Description

The TTC true triaxial compression cell 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.

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