METHOD FOR SETTING BOUNDARY CONDITION FOR SIMULATION OF HOT-PRESS-FORMING

PROBLEM TO BE SOLVED: To provide a method for setting the boundary condition for the simulation of hot-press-forming which can universally improve the accuracy of temperature calculation and formability prediction without remarkably reducing element sizes by correcting the thermal contact condition in calculation to conform to a real phenomenon. SOLUTION: In the simulation of hot-press-forming in which structural analysis based on a finite element method is linked with heat transfer analysis, a method for setting the boundary condition for the simulation of hot-press-forming is characterized in that, in the die surface within the region contacting with the blank, the heat transfer boundary condition between a projection-contoured part and a blank surface, and the heat transfer boundary condition between flat-contoured and concave-contoured parts and the blank surface are divided, and also, a thermal contact determining distance between the projection-contoured part and the blank surface is larger than a thermal contact determining distance between flat-contoured and concave-contoured parts and the blank surface. COPYRIGHT: (C)2010,JPO&INPIT