CN109632479A - A kind of true triaxial dynamic pressure testing machine and test method - Google Patents
A kind of true triaxial dynamic pressure testing machine and test method Download PDFInfo
- Publication number
- CN109632479A CN109632479A CN201811530349.0A CN201811530349A CN109632479A CN 109632479 A CN109632479 A CN 109632479A CN 201811530349 A CN201811530349 A CN 201811530349A CN 109632479 A CN109632479 A CN 109632479A
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- China
- Prior art keywords
- pressure sensor
- application system
- lateral
- load application
- machine frame
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
Abstract
A kind of true triaxial dynamic pressure testing machine and test method, provide axial load, can also provide different confining pressures, and compression can be applied, can also apply tensile stress, apply and compression and tensile stress can independent control, and the region for applying load is controllable.The testing machine, including testing machine frame, load application system is equipped in test machine frame peripheral hardware, load application system is applied in test machine frame on test specimen by load transfer system, the load application system includes axial load application system and lateral load application system, top pressure sensor is provided at the top of sample, the surrounding of sample is provided with lateral pressure sensor, top pressure sensor and lateral pressure sensor are connect with controller, and axial load application system and lateral load application system are connect with controller.The present invention can apply pulling force and pressure different on 5 directions, realize real true triaxial, and pressure and the size of pulling force are variable, size can control.It can change the area size for applying load, so as to apply load to specific region.
Description
Technical field
The invention belongs to ground work and experimental technique fields, relate in particular to a kind of dynamic pressure test dress of true triaxial
It sets, further relates to true triaxial dynamic pressure test method.
Background technique
Geotechnical engineering test field must require to apply confining pressure other than applying axis pressure when doing ground experiment, and confining pressure exists
It is also unequal on different directions, and must require to apply tensile stress in addition to applying compression sometimes, many experimental provisions can only
Apply axial compressive force, confining pressure cannot be applied, even if applying confining pressure, the confining pressure of application is also equal.And many experimental rigs
Compression can only be applied, tensile stress cannot be applied.Load cannot be applied to specified region, cannot change and apply the big of load region
It is small.The different devices and mechanism of the present invention meets these requirements simultaneously.
Current many experimental provisions cannot apply the pulling force of alternating load, can only apply pressure, current many experimental provisions
It is applied with axis pressure and confining pressure, but identical confining pressure can only be applied, pressure and pulling force different on different directions cannot be applied.No
Load can be applied to specified region, the size for applying load region cannot be changed.
Summary of the invention
The present invention provides a kind of true triaxial dynamic pressure testing machine and test method, provides axial load, can also provide
Different confining pressures, and compression can be applied, tensile stress can also be applied, applying can independently control with compression and tensile stress
System, and the region for applying load is controllable.
The object of the present invention is achieved in the following manner:
A kind of true triaxial dynamic pressure testing machine, including test machine frame are equipped with load application system in test machine frame peripheral hardware,
Load application system is applied in test machine frame on test specimen by load transfer system, and the load application system includes axial
Load application system and lateral load application system, sample top are provided with top pressure sensor, and the surrounding of sample is provided with
Lateral pressure sensor, top pressure sensor and lateral pressure sensor are connect with controller, axial load application system
It is connect with controller with lateral load application system.
Above-mentioned true triaxial dynamic pressure testing machine, axial load application system include the electricity being arranged in outside test machine frame
Machine is provided with the first bevel gear on the output shaft of motor, and motor is connect with controller, and load transfer system includes drive rod, cunning
Block and spring, drive rod are extend into test machine frame, are tested the transmission boom end outside machine frame and are provided with and the first umbrella tooth
The second bevel gear being meshed is taken turns, is provided with screw thread on the drive rod extending into test machine frame, slide block set is on drive rod
It is combined into lead screw pair, sliding block one end is fixedly connected with spring by connecting rod, and the other end of spring is fixed on top pressure sensor；
The structure and load transfer system of lateral load application system are identical as axial load application system and axial load transmission system,
The other end of spring is fixed on lateral pressure sensor in lateral transmission system.
Above-mentioned true triaxial dynamic pressure testing machine, the sliding block are fixedly connected with connecting rod, and one end of spring is fixed on connecting rod
On.
Above-mentioned true triaxial dynamic pressure testing machine is provided with speed probe, speed probe and control on the motor
Device connection.
Above-mentioned true triaxial dynamic pressure testing machine, between top pressure sensor and sample and lateral pressure sensor with
Pressure plare is provided between sample.
Four lateral load application systems are respectively set in the surrounding of sample in above-mentioned true triaxial dynamic pressure testing machine.
