CN213986264U - Device for freeze-thaw cycle test under confining pressure condition - Google Patents
Device for freeze-thaw cycle test under confining pressure condition Download PDFInfo
- Publication number
- CN213986264U CN213986264U CN202022871813.1U CN202022871813U CN213986264U CN 213986264 U CN213986264 U CN 213986264U CN 202022871813 U CN202022871813 U CN 202022871813U CN 213986264 U CN213986264 U CN 213986264U
- Authority
- CN
- China
- Prior art keywords
- freeze
- sample
- test
- confining pressure
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a device that is used for freezing and thawing cycle test under confined pressure condition. The device comprises a freeze-thaw test working module and a freeze-thaw test control module for controlling the work of the freeze-thaw test working module. The freeze-thaw test work module comprises a test box body capable of being hermetically covered, and a sample bracket, an axial pressure applying unit and a confining pressure unit which are arranged in the test box body. The sample bracket is used for bearing a sample to be tested, and the axial pressure applying unit and the confining pressure unit are respectively used for providing axial pressure and confining pressure for the sample to be tested. The freeze-thaw test control module comprises a temperature control unit, a pressure control unit and a control panel and is used for controlling the temperature and pressure environment of the freeze-thaw test working module. The utility model discloses an axle load is applyed to the sample to accurate hydraulic oil pump, carries out confining pressure through confining pressure device to the sample, carries out circulating freeze thawing through the freeze thawing case to the sample, and the mechanical properties of survey sample can be applyed the confining pressure for the test piece and simulate more real rock stress state.
Description
Technical Field
The utility model relates to a civil engineering test technical field especially relates to a device that is used for freezing and thawing cycle test under confined pressure condition.
Background
In severe cold areas, the temperature difference between day and night is large, the rock is subjected to the circulating action of low temperature and high temperature, the internal damage to the rock is large, and the mechanical property of the rock is greatly influenced. Rock weathering caused by freeze-thaw cycle is one of the main geological disasters, and with the development of western cold region resources, rocks under the conditions of low temperature and alternating temperature are increasingly touched in the building and operation processes of civil engineering such as cold region railways, roads, tunnels and the like. The engineering structure rock in the cold region is always in a certain stress field and bears the freeze-thaw cycle effect of changing seasons and day and night, the existing environment has important influence on the mechanical property of the rock, and the deformation failure mechanism of the engineering structure rock shows different characteristics compared with the normal temperature. The rock is an aggregate of various mineral particles formed under the geological action, is a natural damaged material, is influenced by the occurrence environment, internal microscopic defects expand and aggregate, and the material is continuously damaged, so that the stress performance of the rock is deteriorated and the rock is damaged. The research on the mechanical properties of freeze-thaw rocks becomes a key scientific problem which is urgently needed to be solved for the prevention and treatment of freeze-thaw disasters.
At present, the mechanical properties of rocks in a freeze-thaw cycle state are deeply researched at home and abroad, but most of the rocks are only limited to a unidirectional stress state, and the action of confining pressure is not considered, particularly the normal confining pressure condition is simulated; and most of the materials are concentrated under the action of external load, and the action effects of temperature effect and freeze-thaw cycle are not involved. The rock mass confining pressure causes the natural rock mass to show the characteristics which are completely different from the characteristics under the condition of no confining pressure stress (such as common rock sample blocks prepared under the laboratory environment) and the condition of low confining pressure stress in a superficial stratum, so that the reappearance and simulation of the rock confining pressure level are particularly important for the accuracy of the test result in the test research processes of safety evaluation, disaster prevention and control and the like of deep high-stress underground engineering.
In view of the above, there is a need for an improved apparatus for freeze-thaw cycling under confining pressure conditions to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device that is used for freezing and thawing cycle test under confined pressure condition. The device exerts the axle load through accurate hydraulic oil pump to the sample, carries out the confining pressure through the confining pressure device to the sample, carries out the circulation freeze thawing to the sample through the freeze thawing case, surveys the mechanical properties of sample, has the characteristics that the noise is low, the environmental protection, take up an area of for a short time, installation migration is convenient.
