PRESS FORMING CRACK DETERMINATION METHOD, PRESS FORMING CRACK DETERMINATION APPARATUS, AND PRESS FORMING CRACK DETERMINATION PROGRAM, AND PRESS FORMING CRACK SUPPRESSING METHOD

PRESS FORMING CRACK DETERMINATION METHOD, PRESS FORMING CRACK DETERMINATION APPARATUS, AND PRESS FORMING CRACK DETERMINATION PROGRAM, AND PRESS FORMING CRACK SUPPRESSING METHOD

A press forming fracture determination method according to the present invention is used to determine the presence or absence of fracture occurrence in a portion of the metal sheet in which a deformation path changes from compressive deformation to tensile deformation in press forming on the metal s...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SATO, Kentaro, KARIYAZAKI, Yuta
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PHYSICS
PUNCHING METAL
TESTING
TRANSPORTING
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:A press forming fracture determination method according to the present invention is used to determine the presence or absence of fracture occurrence in a portion of the metal sheet in which a deformation path changes from compressive deformation to tensile deformation in press forming on the metal sheet, and includes: a step (S10) of deriving a forming limit condition related to fracture occurrence in the metal sheet based on a basic forming test in which a metal sheet is deformed in a deformation path that changes from compressive deformation to tensile deformation and FEM analysis therefor; and a step (S20) of determining the presence or absence of fracture occurrence in a portion in which the deformation path changes from compressive deformation to tensile deformation in the press forming on the metal sheet based on the derived forming limit condition.