Modeling the strain localization of shell elements subjected to combined stretch–bend loads: Application on automotive sheet metal stamping simulations

Tuan Pham, QuocBlekinge Tekniska Högskola,Institutionen för maskinteknik (author)

Modeling the strain localization of shell elements subjected to combined stretch–bend loads : Application on automotive sheet metal stamping simulations

The authors gratefully acknowledge the financial support from VINNOVA in the Sustainable Production subprogram within Vehicle Strategic Research and Innovation (FFI) program, Sweden(grant number 2020-02986) and KK-Stiftelsen, Sweden (grant number 20200125). Open Access funding was provided by the Blekinge Institute of Technology, Sweden .
This study presents a modeling approach for predicting strain localization during sheet metal stamping processes focused on automotive engineering applications. The so-called stretching-to-bending ratio, ρ, is proposed to characterize the loading conditions acting on an element during stamping processes. Then, localized strain or necking strain is suggested to be a function of ρ. Different stretch–bending tests with different tool radii, i.e., R3, R6, R10, and R50 are conducted for two automotive sheet metals, DP800 and AA6010, to identify their forming limits under combined stretch–bend loads. The calibrated necking limit curve of the AA6016 sheet is then employed in AutoForm R10 software to predict the necking and failure of a stamped panel. Agreement with the experimental observation of failure positions of the panel validates the usefulness of the proposed modeling approach in practice.

Islam, Md. Shafiqul,1984-Blekinge Tekniska Högskola,Institutionen för maskinteknik(Swepub:bth)MDM (author)
Barlo, Alexander,M.Sc. Eng.1994-Blekinge Tekniska Högskola,Institutionen för maskinteknik(Swepub:bth)acb (author)
Sigvant, MatsBlekinge Tekniska Högskola,Institutionen för maskinteknik(Swepub:bth)MXS (author)
Pérez Caro, Lluís,1985-RISE,Tillverkningsprocesser,RISE Research Institutes of Sweden(Swepub:ri)lluispe@ri.se (author)
Trana, KristofferVolvo Cars, Olofström, Sweden (author)
Blekinge Tekniska HögskolaInstitutionen för maskinteknik (creator_code:org_t)

By the author/editor: Tuan Pham, Quoc; Islam, Md. Shafi ...; Barlo, Alexander ...; Sigvant, Mats; Pérez Caro, Lluí ...; Trana, Kristoffe ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Applied Mechanic ...

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