A kind of true triaxial dynamic pressure test method, includes the following steps
A. sample is placed in test machine frame, top pressure sensor is set at the top of sample, is set in the surrounding of sample
Lateral pressure sensor is set, top pressure sensor and lateral pressure sensor are connect with controller；
B. equal fixed spring on top pressure sensor and lateral pressure sensor, the other end of spring are fixed on sliding block, sliding
Block and drive rod are combined into lead screw pair, and drive rod reaches outside test machine frame, reach the transmission rod end outside test machine frame
The second bevel gear is fixed in portion；
C. motor is set in test machine frame peripheral hardware, the output shaft end of motor is provided with the first umbrella tooth engaged with the second bevel gear
Wheel；
D. motor is connect with controller；
E. controller controls corresponding motor respectively, converts the rotary motion of motor to the linear motion of sliding block, compressed spring
Or extension spring, apply pressure or pulling force to pressure sensor to reach, controller respectively to different motors into
Row control, realization carry out dynamic control to sample different sides respectively.
Above-mentioned true triaxial dynamic pressure test method is provided with speed probe, speed probe and control on the motor
Device connection processed.
Above-mentioned true triaxial dynamic pressure test method, is additionally provided with pressure plare between the pressure sensor and sample.
Compared with the existing technology, the present invention has the following advantages:
1, pulling force and pressure different on 5 directions can be applied, realize real true triaxial, and the size of pressure and pulling force
Variable, size can control.
2, it can change the area size for applying load, so as to apply load to specific region.
The present invention can apply the three-dimensional load application system of true triaxial, can apply pressure and pulling force, the size of power is controllable, power
Applying zone it is controllable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the present invention omits fore-aft loads application system and fore-aft loads transmission system.
Fig. 2 is the top view that the present invention omits axial load application system and axial load transmission system.
Specific embodiment
A kind of true triaxial dynamic pressure testing machine as depicted in figs. 1 and 2, including test machine frame 20, in test machine frame
Load application system is provided with outside frame, load application system is applied in test machine frame on test specimen by load transfer system,
The load application system includes axial load application system and lateral load application system, is provided with top pressure at the top of sample
Sensor 7, the surrounding of sample are provided with lateral pressure sensor 12, between top pressure sensor and sample and lateral pressure
Pressure plare 8 is provided between sensor and sample, top pressure sensor and lateral pressure sensor are connect with controller,
Axial load application system and lateral load application system are connect with controller.
Axial load application system is arranged at the top of sample in the present invention, is respectively set four laterally in the surrounding of sample
Load application system, including preceding load application system, rear load application system, Zuo Zaihe application system and right load apply system
System, axial load application system and lateral load application system are passed by corresponding load transfer system with corresponding pressure respectively
Sensor connection, i.e. axial load application system are connect by axial load transmission system with top pressure sensor, lateral load
Application system is connect by lateral load transmission system with lateral pressure sensor.
Axial load application system of the invention includes the motor 2 being arranged in outside test machine frame, is provided on motor
Speed probe, speed probe are connect with controller, and the first bevel gear 1, motor and control are provided on the output shaft of motor
Device connection, axial load transmission system include drive rod 4, sliding block 5 and spring 6, and drive rod is extend into test machine frame, test
Transmission boom end outside machine frame is provided with the second bevel gear 3 being meshed with the first bevel gear, extend into test machine frame
Screw thread is provided on interior drive rod, 5 sets of sliding block are combined into lead screw pair on drive rod 4, and sliding block 5 is fixedly linked with connecting rod 9, bullet
One end of spring is fixed on connecting rod, and the other end of spring is fixed on top pressure sensor 7；The knot of lateral load application system
Structure is identical as axial load application system, and lateral load transmission system is identical as the structure of axial load application system, lateral to pass
The other end of spring is fixed on lateral pressure sensor 12 in delivery system.
A kind of true triaxial dynamic pressure test method, includes the following steps
A. sample is placed in test machine frame, top pressure sensor is set at the top of sample, is set in the surrounding of sample
Lateral pressure sensor is set, pressure plare is respectively arranged between top pressure sensor and lateral pressure sensor and sample, is pushed up
Portion's pressure sensor and lateral pressure sensor are connect with controller；
B. equal fixed spring on top pressure sensor and lateral pressure sensor, the other end of spring are fixed on sliding block, sliding
Block and drive rod are combined into lead screw pair, and drive rod reaches outside test machine frame, reach the transmission rod end outside test machine frame
The second bevel gear is fixed in portion；
C. motor is set in test machine frame peripheral hardware, speed probe is provided on motor, speed probe is connect with controller, electricity
The output shaft end of machine is provided with the first bevel gear engaged with the second bevel gear；
D. motor is connect with controller；
E. controller controls corresponding motor respectively, converts the rotary motion of motor to the linear motion of sliding block, compressed spring
Or extension spring, apply pressure or pulling force to pressure sensor to reach, controller respectively to different motors into
Row control, realization carry out dynamic control to sample different sides respectively.
