CN106769841A - Solid particulate matter mantle friction test device and method under a kind of vibrational excitation - Google Patents
Solid particulate matter mantle friction test device and method under a kind of vibrational excitation Download PDFInfo
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- CN106769841A CN106769841A CN201611079119.8A CN201611079119A CN106769841A CN 106769841 A CN106769841 A CN 106769841A CN 201611079119 A CN201611079119 A CN 201611079119A CN 106769841 A CN106769841 A CN 106769841A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The invention discloses solid particulate matter mantle friction test device and method under a kind of vibrational excitation, the device includes base, branch frame, radial pressure bringing device, radial pressure sensor, radial thrust bar, hopper, detection bar, vibrating device, slide, axial compressive force sensor and axial displacement bringing device, radial pressure bringing device applies pressure by radial thrust bar to solid particulate matter, axial displacement bringing device drives detection bar to be moved in hopper by slide, the frictional force of solid particulate matter and detection bar contact surface is understood by the numerical value for reading axial compressive force sensor.The present invention can apply different radial pressures by adjusting radial pressure bringing device, simultaneously different amplitude and vibration frequencies can also be set, the different types of solid particulate matter that can easily test under different vibration parameters when pressure is born with detection bar contact surface frictional behaviour.
Description
Technical field
The present invention relates to solid particulate matter mantle friction test device technical field, more particularly to a kind of vibrational excitation
Lower solid particulate matter mantle friction test device and method.
Background technology
Solid particulate matter is the complex system that a large amount of discrete solid particles interact and constitute, wide in nature
General presence, it has the form of solid and liquid concurrently and is not quite similar, therefore it has its unique complicated mechanical characteristic.Even if
It is that simplest dry nothing is adhered granular system and all shows extremely complex phenomenon and behavior.Individual particle in particulate matter
Gym suit from Newton's law, but in external force or internal stress changed condition, granular system can integrally produce flowing, performance
Go out the property of fluid, form particle stream.
Under vibrating conditions, the interaction force between particulate matter and border will be produced to the dynamic behaviour of particulate matter
Influence, from the point of view of tribology angle, the research for the load bearing grain material surface friction testing field under vibrational excitation does not have also
There are the instrument and method of maturation.
Therefore, from pressure-bearing particulate matter under the conditions of experiment angle quantitative measurment vibrational excitation to border rubbing action, for
There is the mechanical characteristic that particulate matter is disclosed from basic theory Important Academic to be worth, and in fields such as industry, agricultural, pharmacy
Application there are bright prospects.
The content of the invention
It is an object of the invention to provide solid particulate matter mantle friction test device and method under a kind of vibrational excitation, with
Above-mentioned prior art is solved the problems, such as, for the mechanical characteristic that particulate matter is disclosed from basic theory provides test equipment.
To achieve the above object, the invention provides following scheme：
The invention provides solid particulate matter mantle friction test device under a kind of vibrational excitation, including base, branch frame,
Radial pressure bringing device, radial pressure sensor, radial thrust bar, hopper, detection bar, vibrating device, slide, axial compressive force
Sensor and axial displacement bringing device.
One end of the base is installed with the hopper, is provided with groove in the hopper, the hopper top surface and bottom surface
Middle part is respectively equipped with first through hole and the second through hole, and the other end of the base is provided with axial displacement bringing device, the axial direction
Slide is provided between displacement bringing device and the hopper, is provided with described between the axial displacement bringing device and the slide
Axial compressive force sensor；The vibrating device is arranged on the slide, and the detection bar is rigidly connected with the vibrating device
It is integrated, detection bar and the first through hole and second via clearance run through the first through hole, described with merging
Groove and second through hole.
The hopper periphery is provided with the branch frame, and the radial pressure bringing device is even number, is symmetricly set on described
On branch frame, the radial pressure bringing device passes through radial thrust bar described in radial pressure sensor and described in and connects respectively
Connect, the end of each radial thrust bar is respectively positioned in the groove of the hopper and coordinates with the groove gap.
Preferably, one end of the base is provided with two side plates for being provided with draw-in groove, and the hopper includes hopper body and side
Baffle plate, the side shield sets reeded side and is connected by bolt and the hopper, and the first through hole is arranged on the material
On groove body, second through hole is arranged on the side shield, and the two ends of the hopper and the side shield are respectively embedded into institute
In stating draw-in groove.
