechanism to be measured on pier from the bottom up, the outer surface of test specimen to be measured is respectively fixed with fixed ring and lower fixed ring, multiple telescoping connection feeler levers are evenly arranged in lower fixed ring, length travel meter is fixed in upper fixed ring, the pointer of length travel meter is contacted with telescoping connection feeler lever；Annular stop ring is fixed with by horizon bar on telescoping connection feeler lever, annular stop ring is fixed with multiple lateral displacement meters, and the pointer of lateral displacement meter is directed toward surface of test piece to be measured.The device can measure the elasticity modulus and Poisson's ratio of test specimen to be measured simultaneously, by the way that multiple lateral displacement meters and multiple length travel meters is arranged, so that the acquisition range of vertical deformation and transversely deforming is more extensive, reduce error；Easy to operate without leveling again after lateral displacement meter and length travel meter are fixed, measurement accuracy is high, and can measure various sizes of test specimen to be measured.
Description
Technical field
The utility model relates to testing concrete performance fields, and in particular to a kind of elasticity modulus and Poisson's ratio measurement dress
It sets.
Background technique
Elasticity modulus is also known as Young's modulus, and most important, most feature the mechanical property of one kind of elastic material, is object bullet
Property deformation complexity characterization, indicated with E.The ratio between the stress that ideal material is defined as when having small deformation and corresponding strain.Pool
Than referring to material when unidirectional tension or in compression, the ratio of the absolute value of transverse normal strain and axial normal strain is also named laterally pine
Deformation coefficient, it is the elastic constant for reflecting material transversely deforming, is indicated with μ.The springform of the earth working materials such as concrete, the raw-soil
Amount and Poisson's ratio are the important mechanical characteristic indexs for reacting detected materials in flexible deformation, therefore accurately measure concrete etc.
The elasticity modulus and Poisson's ratio of earth working material suffer from important meaning for scientific research and Practical Project.Due to concrete, the raw-soil
It often very little and deforms very uneven Deng transversely deforming of the geotechnological class material under axial compressive force effect, leads to its deflection
Measurement is more difficult.And at present only survey prism bulk modulus or only survey prism Poisson's ratio device, when need simultaneously
, then can be comparatively laborious using these devices when measuring prism bulk modulus and Poisson's ratio, obtained data error is larger, due to
At present there has been no the device that can measure prism bulk modulus and Poisson's ratio simultaneously, the data that can refer to is also very limited, is
Solution above-mentioned technical problem, the present utility model device of this measurement prism bulk modulus and Poisson's ratio.
Utility model content
In order to solve the above problem, the utility model provides a kind of elasticity modulus and Poisson's ratio measuring device, which can be same
When measure the elasticity modulus and Poisson's ratio of test specimen to be measured, structure is simple, easy to operate, by the way that multiple lateral displacement meters and more are arranged
A length travel meter reduces the mistake of measurement so that the acquisition range of vertical deformation and the transversely deforming of test specimen to be measured is more extensive
Difference improves the precision of measurement；Lateral displacement meter and length travel meter are not necessarily to after being separately fixed at annular stop ring and upper fixed ring
It levels again, easy to operate, convenient and efficient, measurement accuracy is high, and can measure the elasticity modulus of various sizes of test specimen to be measured
And Poisson's ratio, measurement range are wider.
In order to achieve the above object, the utility model is resolved using following technical scheme.