In order to realize the purpose of the utility model, the utility model provides a device for freeze-thaw cycle test under confining pressure, which comprises a freeze-thaw test working module and a freeze-thaw test control module for controlling the work of the freeze-thaw test working module; the freeze-thaw test working module comprises a test box body capable of being hermetically covered, and a sample bracket, an axial pressure unit and a confining pressure unit which are arranged in the test box body; the axial pressure applying unit and the confining pressure unit are respectively used for providing axial pressure and confining pressure for the sample to be tested;
the freeze-thaw test control module comprises a temperature control unit, a pressure control unit and a control panel, and the control panel is respectively and electrically connected with the temperature control unit, the pressure control unit, the axial pressure applying unit and the confining pressure unit; the temperature control unit and the pressure control unit are respectively used for controlling the temperature and the pressure of the freeze-thaw test working module.
As a further improvement of the present invention, the axial pressure applying unit includes a hydraulic cylinder sleeved on the side wall of the test box body, and is used for providing axial pressure to the sample to be tested; the hydraulic oil cylinder is fixedly connected with the test box body through a box arm connecting flange.
As a further improvement of the utility model, the hydraulic oil cylinder comprises a cylinder barrel, a piston rod, an oil outlet and an oil return port; the piston rod is arranged inside the test box body and sleeved in the cylinder barrel, the cylinder barrel is arranged outside the test box body, the oil return port is located at the joint of the cylinder barrel and the side wall of the test box body, and the oil outlet is located at one end, far away from the side wall of the test box body, of the cylinder barrel.
As a further improvement of the present invention, the confining pressure unit includes an annular confining pressure device sleeved on the sample bracket, and is used for applying radial pressure to the sample to be tested on the sample bracket.
As a further improvement, the confining pressure unit further comprises a confining pressure supporting seat arranged below the annular confining pressure device, and is used for fixing the sample to be tested.
As a further improvement of the utility model, the sample bracket includes square fretwork sample body bracket and apron, set up in the bracing piece of square fretwork sample body bracket both sides and set up in the bottom plate that bears of square fretwork sample body bracket tip is used for supporting and fixing square fretwork sample body bracket.
As a further improvement, the inside of the square hollow sample body bracket is provided with a U-shaped groove.
As a further improvement, the temperature control unit comprises a heating unit, a refrigerating unit and a temperature conversion unit, and is respectively used for providing three test environments of high temperature, low temperature and temperature conversion for the sample of the freezing and thawing test working module.
As a further improvement of the present invention, the heating unit includes a heater, the refrigerating unit includes a refrigeration compressor, and the temperature conversion unit includes a cold heat exchanger.
As a further improvement, the test box comprises a box body, a box cover plate and a box hasp, wherein the box hasp is used for connecting the box body and the box cover plate in an airtight manner.
The utility model has the advantages that:
1. the utility model provides a device for freezing and thawing cycle test under confined pressure condition applys a confined pressure to the sample on the basis of freezing and thawing case, adopts the record appearance control, shows temperature and experiment curve, cycle number and cycle number etc. in real time, and economy is nimble, the sexual valence relative altitude. The equipment has the functions of fault self-diagnosis alarm, ultrahigh voltage alarm, ultralow voltage alarm, overcurrent alarm, thermal protection alarm and the like, and has high use safety. The freeze thawing and refrigerating unit is integrated, the noise is low, the environment is protected, the occupied area is small, the installation and the migration are convenient, and the bottom of the unit is provided with a brake moving caster; the device adopts the air cooling unit, does not need the cooling tower, has characteristics such as noise is little.
2. The utility model provides a device for freezing and thawing cycle test under confined pressure condition, (1) the degree control of center test piece is at-20 ~ 20 ℃ within range, and the control accuracy is 0.1 ℃, and the liquid sensor diagonal temperature control of incasement, the temperature range is no longer than 2 ℃; (2) the precise hydraulic oil cylinder enables the loading force of the sample to be convenient and fast under the condition of freeze thawing test; (3) the force value loading structure and the bracket in the box enable the placement and positioning of the sample to be free from deviation and the force value loading transmission to be accurate; (4) the structural material is made of stainless steel with excellent corrosion resistance and toughness; (5) the sample location bracket and the sample apron of fretwork can prevent through radial positioning that the sample from receiving to cause the damage of experiment assistive device after the extrusion breakage, improve experimental facilities's reuse rate.
