Abstract：By shifting the mean stress and the sine wave stress amplitude，uniaxial cyclic experiments were performed to study the dynamic response of fluid-saturated sandstones and marbles. The experimental results show that the modulus increases as the mean stress increases. As the mean stress increases，the Poisson¢s ratio increases at first，and then decreases. The area of hysteresis loop decreases，and the attenuation decreases too. When shifting both the mean stress and the dynamic stress amplitude，the influence on dynamic response is the most intensive. The influence on dynamic response by shifting only the dynamic stress amplitude and remaining the mean stress unchanged is also very intensive. The influence on dynamic response by shifting only the mean stress is not much intensive. Stress corrosion on surrounding media has been discussed. Because of the stress corrosion of water，the attenuation of water-saturated sandstones is twice as that of oil-saturated sandstones；and the dynamic response of water-saturated sandstones is clearer than that of oil-saturated sandstones. Because marbles are more compacted than sandstones and the porosity is only about 1%，the stress corrosion is more serious in sandstones than that in marble. This research is very significant to the alleviation and control of seismic and geological disasters.
