Abstract
The ductile fracture behavior of Ti-6Al-4V is investigated experimentally. The objective of the test program is to generate experimental data that can be used to calibrate a failure model for numerical simulations. Various stress states are achieved by conducting mechanical tests on multiple sample geometries subjected to several different loading conditions. Tension tests are conducted on thin flat specimens, thick flat specimens and axisymmetric specimens with varying notch radii. In addition, thin walled tube specimens are subjected to combined axial-torsional loading. Digital image correlation is used to measure specimen surface strain for all experiments. Parallel LS-DYNA simulations are used to determine the stress states and fracture strains for tension tests. A fracture locus for Ti-6Al-4V is created in the stress triaxiality and Lode parameter stress space. The results show that the stress triaxiality alone is unable to properly capture the failure characteristics Ti-6Al-4V.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
Dodd B, Bai Y (1987) Ductile fracture and ductility with applications to metalworking. Harcourt Brace Jovanovich Publishers, London
Johnson GR, Cook WH (1985) Fracture characteristics of three metals subjected to various strains, strain rates, temperatures, and pressures. Eng Fract Mech 21(1):31–48
Bau Y, Wierzbicki T (2004) On fracture locus in the equivalent strain and stress triaxiality space. Int J Mech Sci 46:81–98
Barsoum I, Faleskog J (2007) Rupture mechanics in combined tension and shear experiments. Int J Solids Struct 44:1768–1786
Xue L (2007) Damage accumulation and fracture initiation in uncracked ductile solids subjected to triaxial loading. Int J Solids Struct 44:5163–5181
Seidt JD (2010) Plastic deformation and ductile fracture of 2024-T351 aluminum under various loading conditions. Ph.D. dissertation, The Ohio State University
Hammer JT, (2012) Plastic deformation and fracture of Ti-6Al-4V under various loading conditions. M.Sc. thesis, The Ohio State University
Acknowledgements
The research was supported by the U.S.A. Federal Aviation Administration. The authors would like to thank William Emmerling, Donald Altobelli and Chip Queitzsch of the FAA.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 The Society for Experimental Mechanics
About this paper
Cite this paper
Hammer, J.T., Seidt, J.D., Gilat, A. (2014). Influence of Stress State on the Ductile Fracture of Ti-6Al-4V. In: Jay, C. (eds) Fracture and Fatigue, Volume 7. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00765-6_13
Download citation
DOI: https://doi.org/10.1007/978-3-319-00765-6_13
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-00764-9
Online ISBN: 978-3-319-00765-6
eBook Packages: EngineeringEngineering (R0)