3. The utility model provides a device for freezing and thawing cycle test under confined pressure condition applys the axle load through accurate hydraulic oil pump to the sample, and the confined pressure device carries out the confined pressure to the sample, and the freezing and thawing case carries out the circulation freeze thawing to the sample, can apply the more real rock stress state of confined pressure simulation for the test piece, makes the research of rock more deep.
Drawings
Fig. 1 is a schematic structural view of a freeze-thaw cycle test device used under confining pressure conditions according to the present invention;
FIG. 2 is a schematic top view of the device for freeze-thaw cycling test under confining pressure according to the present invention;
fig. 3 is a left side view structure diagram of the device for freezing and thawing cycle test under confining pressure.
Reference numerals
10-test box body; 11-axial pressure applying unit; 110-a cylinder barrel; 111-a piston rod; 112-an oil outlet; 113-oil return port; 12-confining pressure unit; 13-confining pressure supporting seat; 14-a load floor; 15-sample holder; 16-a support bar; 17-box arm connecting flange; 18-box hasp; 21-a pressing unit; 22-a heating unit; 23-a temperature conversion unit; 24-a refrigeration unit; 25-control panel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the specific embodiments, and other details not relevant to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1 to 3, the present invention provides a device for freeze-thaw cycle testing under confining pressure, which comprises a freeze-thaw test working module and a freeze-thaw test control module for controlling the work of the freeze-thaw test working module. The freeze-thaw test work module comprises a test box body 10 capable of being hermetically covered, and a sample bracket 15, an axial pressure applying unit 11 and a confining pressure unit 12 which are arranged in the test box body. The sample bracket is used for bearing a sample to be tested, and the axial pressure applying unit 11 and the confining pressure unit 12 are respectively used for providing axial pressure and confining pressure for the sample to be tested. The freeze-thaw test control module comprises a temperature control unit, a pressure control unit and a control panel 25, wherein the control panel 25 is respectively and electrically connected with the temperature control unit, the pressure control unit, the axial pressure applying unit 11 and the confining pressure unit 12; the temperature control unit and the pressure control unit are respectively used for controlling the temperature and the pressure of the freeze-thaw test working module.
The control panel 25 can control and record the temperature of the sample, display the temperature and an experimental curve, the cycle times, the circulated times and the like in real time, and is economical, flexible and high in cost performance. Particularly, the freeze-thaw test control module further comprises a fault self-diagnosis alarm unit, an ultrahigh-voltage alarm unit, an ultralow-voltage alarm unit, an overcurrent alarm unit, an overheating protection alarm unit and the like, so that multidirectional automatic danger alarm is realized, and the use safety of the device is improved.
As shown in fig. 3, the test box 10 includes a box body, a box cover plate, and a box hasp 18, where the box hasp 18 is used to connect the box body and the box cover plate in a sealing manner, so as to maintain the temperature of the test box, reduce heat loss, and improve heat utilization rate.
Referring to fig. 1 and 3, the axial pressure applying unit 11 includes a hydraulic cylinder sleeved on the side wall of the test box for providing an axial pressure to the sample to be tested; the hydraulic oil cylinder is fixedly connected with the test box body through a box arm connecting flange 17, so that the hydraulic oil cylinder is tightly fixed on the test box body.
Specifically, the hydraulic oil cylinder comprises a cylinder barrel 110, a piston rod 111, an oil outlet 112 and an oil return port 113; the piston rod is arranged inside the test box body and sleeved in the cylinder barrel, the cylinder barrel is arranged outside the test box body, the oil return port 113 is located at the joint of the cylinder barrel 110 and the side wall of the test box body, and the oil outlet 112 is located at one end, far away from the side wall of the test box body, of the cylinder barrel 110. The precise hydraulic oil cylinder enables the sample loading force to tend to be convenient and fast under the freeze thawing test condition, the starting equipment starts the hydraulic oil pump to enable the oil cylinder piston rod 111 to perform linear reciprocating motion, and the requirements of the sample loading force value and the force value loading time are met through initial quick movement and manual micro-motion adjustment operation during critical pressure.
