METHOD FOR CALCULATING COEFFICIENT OF FRICTION OF METALLIC MATERIAL, AND MOLDING SIMULATION METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a method for calculating the coefficient of friction of a metallic material for further enhancing analyzing precision in performing the molding simulation of the metal material, changed in the coefficient of friction during a molding process represented by a surface-treated steel sheet or the like, and to provide a molding simulation method. PSOLUTION: The coefficient of friction of a metal sheet is calculated according to a polynomial approximate expression, using one or two or more kinds of: surface pressure: PSBN/SB[Pa], friction workload: [N/m], molding speed: S[m/s], relative hardness difference with respect to a tool: H[kg/mSP2/SP], roughness of a workpiece material: RSBa/SB[m], viscosity of lubricating oil: [Pa s], plastic strain: SBP/SB, temperature: T[C], shearing resistance force of the surface layer of the material to be processed: SBs/SB[Pa], and diameter of abrasion powder: rSBw/SB[m]. Further, molding simulation by finite-element method is carried out by using the coefficient of friction . PCOPYRIGHT: (C)2005,JPO&NCIPI