| 摘要 |
PROBLEM 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. SOLUTION: The coefficient of frictionμof a metal sheet is calculated according to a polynomial approximate expression, using one or two or more kinds of: surface pressure: P<SB>N</SB>[Pa], friction workload:ω[N/m], molding speed: S[m/s], relative hardness difference with respect to a tool:ΔH[kg/m<SP>2</SP>], roughness of a workpiece material: R<SB>a</SB>[m], viscosity of lubricating oil:υ[Pa s], plastic strain:ε<SB>P</SB>, temperature: T[°C], shearing resistance force of the surface layer of the material to be processed:τ<SB>s</SB>[Pa], and diameter of abrasion powder: r<SB>w</SB>[m]. Further, molding simulation by finite-element method is carried out by using the coefficient of frictionμ. COPYRIGHT: (C)2005,JPO&NCIPI
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