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.
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Patent•
07 May 1998
TL;DR: In this paper, a ring-shaped test body is formed through ring conclusion of a tube section by device of a pin, or through welding, pasting or clamping, and the bending event and radius are determined through evaluation of predetermined points on a bending force to bending radius graph of the test object, especially through association of the bending radius to a maximum or a turning point, or other differentially determined points.
Abstract: The method involves bending a test object with predetermined speed to test its bending stability, whereby the bending event and radius are determined through evaluation of predetermined points on a bending force to bending radius graph of the test object, especially through association of the bending radius to a maximum or a turning-point, or other differentially determined points of the bending force. The test body is ring-shaped, and is formed through ring conclusion of a tube section by device of a pin, or through welding, pasting or clamping.
6 citations
TL;DR: The experience obtained during the installation of more than 700 sheath km of fiber-optic cable is summarized, and most of the cable failures were in the "uncontrollable extrinsic category," andmost of these were due to complete cable cuts.
Abstract: The experience obtained during the installation of more than 700 sheath km of fiber-optic cable is summarized. These include in-building, underground (duct), aerial, buried, and underwater installations. In general, no special precautions are required except to maintain the specified pull tension and cable bend radius. Field splicing is discussed and results are given on splice losses with and without splice loss monitoring with the optical time domain reflectometer. A 28 percent learning curve for fusion splicing is derived. Reliability data on 312 sheath km of installed cable and field splices are presented. Most of the cable failures were in the "uncontrollable extrinsic category," and most of these were due to complete cable cuts. Finally, restoration is reviewed with emphasis on troubleshooting, repair, emergency restoration, and offset breaks.
6 citations
Patent•
15 Dec 2010
TL;DR: In this article, an interception device was provided in the region of the large bend radius (Rg) for the purpose of intercepting foreign bodies carried through the conduit piece together with the air.
Abstract: A conduit piece for the absorption of foreign bodies in an air distribution conduit of an air-conditioning installation, with a bent portion, the inner wall (I) of which has a large bend radius (Rg) and a small bend radius (Rk). To avoid flow noises according to the invention, an interception device ( 1, 10, 11, 13, 14 ) be provided in the region of the large bend radius (Rg) for the purpose of intercepting foreign bodies carried through the conduit piece together with the air.
6 citations
Journal Article•
TL;DR: In this article, a time-domain equation model considering fluid-structure interaction described by partial differencial equation was set up and the equation was transferred into frequency domain by Laplace transformation, from which an analytical solution was obtained.
Abstract: The models of two kinds of the most common pipe section structures and their analytical solutions were studiedFor straight pipes,a time-domain equation model considering fluid-structure interaction described by partial differencial equation was set upAnd the equation was transferred into frequency domain by Laplace transformation,from which an analytical solution was obtainedFor curved pipes,the model was directly solved to get an overall solution and also an analytical solution was obtainedThen the single-bend pipe model set up by Davidson was taken as an example to simply illustrate and verify the solving method for the combined structure composed of these two pipe sectionsFinally,the factors affecting the characteristics of fluid-structure interaction were analyzed by changing the bend radius and angle of curved pipeThe results show that the smaller the bend radius and angle of curved pipe,the lower the density of the spectrum diagram,showing the less severity of coupled vibration
6 citations
TL;DR: In this article, the authors investigated tensile stress and breakdown stress of dielectric paper under mechanical stress and designed a cable drum for conveyance in high-T c superconducting (HTS) cable.
6 citations