The confining pressure unit 12 comprises an annular confining pressure device sleeved on the sample bracket 15 and used for applying radial pressure to the sample to be tested on the sample bracket 15. The confining pressure unit 12 further comprises a confining pressure supporting seat 13 arranged below the annular confining pressure device and used for fixing the sample to be tested.
Particularly, the inside of square fretwork sample body bracket is equipped with U type groove.
In some embodiments, the sample carrier 15 further comprises a force loading structure and a radial positioning structure (not shown). The force value loading structure is matched with the square hollow sample body bracket, so that the sample placing and positioning are free from deviation, and the force value loading transmission is accurate. The structural material is made of stainless steel with excellent corrosion resistance and toughness. The sample location bracket and the sample apron of fretwork carry out radial positioning through radial positioning structure when using, can prevent that the sample from receiving the experiment that causes after the extrusion breakage to assist the utensil and damage, improve experimental facilities's reuse rate.
The temperature control unit comprises a heating unit 22, a refrigerating unit 24 and a temperature conversion unit 23, and is respectively used for providing three test environments of high temperature, low temperature and temperature conversion for the samples of the freeze-thaw test working module. In some embodiments, the heating unit 22 comprises a heater, the refrigeration unit 24 comprises a refrigeration compressor (which is a home and abroad brand product original equipment and has stable performance), and the temperature conversion unit 23 comprises a cold-heat exchanger, which can simulate an optimal stress environment.
The freeze thawing test and control unit of the utility model is integrated, has low noise, environmental protection, small occupied area and convenient installation and migration, and the bottom of the unit is provided with a brake moving caster; the device adopts the air cooling unit, does not need the cooling tower, has characteristics such as noise is little. Temperature control range of the central test piece: the temperature is-20 to 20 ℃, and the temperature can be adjusted through parameter setting, and the control accuracy is +/-0.1 ℃; the diagonal temperature of the liquid sensor in the tank is controlled, and the temperature range is not more than 2 ℃.
The utility model is used for the experimental flow of the device of freeze thawing cycle test under the confined pressure condition as follows:
1. soaking a 50 x 100 rock freeze-thaw test piece in water at a required temperature, wherein the water surface is 20-30 mm higher than the top surface of the test piece during soaking, and performing subsequent experiments after the soaking time meets requirements;
2. taking out the rock freeze-thaw test piece meeting the requirements from water, wiping the test piece by using wet cloth, putting the test piece with the appearance size meeting the standard requirements into a U groove of a test piece hollowed bracket, and correspondingly and reliably installing and fastening a hollowed cover plate so as to ensure that the radial positioning of the test piece is accurate;
3. placing a test piece bracket between two support rods 16 in a freeze-thaw box, sleeving the end of a piston rod 111 of an oil cylinder into the middle position of a square hole at one end of a hollow frame in the axial direction of a test piece, enabling the other end of the piston rod to be close to a bearing bottom plate 14 without leaving a gap, sleeving a confining pressure device on the test piece, and fixing the confining pressure device on a confining pressure support seat 13;
4. injecting a freezing and thawing medium into the test box body of the freezing and thawing box, and enabling the freezing and thawing medium to submerge the top surface of the test piece to meet the specified requirements;
5. starting a hydraulic oil pump by starting equipment to enable an oil cylinder piston rod to perform linear reciprocating motion, and realizing the requirements of a sample loading force value and force value loading time through initial quick movement and manual micro-motion adjustment operation at critical pressure;
6. the test piece is placed in a freeze-thaw test working chamber and is loaded with force, the experimental equipment and instrument automatically controls the repeated cooling and heating of the test piece, and the test flow of freezing and thawing the test piece is performed periodically.