Preferably, the groove is cruciform groove, and the radial pressure bringing device is four.
Preferably, also including experimental bench, the base and the branch frame are arranged on the testing stand.
Preferably, the end of the radial thrust bar is provided with column arc surface, and the column arc surface is applying radially to push away
It is concentric with the detection bar after power.
Preferably, plane and straight line needle bearing is provided between the slide and the base.
Preferably, the slide two ends are equipped with riser, and the riser near the hopper is provided with a through hole, the detection
One end of bar is provided with flange, and the detection bar passes through the through hole, the flange to be bolted on by a pressure ring described vertical
On plate, the flange both sides are equipped with cushion pad；Riser near the axial displacement bringing device is passed with the axis pressure
Sensor is connected.
Preferably, the vibrating device is produced using ultrasonic vibration, electric and magnetic oscillation, mechanical oscillation, air pressure or hydraulic vibration
Excitation or circumferential multi-point equispaced excitation in axial single point set, vibration frequency is 10~25kHz, and amplitude is 2~100 μm.
Preferably, the radial pressure bringing device and the axial displacement bringing device are hydraulic cylinder, pneumatic cylinder, electronics
Push rod or tapered wedges mechanism.
Present invention also offers solid particle under a kind of vibrational excitation using as any one of above-mentioned technical scheme
The method of the lower solid particulate matter skin-friction force of material surface friction testing arrangement test vibration excitation, comprises the following steps：
S1：To adding solid particulate matter in hopper；
S2：Radial pressure bringing device is opened, makes the synchronous symmetrical counterpressure for applying setting of radial pressure bringing device,
Solid particulate matter is pressed on detection bar periphery, and keep pressure constant, record the numerical value of radial pressure sensor；
S3：Vibrating device is opened, vibration is applied to detection bar；
S4：Axial displacement bringing device is opened, detection bar axial movement is promoted, the numerical value of axial compressive force sensor is recorded；
S5：After the displacement of detection bar reaches setpoint distance, stop recording radial pressure sensor axis are to pressure sensor
Numerical value, closes vibrating device, and radial pressure bringing device and axial displacement bringing device reset.
Preferably, step S1 includes removing on a radial thrust bar and radial pressure sensor of hopper, and detection bar is worn
Cross first through hole and the second through hole, its end is flushed with side cover plate outer wall, from the groove port of hopper to by hopper, side cover plate
Solid particulate matter to be measured is poured into the feed bin formed with remaining radial thrust bar, adds the volume of solid particulate matter to protect
Thickness after card solid particulate matter carrying is that the radius of 0.5~1 times of detection bar is defined；The radial thrust bar and radial direction that will be removed
Pressure sensor resets, and the initial dwell position and the spacing of detection bar for making all radial thrust bars are consistent.
The present invention achieves following technique effect relative to prior art：The present invention can be applied by adjusting radial pressure
Device applies different radial pressures, while different amplitude and vibration frequencies can also be set, can easily test difference and shake
The different types of solid particulate matter under parameter is moved when pressure is born and the frictional behaviour of bar contact surface is detected.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is solid particulate matter mantle friction test device structural representation under vibrational excitation of the present invention；
Fig. 2 is solid particulate matter mantle friction test device critical piece structural representation under vibrational excitation of the present invention；
Fig. 3 is the structural representation of radial pressure bringing device of the present invention, hopper, detection bar and solid particulate matter；
Fig. 4 is the structural representation of hopper body of the present invention；
Fig. 5 is vibrating device of the present invention and slide carriage structure schematic diagram；
Fig. 6 is the flow chart of the method for the lower solid particulate matter skin-friction force of test vibration excitation of the present invention；
Wherein, 1- detections bar, 2- side shields, 3- radial thrust bars, 4- radial pressure sensors, 5- hopper bodies, 6- is slided
Seat, 7- vibrating devices, 8- axial compressive force sensors, 9- axial displacement bringing devices, 10- bases, 11- solid particulate matters, 12-
Flange, 13- pressure rings, 14- radial pressure bringing devices, 15- branch frames, 16- testing stands.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is an object of the invention to provide solid particulate matter mantle friction test device and method under a kind of vibrational excitation, with
Above-mentioned prior art is solved the problems, such as, for the mechanical characteristic that particulate matter is disclosed from basic theory provides test equipment.
