Speaker
Quoc Tuan Pham
(Department of Mechanical Engineering, Blekinge Institute of Technology, Karlskrona, Sweden)
Description
In sheet metal stamping, the occurrence of strain localization in a deformed sheet is considered the failure. As so, the formability of a sheet metal is conventionally evaluated by using the forming limit diagram. This study presents an evaluation method for detecting the strain localization during experiment based on the digital image correlation. The strain-field distribution on the surface of the deformed specimens is captured by a commercial software ARAMIS. A detail analysis of the proposed method is presented considering uniaxial tensile and Nakazima tests conducted for two automotive sheet metals AA6016 and DP800. Compared to the ISO standard method, the proposed method presents lower forming limits for both investigated materials.
Authors
Quoc Tuan Pham
(Department of Mechanical Engineering, Blekinge Institute of Technology, Karlskrona, Sweden)
Dr
Md Shafiqul Islam
(Blekinge Institute of Technology)
Alexander Barlo
(Blekinge Institute of Technology)
Mats Sigvant
(Volvo Cars)