Topic
Bend radius
About: Bend radius is a research topic. Over the lifetime, 3303 publications have been published within this topic receiving 35415 citations. The topic is also known as: minimum bend radius.
Papers published on a yearly basis
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TL;DR: In this paper, the secondary flow in a bend in which the radius of curvature is repeatedly reversed is analyzed by assuming the centre line of the bend is a sine curve.
Abstract: Secondary vorticity in the direction of flow is developed after fluid with a non-uniform velocity passes through a bend. The secondary flow may be increased or decreased by reversal of the radius of curvature of the bend, depending on the location of the reversal. The general behaviour of the secondary flow in a bend in which the radius of curvature is repeatedly reversed is analyzed by assuming the centre line of the bend is a sine curve. The resulting differential equation describing the flow is non-linear, and a variety of solutions are obtained for different entry conditions. These solutions are compared with experimental results obtained from observations of the air flow through various configurations of pipe.
10 citations
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TL;DR: In this article, the flexforming process is modeled by finite element method in order to investigate the operation window of the problem and various models are established using explicit approach for the forming operation and implicit approach for unloading one.
Abstract: In this paper, the flexforming process is modeled by finite element method in order to investigate the operation window of the problem. Various models are established using explicit approach for the forming operation and implicit approach for the unloading one. In all analyses the rubber diaphragm has been modeled revealing that the modeling of this diaphragm is essential. Using the material Aluminum 2024 T3 alclad sheet alloy, three basic experiments are conducted: Bending of a straight flange specimen, bending of a contoured flange specimen and bulging of a circular specimen. By these experiments the effects of blank thickness, die bend radius, flange length and orientation of the rolling direction of the part have been investigated. Experimental results are compared with finite element results to verify the computational models.
10 citations
01 Jan 1974
TL;DR: A submitted manuscript is the version of the article upon submission and before peer-review as mentioned in this paper, while a published version is the final layout of the paper including the volume, issue and page numbers.
Abstract: • A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.
10 citations
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TL;DR: In this paper, the authors proposed a broadband polarization beam splitter on the silicon-on-insulator platform using the concept of multimode interference, where the angle between the input waveguide and the multimode interferometer was optimized in order to extract the images corresponding to the fundamental transverse electric (TE) and transverse magnetic (TM) polarizations from a single, compact MMI.
Abstract: We propose and experimentally demonstrate a broadband polarization beam splitter on the silicon-on-insulator platform using the concept of multimode interference. The angle between the input waveguide and the multimode interferometer (MMI) was optimized in order to extract the images corresponding to the fundamental transverse electric (TE) and transverse magnetic (TM) polarizations from a single, compact MMI. By changing the direction of propagation, the input angle enabled the addition of a parallelepiped to facilitate exclusively TM collection above the MMI, therefore eliminating the need to cascade successive MMIs. The MMI was tapered to improve coupling at the ports. The design allowed for a compact geometry with a length of 67.5 μm and width of 4 μm, while maintaining a feature size comparable to the waveguide width. The design was experimentally characterized over 72 parameter variations, including input angle, output TM and TE port positions, and bend radius of the output TE waveguide. The performance was consistent over the 100 nm wavelength range of 1500–1600 nm, with an average insertion loss of 2 dB. The device maintained an extinction ratio of at least 13.96 and 11.45 dB in the C-band for the TE and TM polarizations, respectively.
10 citations
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15 Apr 1999
TL;DR: A kink-resistant hose construction as mentioned in this paper is adapted for conveying fluids under high pressure which is flexible to intermediate a central longitudinal axis (12) to a minimum bend radius (13).
Abstract: A kink-resistant hose construction (10) adapted for conveying fluids under high pressure which is flexible
intermediate a central longitudinal axis (12) to a minimum bend radius. The construction includes a
thermoplastic core (14) having an inner surface (16)
defining the inner diameter of the hose and an outer surface (18),
and an innermost reinforcement layer (20) is formed as a composite of at least one metallic wire element and
at least one non-metallic fibre element. The metallic wire element is wound helically in one direction
over the outer surface of the core a predetermined pitch angle measured relative to the longitudinal axis
to define a series first turns. Each of these first tuns is spaced-apart from an adjacent first turn to define
successive pairs of first turns each having an interstitial area therebetween. The fiber element, in turn, is
wound helically over the outer surface of the core in the same direction and at the same pitch angle as
the metallic wire element to define a series of second turns each disposed intermediate a corresponding
one of the pairs of the first turns or the wire element. The fiber element substantially occupies the
interstitial area between each of the pairs of the first turns of the wire element to thereby prevent the
wall of the core from being extruded therebetween as the hose is flexed to its minimum bend radius.
10 citations