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Strain and stress conditions at crack initiation during shearing of medium- and high-strength steel sheet
Högskolan Dalarna, Akademin Industri och samhälle, Materialteknik.ORCID-id: 0000-0001-7535-5250
Luleå University of Technology.
Högskolan Dalarna, Akademin Industri och samhälle, Materialteknik.
Luleå University of Technology.
2017 (engelsk)Inngår i: International Journal of Mechanical and Materials Engineering, ISSN 2198-2791, Vol. 12, nr 1, s. 10-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Strain and stress conditions in sheet metal shearing are of interest for calibration of various fracture criteria. Most fracture criterion are governed by effective strain and stress triaxiality. This work is an attempt to extend previous measurements of strain fields in shearing of steel sheets with the stress state calculated from the measured displacement fields. Results are presented in terms of von Mises stress and stress triaxiality fields, and a comparison was made with finite element simulations. Also an evaluation of the similarities of the stress conditions on the sheet surface and inside the bulk material were presented. Strains and von Mises stresses were similar on the surface and the bulk material, but the stress triaxiality was not comparable. There were large gradients in strain and stress around the curved tool profiles that made the results resolution dependent and comparisons of maximum strain and stress values difficult. The stress state on the sheet surface calculated from displacement field measurements is still useful for validation of a three dimensional finite element model.

sted, utgiver, år, opplag, sider
Springer, 2017. Vol. 12, nr 1, s. 10-
Emneord [en]
sheet metal, experiment, shearing, strain, stress, crack initiation
HSV kategori
Forskningsprogram
Stålformning och ytteknik, Simulering av klippning i höghållfast stål
Identifikatorer
URN: urn:nbn:se:du-24583DOI: 10.1186/s40712-017-0075-5OAI: oai:DiVA.org:du-24583DiVA, id: diva2:1081364
Tilgjengelig fra: 2017-03-14 Laget: 2017-03-14 Sist oppdatert: 2017-03-14bibliografisk kontrollert

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