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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/92304
- Title
- A new approach for failure criterion for sheet metals
- Author(s)
- Stoughton, Thomas B.; Yoon, Jeong Whan
- Abstract
- The interpretation of sheet forming simulations relies on failure criteria to define the limits of metal deformation. The common requirements for these criteria across a broad range of application areas have not yet been satisfied or fully identified, and a single criterion to satisfy all needs has not been developed. Areas where existing criteria appear to be lacking are in the comprehension of the effects of non-proportional loading, general non-planar and triaxial stress loading, and process and material mechanisms that differentiate between necking and fracture. This study was mainly motivated to provide an efficient method for the analysis of necking and fracture limits for sheet metals. In this paper, a model for the necking limit is combined with a model for the fracture limit in the principal stress space by employing a stress-based forming limit curve (FLC) and the maximum shear stress (MSS) criterion. A new metal failure criterion for in-plane isotropic metals is described, based on and validated by a set of critical experiments. This criterion also takes into consideration of the stress distribution through the thickness of the sheet metal to identify the mode of failure, including localized necking prior to fracture, surface cracking, and through-thickness fracture, with or without a preceding neck. The fracture model is also applied to the openability of a food can for AA 5182. The predicted results show very good agreement with the experimentally observed data.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences
- Source
- International Journal of Plasticity, Vol. 27, no. 3 (Mar 2011), pp. 440-459
- Publication year
- 2011
- FOR Code(s)
- 0905 Civil Engineering; 0912 Materials Engineering; 0913 Mechanical Engineering
- Keyword(s)
- Finite element modeling; FLC; Formability; Forming limit curve; Fractures; Necking limit; Stress-based FLC
- Publisher
- Pergamon
- ISSN
- 0749-6419
- Publisher URL
- http://dx.doi.org/10.1016/j.ijplas.2010.07.004
- Copyright
- Copyright © 2010 Elsevier.
- Peer reviewed
