Calibration of a damage and fracture model for alloy 718
2016 (English)In: Advancements in Theoretical and Applied Plasticity: Proceedings of PLASTICITY ’16: The Twenty Second International Symposium on Plasticity and its Current Applications / [ed] Akhtar S. Khan, Fulton, Maryland 20759-0591, USA: NEAT PRESS , 2016, 223-225 p.Conference paper (Refereed)
Nickel-based superalloys are primarily used in the hot sections of aircraft engines because they can maintain their mechanical properties and chemical stabilities at high temperatures under severe corrosive environments i.e. for a long time. In order to simulate forming procedures in Alloy 718 sheets, the GISSMO damage and failure model is coupled with both isotropic von Mises and anisotropic Barlat YLD2000 material models in the finite element code LS-DYNA. In this study, the calibration of the GISSMO model for forming simulations at room temperature is discussed. The calibration requires failure strains for different stress states as a function of triaxiality, which are obtained by testing six different specimen geometries up to fracture. Numerical predictions will be compared with experimental observations from forming tests.
Place, publisher, year, edition, pages
Fulton, Maryland 20759-0591, USA: NEAT PRESS , 2016. 223-225 p.
damage, fracture, nickel-based superalloys, Alloy 718, forming, GISSMO
Metallurgy and Metallic Materials Applied Mechanics
Research subject Solid Mechanics
IdentifiersURN: urn:nbn:se:ltu:diva-62818ISBN: 978-0-9911654-7-6 (electronic)OAI: oai:DiVA.org:ltu-62818DiVA: diva2:1087053
22nd International Symposium on Plasticity and Its Current Applications, (Plasticity 2016), Kona, Hawaii, January 3-9, 2016
ProjectsNFFP6 - Virtuell processkedja för plåtformade flygmotorstrukturer i superlegeringar – Validering och demonstrator