Multi Directional Dynamic Simple Shear Apparatus
Bi-directional Dynamic Direct Simple Shear device
This innovative device enables direct simple shear testing in two directions, going beyond the conventional single-direction approach. It features a secondary shear actuator positioned at 90 degrees to the primary actuator, allowing for versatile functionality.
As a variable direction machine, the secondary shear axis can operate independently or in tandem with the primary axis, facilitating direct simple shear in any horizontal direction. This capability allows for tests with continuously rotating shear vectors, enhancing the flexibility and accuracy of your experiments.
It provides a platform for different experimental setups, such as test cells, or building structures that serve as a boundary for various applications. The experimental setup represents a friction-less bearing vibration table with a large triaxial cell. The objective of such machinery is to investigate the grain skeleton under cyclic and dynamic loads. This tests the liquefaction behavior under saturated and unsaturated conditions.
- Features
- Specifications
- Software
- Standards
- Applications
- 3 x dynamic axis with servo-hydraulic or electromechanical actuators up to 30 kN, 30 Hz
- 2 x dynamic horizontal axis for two-dimensional shear loading
- Small and large sample sizes up to 250 mm for large grain sizes
- Isotropic and anisotropic consolidation and shear procedures with K0-Conditions
- Small non-contact strain measurements during cyclic and dynamic test procedures
- Submersible 3-dimensional load transducers for the simultaneous measurement of all three axes
|
Load type |
Electromechanical |
Servohydraulic |
|
Normal force (X) |
2 kN / 5 kN / 10 kN |
10 kN / 20 kN / 30 kN |
|
Shear forces (Y and Z) |
2 kN / 5 kN / 10 kN |
10 kN / 20 kN / 30 kN |
|
Frequency |
Up to 10Hz |
Up to 30 Hz |
|
Accuracy class |
0.1% |
0.1% |
|
Resolution |
0.00001 kN |
0.00001 kN |
|
Vertical displacement |
50 mm |
50 mm |
|
Shear displacement |
25 mm |
25 mm |
|
Resolution |
0.001mm |
0.001mm |
|
Computer Interface |
Ethernet |
Ethernet |
|
sample size |
Up to Ø 150mm diameter |
Up to Ø 250mm diameter |
|
|
GEOsys is designed for closed-loop controlled static & Dynamic tests for all test applications in material testing, such as stress-controlled, strain-controlled, any kind of waveforms like sine, rectangle, triangle, and predefined waves.
It is controlling and data acquisition software and also has different modules to run tests according to ASTM.
Control Parameters: The normal load (axial) and Shear load (Horizontal) can be operated in constant, ramp or cycle modes in three different operating modes:
- Velocity control
- Force control
- Displacement control
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 Stage (Single stage, multiple stage or over consolidation mode)
- Static Shear module (Displacement or stress controlled)
- Cyclic simple shear test Constant Normal Stress test
- Constant Normal Height test (active height control)
- Constant normal stiffness test (CNS)
- Shear stress-controlled test (constant, ramp and cyclic)
- Shear displacement control (constant, ramp and cyclic)
- Calculation of shear stresses
- Low speed creep testing
- Not available
- Detailed information will follow soon