1、The system would directly proceed digital servo control on all three principal stresses/strains to simulate in-situ large stress/strain path testing, including plane strain, Ko and small shear strain. The other testing supplied include dynamic shear strength and deformation, shear modulus and damping ratio, and other user-defined programs;
2、With dynamic-static loading function.
3、With multi-direction vibration loading function of axial direction & confining pressure or horizontal direction.
4、Freely converting of stress/strain control.
5、The P/q path could freely control the stress path during testing.
6、They are common compression system between static-dynamic pressure.
Technical spec：
Model RSTD-10
Pressure mode The direction ofσ1&σ2 is rigidity loading,with electro-hydraulic servo actuator.Sliding with each other among the 4th steel plate.the direction of σ3 is confining loading and medium is water,pressing by elctro-hydraulic pressure/volume controller. Max stressσ1=5MPa, intermediate σ2=5MPa,
Minor σ3=2MPa
Specimens size 75x75x150mm
Pressure chamber Anode electroplated aluminium true triaxial pressure chamber,with viewport of front-back.
Electro-hydraulic actuator The stroke of four is 0-50mm ,the stroke of two is 0-100mm.
Speed:0-100mm/s
Static pressure » +/-25kN， acuuracy is 0.15%
Dynamic pressure » +/-20kN， acuuracy is 0.15%
dynamic loading reate more than 20Hz
Sensor LVDT displacement sensor The stroke of two is 0-50mmand 0-100mm
Waterproof load sensor The range of four is ±25kN and accuracy is more than 0.15%
Electro-hydraulic servo confining pressure pressure ≧2MPa
volume ≧500ml
resolution ≦1ml
Max dynamic frequency 10Hz
Deform sensor of range 0-100mm
linear 0.25%
With dynamic loading function , max frequency is 10Hz
Pressure sensor Range ≧2MPa,linear ≧0.25%
Electro-dydraulic servo pore pressure pressure ≧2MPa
volume ≧200ml
resolution ≧1ml
With dynamic loading function ,max frequency is more than10Hz
Deform sensor Range:0-100mm,linear≧0.25%
Servo oil sources oil pump capacity 19L/min，10HP
output pressure 21MPa
fuel tank voltage 100L
With indicators, pressure filters and return filters, pressure gauges, valves, thermal protection and liquid level protection, heat exchangers, hydraulic hose(10m), and oil temp&liquid level sensor for computer controlling.
PC control and data processing system Waveform include sine, half sine, triangle wave, rectangle wave, random wave and user-defined wave.
