منابع مشابه
Mechanism of Improvement of Formability in Pulsating Hydroforming of T-shape Tubes
In this paper, the mechanism of improvement of formability in pulsating hydroforming of T-shape tubes is investigated by the finite element simulation and experiment. It is shown that local thinning was prevented by oscillating the internal pressure, because the protrusion is formed gradually by the prevention of sharp bulging. In the hydroforming, for the pulsating pressure, several steps occu...
متن کاملSimultaneous hydroforming of bulge- and T-zone in 304 stainless steel and 70/30 brass tubes
Hydroforming process is largely used for the production of tubular parts in various industries, and has advantages such as less weight, higher quality, more strength and fewer production cost compared to the conventional methods of production. The aim of this study is forming a tube-shaped part with a special geometry that has both bulge- and T-zones with tube hydroforming process. The forming ...
متن کاملReview Heat Exchanger: Research Development of Self-rotating Inserts in Heat Exchanger Tubes
Heat exchangers are widely used in power engineering and industrial applications, many techniques such as coiled tube, surface tension devices, rough surfaces, extended surfaces have been investigated to enhancethermal performance and to minimize the cost and size of the heat exchanger equipment. One of the most important techniques is tube insert. In general,tube inserts can be classified into...
متن کاملLocally Anisotropic Wormholes and Flux Tubes in 5D Gravity
In this article we examine a class of wormhole and flux tube like solutions to 5D vacuum Einstein equations. These solutions possess generic local anisotropy, and their local isotropic limit is shown to be conformally equivalent to the spherically symmetric 5D solutions of Ref. [1]. The local anisotropy of these solutions is modeled using the technique of anholonomic frames with respect to whic...
متن کاملDistributed MPC: Guaranteeing Global Stabilizability from Locally Designed Tubes
This paper studies a fundamental relation that exists between stabilizability assumptions usually employed in distributed model predictive control implementations, and the corresponding notions of invariance implicit in such controllers. The relation is made explicit in the form of a theorem that presents sufficient conditions for global stabilizability. It is shown that constraint admissibilit...
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ژورنال
عنوان ژورنال: Journal of Manufacturing Processes
سال: 2014
ISSN: 1526-6125
DOI: 10.1016/j.jmapro.2014.01.002