Delayed fracture characteristic evaluation method, delayed fracture prediction method, program, press-formed article production method, and shearing device

A shearing device for performing shearing on a metal sheet to prepare a test piece to evaluate a delayed fracture characteristic, the shearing device comprising:

• a lower die including a lower blade provided in a shoulder portion of the lower die;
• a sheet presser;
• and
• an upper die including an upper blade provided in a shoulder portion of the upper die, wherein:
• the shearing device is configured to shear the metal sheet by the lower blade and the upper blade with the metal sheet being restrained by the lower die and the sheet presser;
• and
• the shearing device further comprises a spacer inserted between the metal sheet and the sheet presser.

A shearing device for performing shearing on a metal sheet to prepare a test piece to evaluate a delayed fracture characteristic, the shearing device comprising:

• a lower die including a lower blade provided in a shoulder portion of the lower die;
• a sheet presser;
• and
• an upper die including an upper blade provided in a shoulder portion of the upper die, wherein:
• the shearing device is configured to shear the metal sheet by the lower blade and the upper blade with the metal sheet being restrained by the lower die and the sheet presser;
• the shearing device further comprises a spacer inserted between the lower die and the sheet presser at a position where the spacer does not make contact with the metal sheet;
• and
• the spacer has a thickness thicker than a thickness of the metal sheet.

A shearing device for performing shearing on a metal sheet to prepare a test piece to evaluate a delayed fracture characteristic, the shearing device comprising:

• a lower die including a lower blade provided in a shoulder portion of the lower die;
• a sheet presser;
• and
• an upper die including an upper blade provided in a shoulder portion of the upper die, wherein:
• the shearing device is configured to shear the metal sheet by the lower blade and the upper blade with the metal sheet being restrained by the lower die and the sheet presser;
• and
• the shearing device further comprises a spacer inserted between the metal sheet and the lower die.