Welding stress elimination

For the high-rise buildings, the component of the residual stress in particular the control of welding residual stresses is quite strict, the welding process of welding residual stress and stress will reduce the capacity and lifetime of the structure, but also the direct cause of cracks caused. After completion of the processing components must adopt appropriate measures to eliminate stress, while the economic costs are very high, the mechanical properties of the component will have a greater damage.

VSR substantive principle is based on mechanical vibration modes impose additional stress on the workpiece, when the additional stress and residual stress superimposed upon the total stress reaches or exceeds a certain value, the stress concentration at the site of more than metallic material yield strength occurs within the workpiece macroscopic and microscopic plastic deformation - Bauschinger effect, thereby reducing the residual stress of the peak point, the stress uniform, improved resistance to deformation of metals. Meanwhile, the dynamic stress and vibration superposition of macroscopic residual stress, combined stress caused yield greater than the elastic limit, the high stress drop, stress uniformity, improved dimensional stability. Particularly in the stress concentration are likely to form a larger tensile stress yield zone, formed after the stress unloading stress protected areas, improve the stability of the structure; early in the VSR effect plays a major role in this.