It is below in conjunction with the accompanying drawings and specific real to enable the above objects, features and advantages of the present invention more obvious understandable
The present invention is further detailed explanation to apply mode.
Embodiment 1：As Figure 1-5, the surface of solid particulate matter 11 is rubbed under present embodiments providing a kind of vibrational excitation
Wipe test device, including base 10, branch frame 15, radial pressure bringing device 14, radial pressure sensor 4, radial thrust bar 3,
Hopper, detection bar 1, vibrating device 7, slide 6, axial compressive force sensor 8 and axial displacement bringing device 9.
The base 10 and the branch frame 15 are arranged on the testing stand 16, with the fixed base 10 and the branch frame
15, it is relatively fixed the position of the two.One end of the base 10 is provided with two side plates for being provided with draw-in groove, and the hopper includes material
Groove body 5 and side shield 2, the side shield 2 set reeded side and are connected by bolt and the hopper, the hopper body
5 middle parts are provided with first through hole, and the middle part of the side shield 2 is provided with the second through hole, and the two of the hopper body 5 and the side shield 2
End is respectively embedded into the draw-in groove, and the bottom surface of the hopper body 5 and the draw-in groove are bolted to connection.The hopper sheet
Cruciform groove is provided with body 5, to facilitate radial thrust bar 3 to apply pressure in a balanced way to solid particle material；The branch frame 15
The hopper periphery is arranged on, the radial pressure bringing device 14 is four, is symmetricly set on the branch frame 15, the footpath
It is connected with radial thrust bar 3 described in by radial pressure sensor 4 described in respectively to pressure applying means 14, the radial direction
Pressure sensor 4 is used to determine the size of radial direction radial thrust, and the end of each radial thrust bar 3 is respectively positioned on the hopper
Cruciform groove in and with the groove gap coordinate, the gap should be less than the diameter of particle, to ensure during particle pressure-bearing
Do not leak and be defined；The end of the radial thrust bar 3 is provided with column arc surface, and the column arc surface applies to fill in radial pressure
Put 14 be applied with after radial thrust and the detection bar 1 with one heart, to ensure effect of the radial thrust bar 3 to solid particulate matter 11
The normal pressure that power is transferred to detect on bar 1 is circumferential uniform.
The other end of the base 10 is fixed with axial displacement bringing device 9, the axial displacement bringing device 9 and institute
State and be provided with slide 6 between hopper, plane and straight line needle bearing is provided between the slide 6 and the base 10, to reduce slide 6
Influence with the frictional force between base 10 to test result.The two ends of the slide 6 are equipped with riser, near the vertical of the hopper
Plate is provided with a through hole, and the detection bar 1 is rigidly connected with the vibrating device 7 and is integrated, and one end of the detection bar 1 is provided with
Flange 12, the detection bar 1 passes through the through hole, the flange 12 to be bolted on the riser by a pressure ring 13,
The both sides of the flange 12 are equipped with cushion pad, and cushion pad can prevent the vibration that vibrating device 7 is produced from being absorbed by slide 6；It is described
Detection bar 1 is matched somebody with somebody with the first through hole and second via clearance and is merged through the first through hole, the cruciform groove
And second through hole, the gap should be less than the diameter of particle, not leaked during ensureing particle pressure-bearing and be defined；Near the axle
It is connected with the axial displacement bringing device 9 by the axis pressure sensor to the riser of displacement bringing device 9.The axle
Frictional force between the numerical value as solid particulate matter 11 and detection bar 1 that are detected to pressure sensor 8.
It should be noted that：The vibrating device 7 can use ultrasonic vibration, electric and magnetic oscillation, mechanical oscillation, air pressure or liquid
Pressure vibration, it is every to produce excitation or circumferential multi-point equispaced excitation in axial single point set, make vibration frequency in 10~25kHz,
Amplitude is in 2~100 μm；The radial pressure bringing device 14 and the axial displacement bringing device 9 can be hydraulic pressure
Cylinder, pneumatic cylinder, electronics push rod or tapered wedges mechanism, it is every can stablize apply the size of active force and applying power, direction and when
Between can be controlled it is applicable.