A kind of elasticity modulus and Poisson's ratio measuring device, comprising: loading mechanism, lateral displacement meter, length travel meter and pier
Platform；Wherein, test specimen to be measured being fixed with by flexural pivot on the pier, the upper surface of the test specimen to be measured is provided with loading mechanism,
The loading mechanism is used to apply axial compressive force to the test specimen to be measured；The outer surface of the test specimen to be measured passes through holding screw point
It is not fixed with fixed ring and lower fixed ring, fixed ring is located at the top of the lower fixed ring, in the lower fixed ring
Multiple telescoping connection feeler levers are evenly arranged with, position corresponding with the telescoping connection feeler lever passes through fixed machine on fixed ring
Structure is fixed with length travel meter, the upper end face contact of the pointer of the length travel meter and the telescoping connection feeler lever；It is each described
Telescoping connection feeler lever is provided with the horizon bar perpendicular with the telescoping connection feeler lever, institute on the side wall far from the test specimen side to be measured
It states and is fixed with annular stop ring on horizon bar, the annular stop ring is uniformly fixed with multiple lateral displacement meters, each cross
Surface of test piece to be measured is directed toward to the pointer of displacement meter.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device, upper fixed ring are fixed by four holding screws
In the outer surface of test specimen to be measured, lower fixed ring is fixed on the outer surface of test specimen to be measured, upper fixed ring position by four holding screws
In the top of lower fixed ring.It is evenly distributed with multiple telescoping connection feeler levers in lower fixed ring, is consolidated in upper fixed ring by fixed mechanism
Surely there are multiple length travel meters, longitudinally in each the upper end face contact of the pointer of displacement meter and telescoping connection feeler lever, length travel meter is used
In the longitudinal deformation amount for measuring test specimen to be measured.Telescoping connection feeler lever is used to measure the elasticity modulus and pool of various sizes of test specimen to be measured
Loose ratio.Each telescoping connection feeler lever is provided with the horizon bar perpendicular with telescoping connection feeler lever on the side wall far from test specimen side to be measured,
It is fixed with annular stop ring on horizon bar, multiple fixation holes are uniformly distributed on annular stop ring, the pointer of lateral displacement meter passes through
Fixation hole is simultaneously fixed by screw, and the pointer of lateral displacement meter is directed toward surface of test piece to be measured, and lateral displacement meter is to be measured for measuring
The laterally flexible amount of test specimen；Meanwhile lateral displacement meter is fixedly connected by annular stop ring and horizon bar with telescoping connection feeler lever, it is horizontal
To displacement meter can moving and move up and down with telescoping connection feeler lever, in the elasticity modulus and pool to various sizes of test specimen to be measured
When pine is than being measured, after annular stop ring is fixed, without being leveled again to lateral displacement meter, the pointer of lateral displacement meter
Always the central area of surface of test piece to be measured can be directed at.Test specimen to be measured is fixed with by flexural pivot on pier, test specimen to be measured it is upper
End face is provided with loading mechanism, and loading mechanism is used to apply axial compressive force to test specimen to be measured, generates test specimen to be measured laterally and vertical
To deformation.
The elasticity modulus and Poisson's ratio measuring device of the utility model can measure the elasticity modulus and pool of test specimen to be measured simultaneously
Loose ratio, by the way that multiple lateral displacement meters and multiple length travel meters is arranged, so that the vertical deformation and transversely deforming of test specimen to be measured
Acquisition range it is more extensive, reduce the error of measurement, improve the precision of measurement；Lateral displacement meter and length travel meter are solid respectively
It is scheduled on after annular stop ring and upper fixed ring without leveling again, easy to operate, convenient and efficient, measurement accuracy is high, and can survey
The elasticity modulus and Poisson's ratio of various sizes of test specimen to be measured are measured, measurement range is wider.
Preferably, the telescoping connection feeler lever is electric pushrod.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device, flexible by electric pushrod can be to different rulers
The elasticity modulus and Poisson's ratio of very little test specimen to be measured are measured, and lateral displacement meter passes through annular stop ring and horizon bar and electricity
Dynamic push rod is fixedly connected, and lateral displacement meter can be moved up and down with the upper and lower flexible of electric pushrod, makes the pointer of lateral displacement meter
Always it is directed toward the centre of surface of test specimen to be measured, convenient and efficient without leveling to lateral displacement meter, measurement accuracy is high.
Preferably, the telescoping connection feeler lever includes the first telescopic rod, the second telescopic rod and third telescopic rod；Wherein, described
First telescopic rod sliding sleeve is in second telescopic rod, and first telescopic rod is close to one end of second telescopic rod
It is provided with protrusion on outer wall, is provided with fixation hole on one end side wall of first telescopic rod on second telescopic rod,
The protrusion matches with the fixation hole；The second telescopic rod sliding sleeve is in the third telescopic rod, and described second
Telescopic rod is provided with protrusion on the outer wall of one end of the third telescopic rod, close to described second on the third telescopic rod
Fixation hole is provided on one end side wall of telescopic rod, the protrusion matches with the fixation hole.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device, the first telescopic rod and the second telescopic rod pass through phase
Mutually matched protrusion and fixation hole are realized flexible and fixed, the second telescopic rod and third telescopic rod pass through the protrusion that is mutually matched with
Fixation hole is realized flexible and is fixed, therefore, right by the interaction energy of the first telescopic rod, the second telescopic rod and third telescopic rod
The elasticity modulus and Poisson's ratio of various sizes of test specimen to be measured are measured, and lateral displacement meter passes through annular stop ring and level
Bar is fixedly connected with the first telescopic rod, and lateral displacement meter can be moved up and down with the upper and lower flexible of the first telescopic rod, makes lateral position
The pointer for moving meter is directed toward the centre of surface of test specimen to be measured always, convenient and efficient without leveling to lateral displacement meter, measurement essence
Degree is high.
