YDS-3Geotechnical Mechanics Multi-functional Testing Instrument

Fully Automatic Straight-Cut Tester with Computer Control

YDS-3The Rock Direct Shear Test Machine is a computer servo-controlled fully automatic direct shear test machine independently researched, developed, and produced by our company, based on the technical requirement proposal proposed by Chengdu University of Technology. It is mainly used for variousDirect shear test of rock (soil). The testing machine can simultaneously apply vertical (normal) test force and horizontal test force (shear force) to the sample, and can also simultaneously measure the vertical and horizontal deformation of the sample, with the loading and unloading force speed controlled by the servo oil circuit.

Our company adheres to the principles of continuous development and innovation, and in a short span of time, ...4In one year, we have launched three generations of products, with significant improvements in reliability and accuracy.

On-site photos

One,Key Features

1） Can conduct a variety of tests

1. AchievableComplete rock or soil direct shear test;

2 Achievable direct shear test for rock or soft rock structures；

3 Single-axis compression deformation test can be performed.

3 Tensile strength test on rock material; (Blast-furnace method)

4 Achievable two-axis compression deformation test.

5 Achievable two-axis cyclic compression deformation test.

2） Utilizing imported servo valves in conjunction with our independently produced high-precision pressure sensors to form a closed-loop servo control system. Offers high measurement accuracy and superior control performance.

3） The normal load reaction frame features a sliding track with ball bearings in place to reduce friction. This design ensures the specimen remains in the correct position during testing while virtually eliminating the influence of friction on the normal force, thereby enhancing the accuracy of normal force data collection.

4） The shear load reaction frame features a moving track with ball bearings arranged to reduce friction. This ensures the position of the specimen under load during the experiment. In collaboration with Chengdu University of Technology, we have conducted joint experimental discussions and introduced the installation of a shear force sensor at the rear of the cutting box. This installation method completely eliminates the influence of horizontal friction forces on the shear force during the experiment, significantly enhancing the accuracy of the test.

5） System features4-axis normal displacement sensors and 2-axis horizontal displacement sensors, which simultaneously complete the shear test and the compression deformation test of the specimen.

6） Due to our company's complete in-house R&D and production, we can accommodate various dimensional requirements for shear testing.

7） The computerized automatic control of normal force and shear force ensures the stable maintenance of normal force and precise control of shear speed.

8） Real-time data and graphical display features make the entire experimental process more intuitive.

9） After the experiment, printable displacement vs. shearing stress curve graphs, report generation, and printing are available.C. φ Curve Chart

Two,Key Technical Specifications

1） Normal Maximum Pressure:600kN, control range (5% - 100%); ( customizable)

2） Maximum horizontal pressure:300kN control range (5% - 100%); ( customizable)

3） Test Force Measurement Error:±0.5% Indication

4） Test Force Control Stability±1% reading accuracy

5） Normal deformation measurement range:0～10mm；

6） Horizontal deformation measurement range:0～20mm；

7） Deformation measurement error:±0.01mm；

8） Normal and horizontal loading speed:1.25kN～10kN/S；

9） Normal and horizontal piston maximum stroke:90mm；

10） Sample:

Cubic sample50×50×50mm, 100×100×100mm (customizable)

Section 3:Measurement Window

YDS-3Rock Direct Shear Test Data Collection System. Designed based on years of experimental experience from Chengdu University of Technology, our program is developed with the principles of simplicity in operation, convenience, and reliable experimental data, receiving unanimous praise from a wide range of users.

Pressure, tensile stress, shear force, shear stressVertical and horizontal displacement data are displayed in real time; shear force——The horizontal displacement curve is displayed in real-time, making the entire experimental process clear at a glance. It's an excellent assistant for both educational institutions in teaching and research units in data analysis.

Trial Window Overview

1Rock Shear Test Test Name ( displays 'Searching' when no equipment is available)

2Equipment Shutdown     Hydraulic Station Status

 To ensure students' safety during the process of changing specimens, we automatically shut down the hydraulic station after each experiment.

3Open File Open Existing File

4Zero Positioning Sensor Position Reset

5Parameter Settings      Set parameters for sensor systems and other infrequently changing elements

6Parameter Settings 2Set parameters during each test process

6Parameter Settings 2Set parameters during each testing process

7Start Data Collection      Start Data Collection Count (Note: The hydraulic station status must be "Equipment Idle" and the force sensor reading must be zero)

8End Data Collection End One Data Collection Session

9Save Test Save Current Sample Data

10Re-test      Initiate a new set of tests

11) Generate Report Generate Cφ curve chart (minimum of 3 experimental points)

12Print Curve Print the currently displayed curve

13Normal Load  | Pressure Value Received by the Pressure Transducer－600kN。

14) Normal Stress（MPa）

15Shear Load      Pressure value exerted on the horizontal pressure sensor－300kN。

16) Shear Stress（MPa）

17Normal Displacement Normal Displacement 1——4It is a single displacement value; the average normal displacement is 4Average displacement value.

If the displacement sensor is not in use, please set the channel displacement transmission system to zero.

18Horizontal displacement      Same as normal displacement

19) Time Current time spent on the experiment, unit: S

20(Normal Data Frame)  When data is saved or opened, the normal maximum stress of the saved or opened data, as well as the normal maximum stress

Maximum horizontal stress, normal displacement, and horizontal displacement. Users can select the file to be processed by choosing the circle at the top.

FourDimensions:1380*780*1620(Length: )Wide*High, Unit: mm）

FiveOverall Machine Weight:1200KG

Photos of students conducting experiments on-site

Direct Shear Test Photo

Cφ curve