To sum up, the utility model discloses an axle load is applyed to the sample to accurate hydraulic oil pump, and confining pressure device carries out confining pressure to the sample, and the freeze thawing case carries out the circulation freeze thawing to the sample, can apply confining pressure simulation truer rock stress state for the test piece, makes the research of rock more deep. The equipment has the functions of fault self-diagnosis alarm, ultrahigh voltage alarm, ultralow voltage alarm, overcurrent alarm, thermal protection alarm and the like, and has high use safety. The sample location bracket and the sample apron of fretwork can prevent through radial positioning that the sample from receiving to cause the damage of experiment assistive device after the extrusion breakage, improve experimental facilities's reuse rate.
The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The device for the freeze-thaw cycle test under the confining pressure condition is characterized by comprising a freeze-thaw test working module and a freeze-thaw test control module for controlling the work of the freeze-thaw test working module; the freeze-thaw test working module comprises a test box body (10) which can be closed in a sealing way, and a sample bracket (15), an axial pressure unit (11) and a confining pressure unit (12) which are arranged in the test box body; the sample bracket is used for bearing a sample to be tested, and the axial pressure applying unit (11) and the confining pressure unit (12) are respectively used for providing axial pressure and confining pressure for the sample to be tested;
the freeze-thaw test control module comprises a temperature control unit, a pressure control unit and a control panel (25), wherein the control panel (25) is electrically connected with the temperature control unit, the pressure control unit, the axial pressure applying unit (11) and the confining pressure unit (12) respectively; the temperature control unit and the pressure control unit are respectively used for controlling the temperature and the pressure of the freeze-thaw test working module.
2. The apparatus for testing freeze-thaw cycles under confining pressure conditions according to claim 1, wherein the axial pressing unit (11) comprises a hydraulic cylinder sleeved on the side wall of the test box for providing axial pressure to the sample to be tested; the hydraulic oil cylinder is fixedly connected with the test box body through a box arm connecting flange (17).
3. The apparatus for freeze-thaw cycling testing under confining pressure conditions according to claim 2, wherein the hydraulic cylinder comprises a cylinder (110), a piston rod (111), an oil outlet (112) and an oil return (113); the piston rod is arranged inside the test box body and sleeved in the cylinder barrel, the cylinder barrel is arranged outside the test box body, the oil return opening (113) is located at the joint of the cylinder barrel (110) and the side wall of the test box body, and the oil outlet (112) is located at one end, far away from the side wall of the test box body, of the cylinder barrel (110).
4. The apparatus for testing freeze-thaw cycles under confining pressure conditions according to claim 1, wherein the confining pressure unit (12) comprises an annular confining pressure device sleeved on a sample carrier (15) for applying radial pressure to a sample to be tested on the sample carrier (15).
5. The apparatus for freeze-thaw cycling tests under confining pressure conditions according to claim 4, wherein the confining pressure unit (12) further comprises a confining pressure support base (13) disposed below the annular confining pressure device for fixing the test sample to be tested.
6. The device for the freeze-thaw cycle test under confining pressure condition according to claim 1, wherein the sample holder (15) comprises a square hollow sample holder and a cover plate, support rods (16) disposed at two sides of the square hollow sample holder, and a bearing bottom plate (7) disposed at an end of the square hollow sample holder for supporting and fixing the square hollow sample holder.
7. The device for the freeze-thaw cycle test under confining pressure condition according to claim 6, wherein a U-shaped groove is formed inside the square hollow sample body bracket.
8. The apparatus for testing freeze-thaw cycles under confining pressure according to claim 1, wherein the temperature control unit comprises a heating unit (22), a refrigerating unit (24) and a temperature conversion unit (23) for providing three test environments of high temperature, low temperature and temperature conversion for the samples of the freeze-thaw test working module, respectively.
9. The apparatus for testing freeze-thaw cycles under ambient pressure according to claim 8, wherein the heating unit (22) comprises a heater, the refrigeration unit (24) comprises a refrigeration compressor, and the temperature conversion unit (23) comprises a cold-heat exchanger.