Preferably, cushion block is provided between the test specimen to be measured and the loading mechanism.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device are arranged between test specimen and loading mechanism to be measured
Cushion block is protected for treating test block when measuring.
Preferably, the test specimen to be measured is prism test specimen.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device, the bottom surface of prism test specimen are square, side
A length of 50~90mm is highly 150~300mm, so that lateral displacement meter is all directed at the center of prism test specimen, measurement accuracy is more
It is high.
Preferably, the fixed mechanism includes through-hole, positioning screw hole and positioning screw；It is stretched on fixed ring with described
The corresponding position of reducer coupling feeler lever is provided with through-hole, and the through-hole and the positioning screw hole are mutually axially vertically installed on described
In fixed ring, and the positioning screw hole is connected with the through-hole, and the positioning screw is assemblied in the positioning screw hole, described
The pointer of length travel meter protrudes into the through-hole, and is fixed on fixed ring by the positioning screw.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device, it is corresponding with telescoping connection feeler lever in upper fixed ring
Position be provided with mutually axially vertical through-hole and positioning screw hole, positioning screw hole is connected with through-hole, the finger of length travel meter
Needle protrudes into through-hole, and is fixed in upper fixed ring by positioning screw, makes the pointer of length travel meter and telescoping connection feeler lever
End face is in contact.
Preferably, the central point of the loading mechanism, cushion block, test specimen to be measured and flexural pivot is located on same axis.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device, loading mechanism, cushion block, test specimen to be measured and ball
The central point of hinge is located on same axis, it is ensured that and test specimen to be measured carries out accuracy when elasticity modulus and Poisson's ratio measurement,
Improve its measurement accuracy.
Preferably, fixed ring is lower than 5~10mm of upper surface of the test specimen to be measured；The lower fixed ring is higher than institute
State 5~10mm of lower surface of test specimen to be measured.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device, upper fixation are lower than the upper surface 5 of test specimen to be measured
~10mm, lower fixed ring are higher than 5~10mm of lower surface of test specimen to be measured, it is ensured that when test specimen to be measured measures, lateral position
It moves meter and length travel meter is always positioned at the surface of test specimen to be measured, guarantee the accuracy of measurement.
Preferably, fixed ring and the diameter of the lower fixed ring are respectively 15~18mm, the annular stop ring
Diameter be 20~25mm.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device, the diameter of annular stop ring are respectively greater than upper solid
The diameter for determining ring, lower fixed ring facilitates the fixation of lateral displacement meter.
Detailed description of the invention
The utility model is described in further details in the following with reference to the drawings and specific embodiments.
Fig. 1 is the elasticity modulus of the utility model and the structural schematic diagram of Poisson's ratio measuring device；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the elasticity modulus of the utility model and the load schematic diagram of Poisson's ratio measuring device, wherein 90s includes 60s
Hold lotus and 30s reading；60s is to hold lotus.
In the above figure: 1 loading mechanism；2 cushion blocks；3 test specimens to be measured；4 lateral displacement meters；5 length travel meters；It is fixed on 6
Ring；601 holding screws；7 lower fixed rings；8 telescoping connection feeler levers；9 horizon bars；10 annular stop rings；11 piers；12 flexural pivots.