The present embodiment additionally provides a kind of use as the surface of solid particulate matter 11 is rubbed under vibrational excitation in above-mentioned embodiment 1
The method for wiping the lower skin-friction force of solid particulate matter 11 of test device test vibration excitation, comprises the following steps：
S1：To solid particulate matter 11 is added in hopper, specially by a radial thrust bar 3 and radial pressure of hopper
Sensor 4 is removed, and detection bar 1 passes through first through hole and the second through hole, its end is flushed with side cover plate outer wall, by the recessed of hopper
To pouring into solid particulate matter 11 to be measured in the feed bin formed by hopper, side cover plate and remaining radial thrust bar 3 at notch, plus
Enter the volume of solid particulate matter 11 to ensure that the thickness after the carrying of solid particulate matter 11 is 0.5~1 times of radius of detection bar 1
It is defined；The radial thrust bar 3 and radial pressure sensor 4 of dismounting are resetted, makes the initial dwell position of all radial thrust bars 3
Spacing with detection bar 1 is consistent；
S2：Radial pressure bringing device 14 is opened, makes the synchronous symmetrical equilibrium for applying setting of radial pressure bringing device 14
Pressure, makes solid particulate matter 11 be pressed on the detection periphery of bar 1, and keeps pressure constant, record radial pressure sensor 4
Numerical value；
S3：Vibrating device 7 is opened, vibration is applied to detection bar 1；
S4：Axial displacement bringing device 9 is opened, promotes detection bar 1 to move axially, the number of record axial compressive force sensor 8
Value；
S5：After the displacement of detection bar 1 reaches setpoint distance, the axial compressive force sensor 8 of stop recording radial pressure sensor 4
Numerical value, close vibrating device 7, radial pressure bringing device 14 and axial displacement bringing device 9 reset.
The power of the numerical value and axial compressive force sensor 8 of radial pressure sensor 4 and the gained of axial displacement bringing device 9 with
Displacement data is acquired by acquisition system, finally transmits to computer and is analyzed treatment.
Solid particle of the solid particulate matter 11 by diameter in 0.2~0.8mm is constituted, and can be shot particle, pottery
Porcelain particle, SiC particulate, silica dioxide granule or natural fine sand etc..
The present embodiment can apply different radial pressures by adjusting radial pressure bringing device 14, while can also set
Different amplitudes and vibration frequency, the different types of solid particulate matter 11 that can easily test under different vibration parameters exist
With the frictional behaviour of the detection contact surface of bar 1 when bearing pressure.
The present embodiment can also determine particulate matter external friction power under the conditions of non-vibration, need to only not opened during test
Open vibrating device 7.Based on this, the present embodiment has the solid particulate matter under test non-vibration and applying vibration condition concurrently
11 frictional force, can realize paired observation vibration condition for solid particulate matter 11 and detection bar 1 it is cylindrical between frictional force
Influence.
Specifically, the design parameter and points for attention and type selecting of the present embodiment all parts in the design process are as follows：Visit
A diameter of 20mm of measuring staff 1, detection bar 1 passes through the first through hole and the second through hole on hopper and side cover plate and is that gap coordinates,
Gap is 0.1~0.2mm, it is ensured that particle does not leak, and makes the smooth operation in the axial direction of detection bar 1.
Inner chamber between the side cover plate and hopper body 5 of hopper forms symmetrical four uniform square grooves, and groove is side
The square column type of 22mm long, four radial thrust bars 3 are respectively arranged in four square grooves with gap cooperation, and unilateral gap is
0.05~0.1mm.The end of radial thrust bar 3 is the cylinder cambered surface coaxial with detection bar 1 with particle contact portion, and cambered surface radius are
15mm, so that it is circumferential uniform to ensure that footpath particulate matter is transferred to detect the normal pressure on bar 1.
Axial thrust bringing device uses electronics push rod, and is secured by bolts on base 10, and electronics push rod is to installation
Horizontal axis thrust is provided in the detection bar 1 on slide 6；Branch frame 15 is adopted with base 10 and is bolted on testing stand 16,
Guarantee test stable operation, radial pressure bringing device 14 uses hydraulic cylinder, and equipped with pressure feed system.
