FEM BASED PROCESS DESIGN FOR LASER FORMING OF DOUBLY CURVED SHAPES

摘要

This study presents a finite element method (FEM) based three-dimensional laser forming process design methodology for thin plates with consideration of bending strain to determine the laser scanning paths and heating conditions. The strain fields were first calculated via elastic large deformation FEM model. The laser scanning paths were chosen perpendicular to the averaged principal minimum strain direction. The ratios of in-plane and bending strain were calculated to help determine the heating conditions. A typical doubly curved shape, pillow shape, was studied and the overall methodology was validated by experiments.