Specific embodiment
With reference to Fig. 1-2, a kind of elasticity modulus and Poisson's ratio that the embodiment of content according to the present utility model is proposed are surveyed
Measure device, comprising: loading mechanism 1, lateral displacement meter 4, length travel meter 5 and pier 11；Wherein, pass through ball on the pier 11
Hinge 12 is fixed with test specimen 3 to be measured, and the upper surface of the test specimen 3 to be measured is provided with loading mechanism 1, the loading mechanism 1 be used for
The test specimen to be measured 3 applies axial compressive force；The outer surface of the test specimen to be measured 3 is respectively fixed with solid by holding screw 601
Determine ring 6 and lower fixed ring 7, fixed ring 6 is located at the top of the lower fixed ring 7, is uniformly arranged in the lower fixed ring 7
There are multiple telescoping connection feeler levers 8, position corresponding with the telescoping connection feeler lever 8 is solid by fixed mechanism on fixed ring 6
Surely there are length travel meter 5, the upper end face contact of the pointer of the length travel meter 5 and the telescoping connection feeler lever 8；It is stretched described in each
Reducer coupling feeler lever 8 is provided with the horizon bar 9 perpendicular with the telescoping connection feeler lever 8 on the side wall far from 3 side of test specimen to be measured,
Annular stop ring 10 is fixed on the horizon bar 9, the annular stop ring 10 is uniformly fixed with multiple lateral displacement meters 4, often
The pointer of a lateral displacement meter 4 is directed toward 3 surface of test specimen to be measured.
In the embodiment above, upper fixed ring 6 is fixed on the outer surface of test specimen 3 to be measured by four holding screws 601, under
Fixed ring 7 is fixed on the outer surface of test specimen 3 to be measured by four holding screws 601, and upper fixed ring 6 is located at the upper of lower fixed ring 7
Side.It is evenly distributed with multiple telescoping connection feeler levers 8 in lower fixed ring 7, multiple longitudinal directions is fixed with by fixed mechanism in upper fixed ring 6
Displacement meter 5, the upper end face contact of the pointer of displacement meter 5 and telescoping connection feeler lever 8 longitudinally in each, length travel meter 5 for measure to
The longitudinal deformation amount of test block 3.Telescoping connection feeler lever 8 is used to measure the elasticity modulus and Poisson's ratio of various sizes of test specimen to be measured 3.
Each telescoping connection feeler lever 8 is provided with the horizon bar 9 perpendicular with telescoping connection feeler lever 8, water on the side wall far from 3 side of test specimen to be measured
It is fixed with annular stop ring 10 on flat bar 9, multiple fixation holes, the pointer of lateral displacement meter 4 are uniformly distributed on annular stop ring 10
It is fixed across fixation hole and by screw, the pointer of lateral displacement meter 4 is directed toward 3 surface of test specimen to be measured, and lateral displacement meter 4 is for surveying
Measure the laterally flexible amount of test specimen 3 to be measured；Meanwhile lateral displacement meter 4 passes through annular stop ring 10 and horizon bar 9 and telescoping connection feeler lever
8 are fixedly connected, lateral displacement meter 4 can moving and move up and down with telescoping connection feeler lever 8, to various sizes of test specimen to be measured
When 3 elasticity modulus and Poisson's ratio are measured, after annular stop ring 10 is fixed, without being adjusted again to lateral displacement meter 4
Flat, the pointer of lateral displacement meter 4 can be directed at the central area on 3 surface of test specimen to be measured always.It is solid by flexural pivot 12 on pier 11
Surely need test block 3, the upper surface of test specimen 3 to be measured is provided with loading mechanism 1, and loading mechanism 1 is used to apply axis to test specimen 3 to be measured
To pressure, test specimen 3 to be measured is made to generate horizontal and vertical deformation.
