Static Ring Shear Apparatus
BORMHEAD TYPE - DRAINED
This Ring Shear apparatus is a robust construction device used for determining the drained residual strength of continuously sheared soils. It is including of 2 separate force actuator and high-quality mechanic and electronic components which produces repeatable test results, and the excellent quality makes it suitable for research and also usual test applications.
The advantage of the ring shear device over other Shear testing devices, such as the direct shear test, is its ability to accommodate very long and almost unlimited shear displacement (continuous shear) while maintaining a constant area throughout the whole test. It applies vertical and torsional independent loads by separate electromechanical force actuators, therefore it has independent control of the normal axis and shear axis in displacement (strain or velocity) mode as well as load control.
The device allows tests on different sample sizes up to 200 mm O.D. and 150 mm I.D. The frame has high stiffness to reduce deflection and vibrations, which could influence the accuracy of measurements during repeated loading tests.
- Features
- Specifications
- Software
- Standards
- Applications
- Bromhead Ring Shear box
- Residual ring shear test under drained condition
- Rigid load frame
- Unlimited shear displacement
- ICP testing method for interface testings
- Closed loop controlled axial displacement
- Closed loop controlled normal and shear stresses
- Performs a constant volume test
- Parallel guided load piston without influence of tilting or friction on sample
- Dedicated software to control all testing sequences
- Stainless steel ring shear inserts for different sample sizes
- Multi-stage test capability
- Wide range of axial and shear stress options
- True continuous shearing rate without inherent backlash
- High quality industrial controller with displayer and membrane keys or Touch panel and graphic display for monitoring of measured values and test procedures
- Real-time data and graph display
- Ethernet Port for fast data transferring to PC
- Safety functions to prevent overload and overtravel.
| Load type |
Electromechanical |
| Normal force |
5kN/ 10kN / 20kN |
| Shear force (Torque) | 420 N-m / 1100 N-m |
| Torsional shear displacement |
Unlimited |
| Resolution of shear stress: | <0.01 kPa |
| Resolution of Axial stress: |
<0.01 kPa |
| Accuracy class |
0.1% |
| Sample Sizes |
Outer/inner/height (mm) Ø100 / Ø 50 / 20 Ø200 / Ø 100 / 20 |
| Computer Interface |
Ethernet |
GEOsys is designed for closed-loop controlled static & Dynamic tests for all test applications in material testing, such as stress-controlled, strain-controlled, all stress paths, loops, any kind of waveforms like sine, rectangle, triangle, and predefined wavesIt is controlling and data acquisition software and also has different modules to run tests according to ASTM or BS or other standards. Please note that some tests listed below will require optional hardware. Depends on the requirement of the customer one or several modules would be delivered with main software, such as:
- Data Acquisition, processing and device management (DPD) Module
- Consolidation Module
- Static Shear Stage Module
- Constant Normal Stiffness Test (CNS)
- Residual Shear Test
- ICP Test Module
- Dynamic Shear Stage Module(Available for Cyclic Ring Shear device)
- Advanced loading Module
- Temperature Controlled Ring Shear Testing (Available for THM Ring Shear Test Device)
- Unsaturated Test Module(Available for unsaturated Ring Shear Test Device)
- ASTM-D6467-13
- ASTM-D7608-10
- BS 1377-7
Standard Test Method for Torsional Ring Shear Test to Determine Drained Residual Shear Strength of Cohesive Soils
Standard Test Method for Torsional Ring Shear Test to Determine Drained Fully Softened Shear Strength and Nonlinear Strength Envelope of Cohesive Soils
Methods of test for Soils for civil engineering purposes - Part 7: Shear strength tests (total stress)
- Detailed information will follow soon
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