10. The apparatus for freeze/thaw cycling testing under confining pressure conditions according to claim 1, wherein the test chamber (10) comprises a chamber body, a chamber cover plate and a chamber snap (18), the chamber snap (18) being for hermetically connecting the chamber body and the chamber cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022871813.1U CN213986264U (en) | 2020-12-04 | 2020-12-04 | Device for freeze-thaw cycle test under confining pressure condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022871813.1U CN213986264U (en) | 2020-12-04 | 2020-12-04 | Device for freeze-thaw cycle test under confining pressure condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213986264U true CN213986264U (en) | 2021-08-17 |
Family
ID=77240674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022871813.1U Active CN213986264U (en) | 2020-12-04 | 2020-12-04 | Device for freeze-thaw cycle test under confining pressure condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213986264U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115876608A (en) * | 2023-03-09 | 2023-03-31 | 成都理工大学 | Rock-soil mechanics test device and method in-situ freeze thawing-dry-wet cycle environment |
| CN116399732A (en) * | 2023-06-08 | 2023-07-07 | 北京科技大学 | Visual test system and method for rapid auxiliary rock breaking through freezing and thawing cold and hot impact |
-
2020
- 2020-12-04 CN CN202022871813.1U patent/CN213986264U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115876608A (en) * | 2023-03-09 | 2023-03-31 | 成都理工大学 | Rock-soil mechanics test device and method in-situ freeze thawing-dry-wet cycle environment |
| CN115876608B (en) * | 2023-03-09 | 2023-05-16 | 成都理工大学 | Rock-soil mechanical test equipment and method in-situ freeze thawing-dry-wet circulating environment |
| CN116399732A (en) * | 2023-06-08 | 2023-07-07 | 北京科技大学 | Visual test system and method for rapid auxiliary rock breaking through freezing and thawing cold and hot impact |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213986264U (en) | Device for freeze-thaw cycle test under confining pressure condition | |
| CN106680129B (en) | Rock sample recycles the simulation of dry and wet freezing-thawing and damage deterioration test device | |
| Lloret et al. | Advances on the knowledge of the thermo-hydro-mechanical behaviour of heavily compacted “FEBEX” bentonite | |
| Alzoubi et al. | Artificial ground freezing: A review of thermal and hydraulic aspects | |
| CN110455699B (en) | Concrete corrosion experiment device and using method | |
| Yamabe et al. | Determination of some thermo-mechanical properties of Sirahama sandstone under subzero temperature condition | |
| O'Neill | The physics of mathematical frost heave models: A review | |
| Hu et al. | Application of damage model for soil–structure interface | |
| Liu et al. | Influence of temperature on the volume change behavior of saturated sand | |
| CN103728185A (en) | Low-temperature dynamic triaxial apparatus | |
| Tao et al. | Development of generalized interpolation material point method for simulating fully coupled thermomechanical failure evolution | |
| CN111398024B (en) | True triaxial rock seepage test loading device and test system | |
| CN109163986A (en) | A kind of marine climate environment-torsional load coupling test device and test method | |
| Zhao et al. | Strain responses of frozen clay with thermal gradient under triaxial creep | |
| Razaqpur et al. | Frost-induced deformations and stresses in pipelines | |
| Ohnishi et al. | Thames | |
| CN107941625A (en) | Rock full rigidity true triaxial system and deep rock mass temperature stress coupled simulation system | |
| Gao et al. | Dynamic behaviors of water-saturated and frozen sandstone subjected to freeze-thaw cycles | |
| Zhang et al. | Modeling damage evolution in granite under temperature using a thermo-mechanical grain-based FDEM model | |
| Wang et al. | Macro-meso damage and fracture model for determining the creep characteristics of shale under osmotic pressuresure | |
| Zhang et al. | Laboratory study on the damage characteristics of shale under different liquid nitrogen injection rates | |
| Li et al. | A coupled chemo-elastoplastic-damage constitutive model for plain concrete subjected to high temperature | |
| Langlais et al. | A theoretical and experimental study of convective effects in loose-fill thermal insulation | |
| Yan et al. | Numerical simulation of thawing process in frozen soil | |
| Emami Ahari et al. | Development of temperature-controlled direct shear box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |