Details

Autor(en) / Beteiligte

• Hong, J-H
• Kim, D

Titel

Equivalence between Localization Criteria and Fracture Criteria as Forming Limit in Failure Evaluation for 7xxx Series Aluminum Alloy Sheets

Ist Teil von

• IOP conference series. Materials Science and Engineering, 2021-06, Vol.1157 (1), p.12057

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2021

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• Abstract The equivalence between the localization criteria and the fracture criteria was validated as a forming limit for the proper prediction of failure induced by severe strain localization in the two-step hybrid forming process of 7xxx series aluminum alloy sheets at the elevated temperature. In the previous researches, an extensive and systematic method combined with sophisticated material characterization had been revisited as the localization criterion to estimate the onset of the failure without any fracture criteria. As for the fracture criteria, a deformation path and effective strain-rate sensitive fracture criterion was utilized. In the event of failure occurrence with abrupt strain localization, which has been traditionally known as the localization criteria dominant case, the fracture criteria can replace the localization criteria as a forming limit.