This paper deals with the friction-type joints using F10T,M16 high-strength bolts. To clarify the hysteresis characteristics under overstress, the monotonic tensile tests (T Series), the monotonic tensile tests (DT Series) after the dynamic tests under a constant-amplitude stress-cycling condition and the dynamic tests (D Series) under a constant-amplitude strain-cycling were conducted. The test parameter are the magnitude of the initial clamping force, the loading amplitude and the rate of the slip strength to the yield strength of the joint. The slip strength, the effect of the friction force in the joint behavior and the fracture mode are discussed. And then the relationship between the slip strength of the joints and the yield strength of the connected member, the fluctuation characteristics of slip strength and the bolt tension are investigated.