The present invention is provided with axial load application system and axial load transmission system at the top of sample, in sample surrounding
Four faces on be provided with lateral load application system and lateral load transmission system, while in the top of sample and surrounding
It is provided with pressure sensor on four faces, and pressure sensor is connect with controller.Whether axial or lateral in this way
(i.e. confining pressure) can be controlled respectively by by controller, and independently control is application compression or applies tensile stress, and
The size of applied force can be controlled independently on different directions.The three-dimensional load application system for realizing true triaxial, can apply pressure
The size of the pulling force of power, power is controllable, and the applying zone of power is controllable.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those skilled in the art,
Without depart from that overall concept of the invention, several changes and improvements can also be made, these also should be considered as of the invention
Protection scope, these all will not influence the effect and patent practicability that the present invention is implemented.
Claims (10)
1. a kind of true triaxial dynamic pressure testing machine, including test machine frame, are equipped with load in test machine frame peripheral hardware and apply system
System, load application system are applied in test machine frame on test specimen by load transfer system, it is characterised in that: the load is applied
Adding system includes axial load application system and lateral load application system, is provided with top pressure sensor at the top of sample, is tried
The surrounding of sample is provided with lateral pressure sensor, and top pressure sensor and lateral pressure sensor are connect with controller, axis
It is connect to load application system and lateral load application system with controller.
2. true triaxial dynamic pressure testing machine according to claim 1, it is characterised in that: axial load application system includes
Motor outside test machine frame is set, is provided with the first bevel gear on the output shaft of motor, motor is connect with controller, is carried
Lotus transmission system includes drive rod, sliding block and spring, and drive rod is extend into test machine frame, tests the transmission outside machine frame
Boom end is provided with the second bevel gear being meshed with the first bevel gear, is provided on the drive rod extending into test machine frame
Screw thread, slide block set are combined into lead screw pair on drive rod, and sliding block one end is fixedly connected with spring by connecting rod, and the other end of spring is solid
It is scheduled on top pressure sensor；The structure and load transfer system of lateral load application system and axial load application system and
Axial load transmission system is identical, and the other end of spring is fixed on lateral pressure sensor in lateral transmission system.
3. true triaxial dynamic pressure testing machine according to claim 2, it is characterised in that: the sliding block and the fixed company of connecting rod
It connects, one end of spring is fixed on connecting rod.
4. true triaxial dynamic pressure testing machine according to claim 2, it is characterised in that: be provided with revolving speed on the motor
Sensor, speed probe are connect with controller.
5. true triaxial dynamic pressure testing machine according to claim 1, it is characterised in that: in top pressure sensor and examination
Pressure plare is provided between sample and between lateral pressure sensor and sample.
6. true triaxial dynamic pressure testing machine according to claim 1, it is characterised in that: be respectively set in the surrounding of sample
Four lateral load application systems.
7. true triaxial dynamic pressure testing machine according to claim 1, it is characterised in that: sliding block is fixedly linked with connecting rod,
One end of spring is fixedly connected on connecting rod, and the other end of spring is fixed on pressure sensor.
8. a kind of true triaxial dynamic pressure test method, it is characterised in that: include the following steps
A. sample is placed in test machine frame, top pressure sensor is set at the top of sample, is set in the surrounding of sample
Lateral pressure sensor is set, top pressure sensor and lateral pressure sensor are connect with controller；
B. equal fixed spring on top pressure sensor and lateral pressure sensor, the other end of spring are fixedly connected by connecting rod
On sliding block, sliding block and drive rod are combined into lead screw pair, and drive rod reaches outside test machine frame, reach outside test machine frame
Transmission boom end fix the second bevel gear；
C. motor is set in test machine frame peripheral hardware, the output shaft end of motor is provided with the first umbrella tooth engaged with the second bevel gear
Wheel；
D. motor is connect with controller；
E. controller controls corresponding motor respectively, converts the rotary motion of motor to the linear motion of sliding block, compressed spring
Or extension spring, apply pressure or pulling force to pressure sensor to reach, controller respectively to different motors into
Row control, realization carry out dynamic control to sample different sides respectively.
9. true triaxial dynamic pressure test method according to claim 7, it is characterised in that: be provided with and turn on the motor
Fast sensor, speed probe are connect with controller.
10. true triaxial dynamic pressure test method according to claim 7, it is characterised in that: the pressure sensor with
Pressure plare is additionally provided between sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811530349.0A CN109632479A (en) | 2018-12-14 | 2018-12-14 | A kind of true triaxial dynamic pressure testing machine and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811530349.0A CN109632479A (en) | 2018-12-14 | 2018-12-14 | A kind of true triaxial dynamic pressure testing machine and test method |
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| Publication Number | Publication Date |
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| CN109632479A true CN109632479A (en) | 2019-04-16 |
Family
ID=66073947
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811530349.0A Pending CN109632479A (en) | 2018-12-14 | 2018-12-14 | A kind of true triaxial dynamic pressure testing machine and test method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114441331A (en) * | 2022-02-21 | 2022-05-06 | 中国电建集团西北勘测设计研究院有限公司 | Load test device capable of providing three-way pressure |
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Application publication date: 20190416 |