Triaxial compression cell Load Frame triaxial systems Instruments

The Triaxial compression cell Load Frame triaxial systems Instruments is designed for testing cubic rock specimens under fully independent X, Y, and Z stress control. It accurately reproduces complex anisotropic in-situ stress states. Samples may be tested in dry, partially saturated, or fully saturated conditions, without pore pressure control. Optional temperature regulation allows simulation of deep subsurface environments. The cell enables precise measurement of principal stresses, strain evolution, and failure conditions under true triaxial loading. An optional acoustic system measures compressional P-waves and orthogonal shear waves S1 and S2 along all three axes. Velocity variations provide insight into elastic moduli evolution, crack closure, stress-induced anisotropy, and progressive damage. The system can also be configured for hydraulic fracturing tests with controlled fluid injection under true triaxial stress. Fracture initiation and propagation are monitored in real time using acoustic emission sensors, enabling detailed characterization of breakdown pressure and damage mechanisms. The cell must be installed within a load frame capable of applying up to 1000 kN along the Z-axis, while two independent hydraulic pressure pumps are used to generate and control the X and Y stresses on the specimen.

Sample dimensions :

Type 1 :

• 1.5 × 1.5 × 3 inches

Type 2 :

• 50 × 50 × 100 mm

Other dimensions :

• Available upon request

Maximum Z stress :

• Type 1: 689 MPa
• Type 2: 400 MPa

Maximum Y stress :

• 70 MPa

Maximum X stress :

• 70 MPa

Maximum pore pressure :

• Ambient to 120°C (optional)

Connection ports :

• 1/8 inch LP

Wetted parts :

• Stainless steel or Inconel

• Realistic simulation of in-situ anisotropic stress conditions
• Independent control of three principal stresses (X, Y, Z)
• High stress capacity for testing strong rock materials
• Advanced monitoring capabilities (strain, ultrasonic waves, acoustic emission)
• Capability to perform hydraulic fracturing tests under controlled true triaxial stress conditions