With reference to Fig. 1-3, the elasticity modulus and the specific measurement method of Poisson's ratio measuring device of the utility model are as follows: by flexural pivot
12 water placing flat are lain in a horizontal plane on 12 support of flexural pivot on Dun platform, and by test specimen 3 to be measured, and test specimen 3 to be measured are put into upper solid
Determine in ring 6, lower fixed ring 7 and displacement meter stop collar, and be inserted vertically into length travel meter 5 in upper fixed ring 6, in circular fiber
It is horizontally inserted into lateral displacement meter 4 in ring, cushion block 2 is lain in a horizontal plane in the upper surface of test specimen 3 to be measured.By loading mechanism 1 to
Test block 3 applies vertical load, and carry out data acquisition by data collection system: load is controlled with power, with the load speed of 3kN/s
Degree is continuous and equably loading to initial compression is the initial load value F of 0.5MPa0, dead load 60s is kept, immediately with 3kN/s
The loading of loading velocity continuous uniform to 1/3 axle center the corresponding payload values F of compression strength fcpa, unloaded later with identical speed
Lotus is to initial load value F0, after repeating above step 3~5 times again loading to initial load value F0, keep dead load 60s and later
30s in record displacement meter reading, the corresponding payload values F of the compression strength fcp of continuous uniform loading immediately to 1/3 axle centera, protect
It holds dead load 60s and records displacement meter reading in 30s later, loading method schematic diagram is as shown in figure 3, the change that ought be surveyed above
When the ratio between the difference of shape value and their average values are greater than 20%, test is reformed after Ying Chongxin centering test block.Wherein, △ nZ、△nHRespectively
It is last time from F0It is loaded to FaWhen test specimen is vertical and the average value of transversely deforming, test specimen 3 to be measured is finally calculated as follows
Elastic modulus E and Poisson's ratio μ:
Elasticity modulus (E):Wherein,
In above formula, E --- elasticity modulus (MPa)；
Fa--- the load (kN) when the axial compressive strength that stress is 1/3 times；
F0--- the preliminary examination load (kN) when reverse cyclic loadings；
A --- the bearing area (mm of test specimen 3 to be measured2)；
The height (mm) of H --- test specimen 3 to be measured.
△nZ--- for the last time from F0It is loaded onto FaWhen 3 vertical deformation of test specimen to be measured average value (mm)；
——FaWhen 3 vertical deformation of test specimen to be measured average value (mm)；
——F0When 3 vertical deformation of test specimen to be measured average value (mm).
Poisson's ratio (μ):Wherein,
In above formula, △ nH--- for the last time from F0It is loaded into FaWhen 3 transversely deforming of test specimen to be measured average value (mm)；
——FaWhen 3 transversely deforming of test specimen to be measured average value (mm)；
——F0When 3 transversely deforming of test specimen to be measured average value (mm).
The elasticity modulus and Poisson's ratio measuring device of the utility model can measure the elasticity modulus and pool of test specimen 3 to be measured simultaneously
Loose ratio, by the way that multiple lateral displacement meters 4 and multiple length travel meters 5 is arranged, so that the vertical deformation of test specimen to be measured 3 and laterally change
The acquisition range of shape is more extensive, reduces the error of measurement, improves the precision of measurement；Lateral displacement meter 4 and length travel meter 5 divide
It is not fixed on after annular stop ring 10 and upper fixed ring 6 without leveling again, easy to operate, convenient and efficient, measurement accuracy is high, and
The elasticity modulus and Poisson's ratio of various sizes of test specimen to be measured 3 can be measured, measurement range is wider.
One embodiment according to the present utility model, the telescoping connection feeler lever 8 are electric pushrod.
In the embodiment above, by electric pushrod it is flexible can elasticity modulus to various sizes of test specimen 3 to be measured and
Poisson's ratio is measured, and lateral displacement meter 4 is fixedly connected by annular stop ring 10 and horizon bar 9 with electric pushrod, laterally
Displacement meter 4 can be moved up and down with the upper and lower flexible of electric pushrod, and the pointer of lateral displacement meter 4 is made to be directed toward test specimen 3 to be measured always
Centre of surface, convenient and efficient without leveling to lateral displacement meter 4, measurement accuracy is high.
One embodiment according to the present utility model, the telescoping connection feeler lever 8 include the first telescopic rod, the second telescopic rod and
Third telescopic rod；Wherein, the first telescopic rod sliding sleeve is in second telescopic rod, and first telescopic rod is close to institute
It states and is provided with protrusion on the outer wall of one end of the second telescopic rod, close to one end of first telescopic rod on second telescopic rod
Fixation hole is provided on side wall, the protrusion matches with the fixation hole；The second telescopic rod sliding sleeve is mounted in described the
In three telescopic rods, second telescopic rod is provided with protrusion, the third on the outer wall of one end of the third telescopic rod
Fixation hole, the protrusion and the fixation hole phase are provided on telescopic rod on one end side wall of second telescopic rod
Match.
