Evaluation method and evaluation apparatus for spot welded portion
US7543732B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2004 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Dec 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0296
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A technique for evaluation of the strength of a spot welded portion of a panel is provided. A stress value at the welded portion of the panel is calculated by a stress analysis according to a FEM using the elements, and then the strength of the welded portion is evaluated based on the stress value at the welded portion. A portion in the proximity of the spot welded portion is divided, with a central portion of the spot welded portion registered with a nodal point of the elements, into a central element and plural concentric ring-like elements from the center side provided by the central portion of the spot welded portion. Thereafter, the plural concentric ring-like elements are individually divided in a circumferential direction each into a plurality of portions to form the elements. Then, the strength is evaluated based on the stress value of the second ring-like element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.