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Hydroforming

About: Hydroforming is a research topic. Over the lifetime, 2796 publications have been published within this topic receiving 26293 citations. The topic is also known as: Bulge forming.


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Journal ArticleDOI
TL;DR: In this article, an extended stress-based forming limit curve (XSFLC) was used to predict the onset of necking in sheet metal loaded under non-proportional load paths, as well as under three-dimensional stress states.
Abstract: This paper presents an extended stress-based forming limit curve (XSFLC) that can be used to predict the onset of necking in sheet metal loaded under non-proportional load paths, as well as under three-dimensional stress states. The conventional strain-based eFLC is transformed into the stress-based FLC advanced by Stoughton (1999, Int. J. Mech. Sci., 42, pp. 1-27). This, in turn, is converted into the XSFLC, which is characterized by the two invariants, mean stress and equivalent stress. Assuming that the stress states at the onset of necking under plane stress loading are equivalent to those under three-dimensional loading, the XSFLC is used in conjunction with finite element computations to predict the onset of necking during tubular hydroforming. Hydroforming of straight and pre-bent tubes of EN-AW 5018 aluminum alloy and DP 600 steel are considered. Experiments carried out with these geometries and alloys are described and modeled using finite element computations. These computations, in conjunction with the XSFLC, allow quantitative predictions of necking pressures; and these predictions are found to agree to within 10% of the experimentally obtained necking pressures. The computations also provide a prediction of final failure location with remarkable accuracy. In some cases, the predictions using the XSFLC show some discrepancies when compared with the experimental results, and this paper addresses potential causes for these discrepancies. Potential improvements to the framework of the XSFLC are also discussed.

47 citations

Journal ArticleDOI
TL;DR: In this article, two model tests to evaluate lubricant performance under realistic tribological conditions occurring in the transition and expansion zones of a tube hydroforming (THF) process are presented.

46 citations

Journal ArticleDOI
TL;DR: In this article, the effect of different material parameters, such as the r-value and the n-value, on the hydroformability of tubes is discussed and a ranking of different grades based on this model is proposed.

46 citations

Journal ArticleDOI
TL;DR: In this article, a material model which accurately describes the anisotropic behavior of aluminum tubes can be obtained from simple and robust experiments, which accentuates the need for improved constitutive models.

45 citations

Journal ArticleDOI
TL;DR: In this paper, the application of viscous pressure forming (VPF) to the forming of a non-symmetric part from steel, aluminum and a nickel alloy is described.

45 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202330
202298
202158
202087
201981
201895