Theoretical modeling and analysis for laser shock tensioning process of circular saw blade

Abstract

It needs an extremely large number of elements for a relatively accurate finite element simulation of laser shock tensioning process of circular saw blade, which results in extremely low computational efficiency. It is important to analyze and understand the evolution rule of circular saw blade's dynamic characteristics after laser shock tensioning process. Therefore, for a more systematic study of laser shock tensioning process, a theoretical model for tensioning stress field and natural frequency was built based on finite element method, reasonable simplifications and assumptions. By comparing theoretical analysis and measured results, the theoretical model was proved to be correct. Theoretical analysis results show that beneficial tangential tensile tensioning stress with a certain value is produced in the outer edge of circular saw blade after laser shock tensioning process. Natural frequencies of circular saw blade for nodal circle Nc = 0 and nodal diameter Nd ≥ 2 are increased obviously with impact zone radius and peak pressure of laser shock wave, which means that the dynamic stability of circular saw blade is improved after laser shock tensioning process.