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Stress-Based Forming Limits in Sheet Metal Forming
Manufacturing Engineering, 2000Abstract A strain-based forming limit criterion is widely used throughout the sheet metal forming industry to gauge the stability of the deformed material with respect to the development of a localized neck prior to fracture. This criterion is strictly valid only when the strain path is linear throughout the deformation process. There is
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Characterizing fracture forming limit and shear fracture forming limit for sheet metals
Journal of Materials Processing Technology, 2018Abstract This article investigates, experimentally, the failure loci in transition region between failure by crack-opening by mode I and by mode II of fracture mechanics. This investigation determines the fracture forming limit (FFL) and the shear fracture forming limit (SFFL) for copper with 0.8 mm and brass with 1 mm of thickness, by means of ...
Kishore Jawale +3 more
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Generalised forming limit diagrams showing increased forming limits with non-planar stress states
International Journal of Plasticity, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Allwood, Julian M., Shouler, Daniel R.
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Forming Limit Curves and Forming Limit Stress Curves for Advanced High Strength Steels
Materials Science Forum, 2013Experimental and numerical investigations using Forming Limit Curve (FLC) and Forming Limit Stress Curve (FLSC) were carried out for two Advanced High Strength Steel (AHSS) grades DP780 and TRIP780. The forming limit curves were experimentally determined by means of Nakazima stretching test.
Sansot Panich +4 more
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1969
In this chapter we initially explain why the limited company is such a popular organisation and the steps that have to be taken to convert a business into a company. There then follows an examination of how to attract the financial support of a larger section of the community and finally we consider the different forms in which this support could be ...
Kenneth Midgley, Ronald G. Burns
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In this chapter we initially explain why the limited company is such a popular organisation and the steps that have to be taken to convert a business into a company. There then follows an examination of how to attract the financial support of a larger section of the community and finally we consider the different forms in which this support could be ...
Kenneth Midgley, Ronald G. Burns
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Analysis of forming limits in metal forming processes
Journal of Materials Processing Technology, 2008Forming limit plays a very important role in metal forming processes since it can be used to predict whether a blank will fracture or not. This paper examines the influence on forming limit of blank and fractured thickness. The fractured thickness of a specimen in the simple tension test is adopted as the fracture criterion of the forming limit, and is
Huang, You-Min +2 more
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Non-Traditional Forming Limit Diagrams for Incremental Forming
Advanced Materials Research, 2005Although not standard, Forming Limit Diagrams, FLD’s, are used throughout the automotive industry as a preliminary tool to determine if a sheet metal forming process is capable of forming a good part. FLD’s show a limited range of strains on the diagram; typically the range is 0 to 1 on the major strain axis.
J. Jeswiet, David J. Young, M. Ham
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Soviet Studies in Literature, 1970
I should like to speak somewhat more sharply about the modern story. It is easy enough to show indignation, take me by the hand, and point to the quality of a few, shall we say, remarkable stories that have appeared recently. But I am deliberately exaggerating when I assert that the story today is inadequate and untenable.
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I should like to speak somewhat more sharply about the modern story. It is easy enough to show indignation, take me by the hand, and point to the quality of a few, shall we say, remarkable stories that have appeared recently. But I am deliberately exaggerating when I assert that the story today is inadequate and untenable.
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Forming limit analysis of hemispherical-punch stretch forming
Journal of Materials Processing Technology, 2001Abstract This paper combines elastic–plastic membrane finite elements and forming limit theory to determine the limiting dome height of axisymmetric stretch forming. The elastic–plastic finite element approach is based on the flow rule associated with Hill’s quadratic yield criterion for anisotropic material.
Tung-Sheng Yang, Tze-Chi Hsu
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2004
In this work, the Marciniak and Kuczynski model (MK) will be reviewed and will be generalized to a more general approach for the calculation of forming limit diagrams. In the new model we will account for all directions of the imperfection. This new approach has been used to calculate the theoretical FLDs (forming limit diagrams) for Vonmises, Barlat ...
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In this work, the Marciniak and Kuczynski model (MK) will be reviewed and will be generalized to a more general approach for the calculation of forming limit diagrams. In the new model we will account for all directions of the imperfection. This new approach has been used to calculate the theoretical FLDs (forming limit diagrams) for Vonmises, Barlat ...
openaire +1 more source