Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Damage and fracture during sheet-metal forming of alloy 718
RISE - Research Institutes of Sweden, Materials and Production, IVF. Luleå University of Technology, Sweden.ORCID iD: 0000-0002-1432-444x
DYNAmore Nordic AB, Sweden.
Acoustic Agree AB, Sweden.
RISE - Research Institutes of Sweden, Materials and Production, IVF. Luleå University of Technology, Sweden.
Show others and affiliations
2019 (English)In: International Journal of Material Forming, ISSN 1960-6206, E-ISSN 1960-6214Article in journal (Refereed) Epub ahead of print
Abstract [en]

Forming nickel-based superalloy aero-engine components is a challenging process, largely because of the risk of high degree of springback and issues with formability. In the forming tests conducted on alloy 718 at room temperature, open fractures are observed in the drawbead regions, which are not predicted while evaluating the formability using the traditional forming-limit diagram (FLD). This highlights the importance of an accurate prediction of failure during forming as, in some cases, may severely influence the springback and thereby the accuracy of the predicted shape distortions, leading the final shape of the formed component out of tolerance. In this study, the generalised incremental stress-state dependent damage model (GISSMO) is coupled with the isotropic von Mises and the anisotropic Barlat Yld2000-2D yield criteria to predict the material failure in the forming simulations conducted on alloy 718 using LS-DYNA. Their effect on the predicted effective plastic strains and shape deviations is discussed. The failure and instability strains needed to calibrate the GISSMO are directly obtained from digital image correlation (DIC) measurements in four different specimen geometries i.e. tensile, plane strain, shear, and biaxial. The damage distribution over the drawbeads is measured using a non-linear acoustic technique for validation purposes. The numerical simulations accurately predict failure at the same regions as those observed in the experimental forming tests. The expected distribution of the damage over the drawbeads is in accordance with the experimental measurements. The results highlight the potential of considering DIC to calibrate the GISSMO in combination with an anisotropic material model for forming simulations in alloy 718.

Place, publisher, year, edition, pages
2019.
Keywords [en]
Alloy 718, Damage, Fracture, GISSMO, Non-linear acoustic technique, Optimisation, Aircraft engines, Anisotropy, Forecasting, Metal forming, Nickel alloys, Sheet metal, Strain, Non-linear acoustics, Optimisations, Drawing (forming)
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-37015DOI: 10.1007/s12289-018-01461-4Scopus ID: 2-s2.0-85059526587OAI: oai:DiVA.org:ri-37015DiVA, id: diva2:1280959
Available from: 2019-01-21 Created: 2019-01-21 Last updated: 2019-06-28Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Perez Caro, Lluis

Search in DiVA

By author/editor
Perez Caro, Lluis
By organisation
IVF
In the same journal
International Journal of Material Forming
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 7 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.7