Metal sheet bending fracture determination method and recording medium
US9874504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2014 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Jul 15, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2119/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A bending fracture limit stress is calculated for each of (bend radius at sheet thickness center of a metal sheet)/(initial sheet thickness of the metal sheet); a fracture limit curve and a fracture limit stress are calculated from work hardening characteristics; a fracture limit curve corresponding to (the metal sheet bend radius at sheet thickness center)/(the initial sheet thickness of the metal sheet) is calculated; a corresponding fracture limit stress is calculated from stress of the element subject to determination and the fracture limit curve; a risk ratio that is a ratio between the stress of the element subject to determination and the fracture limit stress is computed; and performing fracture determination for the element subject to determination based on the risk ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.