It is the stainless steel ball of 0.5mm that solid particulate matter 11 uses particle diameter, to the solid particulate matter 11 added in hopper
Volume be 9ml.Hydraulic cylinder applies the counterpressure of four direction simultaneously, and applying pressure is 3MPa, by solid particulate matter 11
Be pressed in detection bar 1 it is cylindrical on, form an internal diameter 20mm, external diameter 30mm or so, be highly the solid particulate matter circle of 22mm
Ring.The vibration frequency of vibrating device 7 uses 20kHz, and amplitude is 6 μm, and axial dither is applied to detection bar 1.Electronics push rod
Promote detection bar 1 to do horizontal axis with the speed of 5mm/s to move, whole test process moving displacement is 50mm.After test terminates,
Hydraulic cylinder and electronics push rod are resetted, to carry out the test of next different parameters condition.
Apply specific case in this specification to be set forth principle of the invention and implementation method, above example
Explanation be only intended to help and understand the method for the present invention and its core concept；Simultaneously for those of ordinary skill in the art,
According to thought of the invention, will change in specific embodiments and applications.In sum, in this specification
Appearance should not be construed as limiting the invention.
Claims (10)
1. solid particulate matter mantle friction test device under a kind of vibrational excitation, it is characterised in that：Including base, branch frame, footpath
Passed to pressure applying means, radial pressure sensor, radial thrust bar, hopper, detection bar, vibrating device, slide, axial compressive force
Sensor and axial displacement bringing device；
One end of the base is installed with the hopper, and the middle part of groove, the hopper top surface and bottom surface is provided with the hopper
First through hole and the second through hole are respectively equipped with, the other end of the base is provided with axial displacement bringing device, the axial displacement
Slide is provided between bringing device and the hopper, the axial direction is provided between the axial displacement bringing device and the slide
Pressure sensor；The vibrating device is arranged on the slide, and it is one that the detection bar is rigidly connected with the vibrating device
Body, the detection bar is matched somebody with somebody with the first through hole and second via clearance and is merged through the first through hole, the groove
With second through hole；
The hopper periphery is provided with the branch frame, and the radial pressure bringing device is even number, is symmetricly set on the branch frame
On, the radial pressure bringing device is connected by radial pressure sensor described in radial thrust bar described in respectively, often
The end of the individual radial thrust bar is respectively positioned in the groove of the hopper and coordinates with the groove gap.
2. solid particulate matter mantle friction test device under vibrational excitation according to claim 1, it is characterised in that：Institute
The one end for stating base is provided with two side plates for being provided with draw-in groove, and the hopper includes hopper body and side shield, and the side shield leads to
Cross bolt and set reeded side with the hopper and be connected, the first through hole is arranged on the hopper body, described second
Through hole is arranged on the side shield, and the two ends of the hopper body and the side shield are respectively embedded into the draw-in groove；It is described
Groove is preferably cruciform groove, and the radial pressure bringing device is four.
3. solid particulate matter mantle friction test device under vibrational excitation according to claim 2, it is characterised in that：Also
Including experimental bench, the base and the branch frame are arranged on the testing stand.
4. solid particulate matter mantle friction test device under vibrational excitation according to claim 1, it is characterised in that：Institute
The end for stating radial thrust bar is provided with column arc surface, and the column arc surface is after radial thrust is applied and the detection bar is same
The heart.
5. solid particulate matter mantle friction test device under vibrational excitation according to claim 1, it is characterised in that：Institute
State and plane and straight line needle bearing is provided between slide and the base.
6. solid particulate matter mantle friction test device under vibrational excitation according to claim 1, it is characterised in that：Institute
State slide two ends and be equipped with riser, the riser near the hopper is provided with a through hole, and one end of the detection bar is provided with flange,
The detection bar passes through the through hole, the flange to be bolted on the riser by a pressure ring, the flange both sides
It is equipped with cushion pad；Riser near the axial displacement bringing device is connected with the axis pressure sensor.
7. solid particulate matter mantle friction test device under vibrational excitation according to claim 1, it is characterised in that：Institute
State vibrating device using ultrasonic vibration, electric and magnetic oscillation, mechanical oscillation, air pressure or hydraulic vibration produce in axial single point set excitation or
Circumferential multi-point equispaced excitation, vibration frequency is 10~25kHz, and amplitude is 2~100 μm.
