木工圆锯片激光冲击适张原理及理论验证

Principle and theoretical verification for laser shock tensioning process of woodworking circular saw blade

提出了一种木工圆锯片适张方法—激光冲击适张方法,利用强激光束产生的高压等离子体冲击波作用于锯片局部区域,使其产生局部塑性变形进而生成适张应力场,产生适张效果。本文应用ABAQUS有限元分析软件中的Dynamic/Explicit显式动力学求解模块建立了圆锯片激光冲击适张的加载过程仿真模型,结合Static/General静力隐式求解模块分析了激光冲击适张后圆锯片的弹性卸载过程,最终获得了圆锯片内部的适张应力场。仿真分析结果表明:激光冲击适张方法能够使圆锯片内部产生有益的适张应力场,通过调整冲击次数、冲击区域分布等参数,能够获得最优的适张效果。

Laser shock tensioning method is proposed for woodworking circular saw blade in this paper. The high pressure plasma shock wave generated by the strong laser beam is applied to the local areas of circular saw blade and local plastic deformation is produced to the saw blade. And then the pre-stress field is generated in the saw blade with the tensioning effect. The laser shock tensioning process of circular saw blade is built by Dynamic/Explicit solving module of ABAQUS software. The uninstall process of circular saw blade after tensioning is built by Static/General solving module of ABAQUS software. Tensioning stress of circular saw blade after laser shock tensioning process is obtained. Simulation results show that beneficial tensioning stress field is produced in circular saw blade by laser shock tensioning. Optimized tensioning effect of circular saw blade can be obtained by adjusting the laser shock number and distribution of laser shock zones.