In the embodiment above, the first telescopic rod and the second telescopic rod pass through the protrusion being mutually matched and fixation hole realization is stretched
It contracting and fixes, the second telescopic rod and third telescopic rod are stretched and are fixed by protrusion and the fixation hole realization being mutually matched, therefore,
It can be to the elasticity of various sizes of test specimen 3 to be measured by the interaction of the first telescopic rod, the second telescopic rod and third telescopic rod
Modulus and Poisson's ratio are measured, and lateral displacement meter 4 connects by the way that annular stop ring 10 and horizon bar 9 and the first telescopic rod are fixed
It connects, lateral displacement meter 4 can be moved up and down with the upper and lower flexible of the first telescopic rod, be directed toward the pointer of lateral displacement meter 4 always
The centre of surface of test specimen 3 to be measured, convenient and efficient without leveling to lateral displacement meter 4, measurement accuracy is high.
Preferably, cushion block 2 is provided between the test specimen to be measured 3 and the loading mechanism 1.
Elasticity modulus according to the present utility model and Poisson's ratio measuring device are arranged between test specimen 3 and loading mechanism 1 to be measured
Cushion block 2 for treating test block when measuring and being protected.
One embodiment according to the present utility model, the test specimen 3 to be measured are prism test specimen.
In the embodiment above, the bottom surface of prism test specimen is square, and side length is 50~90mm, highly for 150~
300mm, enables lateral displacement meter 4 to be directed at the center of prism test specimen, and measurement accuracy is higher.
With reference to Fig. 1, one embodiment according to the present utility model, the fixed mechanism includes through-hole, positioning screw hole and determines
Position screw；Position corresponding with the telescoping connection feeler lever 8 is provided with through-hole on fixed ring 6, the through-hole and described
Positioning screw hole is mutually axially vertically installed on fixed ring 6, and the positioning screw hole is connected with the through-hole, described
Positioning screw is assemblied in the positioning screw hole, and the pointer of the length travel meter 5 protrudes into the through-hole, and by described fixed
Position screw is fixed on fixed ring 6.
In the embodiment above, in upper fixed ring 6 position corresponding with telescoping connection feeler lever 8 be provided with it is mutually axially vertical
Through-hole and positioning screw hole, positioning screw hole is connected with through-hole, and the pointer of length travel meter 5 protrudes into through-hole, and passes through positioning
Screw is fixed in fixed ring 6, and the pointer of length travel meter 5 and the end face of telescoping connection feeler lever 8 is made to be in contact.
With reference to Fig. 1, one embodiment according to the present utility model, the loading mechanism 1, cushion block 2, test specimen to be measured 3 and ball
The central point of hinge 12 is located on same axis.
In the embodiment above, the central point of loading mechanism 1, cushion block 2, test specimen to be measured 3 and flexural pivot 12 is located at same axis
On, it is ensured that test specimen 3 to be measured carries out accuracy when elasticity modulus and Poisson's ratio measurement, improves its measurement accuracy.
With reference to Fig. 1, one embodiment according to the present utility model, the fixed upper table lower than the test specimen 3 to be measured
5~10mm of face；The lower fixed ring 7 is higher than 5~10mm of lower surface of the test specimen 3 to be measured.
In the embodiment above, upper fixed ring is lower than 5~10mm of upper surface of test specimen 3 to be measured, and lower fixed ring 7 is higher than to be measured
5~10mm of lower surface of test specimen 3, it is ensured that when test specimen 3 to be measured measures, lateral displacement meter 4 and length travel meter 5 are always
Positioned at the surface of test specimen 3 to be measured, guarantee the accuracy of measurement.
With reference to Fig. 1-2, one embodiment according to the present utility model, fixed ring 6 is straight with the lower fixed ring 7
Diameter is respectively 15~18mm, and the diameter of the annular stop ring 10 is 20~25mm.
In the embodiment above, the diameter of annular stop ring 10 is respectively greater than the diameter of upper fixed ring 6, lower fixed ring 7, side
Just the fixation of lateral displacement meter 4.
