Improved clamping mechanism of fatigue testing machine for in-situ imaging of synchronous radiation light source

The invention discloses an improved clamping mechanism of a fatigue testing machine for in-situ imaging of a synchronous radiation light source, which is arranged on a platform cylindrical base of the synchronous radiation light source. The improved clamping mechanism comprises a sample clamping unit and a plastic deformation additional adjusting unit, wherein the sample clamping unit is vertically arranged along the axle wire of the base of the fatigue testing machine and is divided into two parts of a lower clamping head section and an upper clamping head section, and the upper clamping head section is provided with the plastic deformation additional adjusting unit. Compared with a fatigue testing machine in the previous generation, the improved clamping mechanism of the fatigue testing machine for the in-situ imaging of the synchronous radiation light source, disclosed by the invention, is further improved, and the properties of buffer vibration attenuation and noise reduction of a system are increased; on the premise that load is fully enabled to be applied to a sample, the integral bearing performance of the fatigue testing machine is ensured; the plastic deformation additional adjusting unit can be used for adjusting the size of an applied force after plastic deformation of the sample happens in compaison with the fatigue testing machine in the previous generation, detailed problems in a test implementing process are more detailedly considered.