8. solid particulate matter mantle friction test device under vibrational excitation according to claim 1, it is characterised in that：Institute
It is hydraulic cylinder, pneumatic cylinder, electronics push rod or tapered wedges mechanism to state radial pressure bringing device and the axial displacement bringing device.
9. dress is tested in solid particulate matter mantle friction under a kind of vibrational excitation using as any one of claim 1-7
The method for putting the lower solid particulate matter skin-friction force of test vibration excitation, it is characterised in that：Comprise the following steps：
S1：To adding solid particulate matter in hopper；
S2：Radial pressure bringing device is opened, makes the synchronous symmetrical counterpressure for applying setting of radial pressure bringing device, made solid
Body particulate matter is pressed on detection bar periphery, and keeps pressure constant, records the numerical value of radial pressure sensor；
S3：Vibrating device is opened, vibration is applied to detection bar；
S4：Axial displacement bringing device is opened, detection bar axial movement is promoted, the numerical value of axial compressive force sensor is recorded；
S5：Detect bar displacement reach setpoint distance after, numerical value from stop recording radial pressure sensor axis to pressure sensor,
Vibrating device is closed, radial pressure bringing device and axial displacement bringing device reset.
10. the method that test vibration according to claim 8 encourages lower solid particulate matter skin-friction force, its feature exists
In：Step S1 includes removing on a radial thrust bar and radial pressure sensor of hopper, detection bar through first through hole and
Second through hole, makes its end be flushed with side cover plate outer wall, from the groove port of hopper to by hopper, side cover plate and remaining radially push away
Solid particulate matter to be measured is poured into the feed bin that power bar is formed, adds the volume of solid particulate matter to ensure solid particulate matter
Thickness after matter carrying is that the radius of 0.5~1 times of detection bar is defined；The radial thrust bar and radial pressure sensor of dismounting are answered
Position, the initial dwell position and the spacing of detection bar for making all radial thrust bars is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611079119.8A CN106769841B (en) | 2016-11-30 | 2016-11-30 | Solid particulate matter mantle friction test device and method under a kind of vibrational excitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611079119.8A CN106769841B (en) | 2016-11-30 | 2016-11-30 | Solid particulate matter mantle friction test device and method under a kind of vibrational excitation |
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| Publication Number | Publication Date |
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| CN106769841A true CN106769841A (en) | 2017-05-31 |
| CN106769841B CN106769841B (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092360A (en) * | 2021-03-30 | 2021-07-09 | 燕山大学 | Device and method for testing friction of arc-shaped surface under vibration condition |
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| CN2672642Y (en) * | 2004-01-05 | 2005-01-19 | 陕西华斯特仪器有限责任公司 | Detector for earth work synthetic material friction property |
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| CN101271056A (en) * | 2008-05-15 | 2008-09-24 | 上海交通大学 | Testing device for friction coefficient between underground pipe line and soil body |
| CN102207436A (en) * | 2010-07-26 | 2011-10-05 | 水利部交通运输部国家能源局南京水利科学研究院 | High performance direct shearing apparatus for large contact surfaces |
| CN102607966A (en) * | 2012-03-30 | 2012-07-25 | 王军 | Large contact surface characteristic direct shear apparatus with cycle loading function |
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| CN2672642Y (en) * | 2004-01-05 | 2005-01-19 | 陕西华斯特仪器有限责任公司 | Detector for earth work synthetic material friction property |
| CN201034922Y (en) * | 2006-12-29 | 2008-03-12 | 上海勘测设计研究院 | Sheet material boundary friction significance testing device |
| CN101271056A (en) * | 2008-05-15 | 2008-09-24 | 上海交通大学 | Testing device for friction coefficient between underground pipe line and soil body |
| CN102207436A (en) * | 2010-07-26 | 2011-10-05 | 水利部交通运输部国家能源局南京水利科学研究院 | High performance direct shearing apparatus for large contact surfaces |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092360A (en) * | 2021-03-30 | 2021-07-09 | 燕山大学 | Device and method for testing friction of arc-shaped surface under vibration condition |
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| Publication number | Publication date |
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| CN106769841B (en) | 2019-01-18 |
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