Obviously, it is practical without departing from this can to carry out various modification and variations to the utility model by those skilled in the art
Novel spirit and scope.If in this way, these modification and variations of the utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (9)
1. a kind of elasticity modulus and Poisson's ratio measuring device, comprising: loading mechanism (1), lateral displacement meter (4), length travel meter
(5) and pier (11)；Wherein, it is fixed with test specimen to be measured (3) on the pier (11) by flexural pivot (12), the test specimen to be measured
(3) upper surface is provided with loading mechanism (1), and the loading mechanism (1) is used to apply axial pressure to the test specimen (3) to be measured
Power；
The outer surface of the test specimen to be measured (3) is respectively fixed with fixed ring (6) and lower fixed ring by holding screw (601)
(7), fixed ring (6) is located at the top of the lower fixed ring (7), is evenly arranged on the lower fixed ring (7) multiple
Telescoping connection feeler lever (8), position corresponding with telescoping connection feeler lever (8) is solid by fixed mechanism on fixed ring (6)
Surely have length travel meter (5), the upper end face contact of the pointer of the length travel meter (5) and the telescoping connection feeler lever (8)；
It is provided on the side wall of separate test specimen (3) side to be measured of each telescoping connection feeler lever (8) and is contacted with described stretch
Bar (8) perpendicular horizon bar (9) is fixed with annular stop ring (10) on the horizon bar (9), the annular stop ring (10)
Multiple lateral displacement meters (4) are uniformly fixed with, the pointer of each lateral displacement meter (4) is directed toward test specimen (3) surface to be measured.
2. elasticity modulus according to claim 1 and Poisson's ratio measuring device, which is characterized in that the telescoping connection feeler lever
It (8) is electric pushrod.
3. elasticity modulus according to claim 1 and Poisson's ratio measuring device, which is characterized in that the telescoping connection feeler lever
It (8) include the first telescopic rod, the second telescopic rod and third telescopic rod；Wherein, the first telescopic rod sliding sleeve is mounted in described the
In two telescopic rods, first telescopic rod is provided with protrusion on the outer wall of one end of second telescopic rod, and described second
Fixation hole, the protrusion and the fixation hole phase are provided on telescopic rod on one end side wall of first telescopic rod
Match；The second telescopic rod sliding sleeve is in the third telescopic rod, and second telescopic rod is close to the third telescopic rod
One end outer wall on be provided with protrusion, be provided on one end side wall of second telescopic rod on the third telescopic rod
Fixation hole, the protrusion match with the fixation hole.
4. elasticity modulus according to claim 1 and Poisson's ratio measuring device, which is characterized in that the test specimen (3) to be measured
Cushion block (2) are provided between the loading mechanism (1).
5. elasticity modulus according to claim 1 and Poisson's ratio measuring device, which is characterized in that the test specimen (3) to be measured
For prism test specimen.
6. elasticity modulus according to claim 1 and Poisson's ratio measuring device, which is characterized in that the fixed mechanism includes
Through-hole, positioning screw hole and positioning screw；Position setting corresponding with telescoping connection feeler lever (8) on fixed ring (6)
There is through-hole, the through-hole and the positioning screw hole are mutually axially vertically installed on fixed ring (6), and the positioning spiral shell
Hole is connected with the through-hole, and the positioning screw is assemblied in the positioning screw hole, and the pointer of the length travel meter (5) is stretched
Enter in the through-hole, and is fixed on fixed ring (6) by the positioning screw.
7. elasticity modulus according to claim 1 and Poisson's ratio measuring device, which is characterized in that the loading mechanism (1),
The central point of cushion block (2), test specimen to be measured (3) and flexural pivot (12) is located on same axis.
8. elasticity modulus according to claim 1 and Poisson's ratio measuring device, which is characterized in that fixed ring (6)
Lower than 5~10mm of upper surface of the test specimen (3) to be measured；The lower fixed ring (7) is higher than the lower surface of the test specimen (3) to be measured
5~10mm.
9. elasticity modulus according to claim 1 and Poisson's ratio measuring device, which is characterized in that fixed ring (6)
Diameter with the lower fixed ring (7) is respectively 15~18mm, and the diameter of the annular stop ring (10) is 20~25mm.
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| CN201821746937.3U CN208999214U (en) | 2018-10-26 | 2018-10-26 | A kind of elasticity modulus and Poisson's ratio measuring device |
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| CN (1) | CN208999214U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567428A (en) * | 2019-09-12 | 2019-12-13 | 东北电力大学 | Frozen expansive soil body displacement detection device and installation method thereof |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567428A (en) * | 2019-09-12 | 2019-12-13 | 东北电力大学 | Frozen expansive soil body displacement detection device and installation method thereof |
| CN110567428B (en) * | 2019-09-12 | 2021-04-09 | 东北电力大学 | Frozen expansive soil body displacement detection device and installation method thereof |
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