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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
08 Aug 2006
TL;DR: A resilient flexure as discussed by the authors has one end attached within a cavity in a rigid member and the other end attached in a structural mode, and the cavities are shaped to limit the flexure's bend radius.
Abstract: A resilient flexure has one end attached within a cavity in a rigid member, and the other end attached within a cavity in a structural mode. The cavities are shaped to limit the flexure's bend radius. The member and the node have mating surfaces that abut to constrain the amount of rotation of the member. The aforementioned elements are shaped to prevent the strain in the flexure from exceeding its design limit when the joint is at its maximum angular deflection and the attached member is fully collapsed.

13 citations

Journal ArticleDOI
TL;DR: In this paper, a new technique of varying curvature push-bending is presented, which makes rectangular section tube blank to deform progressively from large radius to small radius in the process of push-bending.

13 citations

Patent
20 Feb 2001
TL;DR: In this article, the authors considered waveguide material composition and thickness for guiding and cladding layers, bend radius, ridge width and etch depth at which the modal indices of the fundamental TE and TM modes are equal.
Abstract: A strongly confined ridge waveguide that provides substantially reduced polarization sensitivity, without significant compromise for other waveguide characteristics such as, for example, single-mode condition, and low propagation and bending losses for the fundamental mode. The present invention considers waveguide material composition and thickness for guiding and cladding layers, bend radius, ridge width and etch depth at which the modal indices of the fundamental TE and TM modes are equal. With those parameters, the losses (e.g., the imaginary parts of the modal indices) of the fundamental and first-order modes may be calculated. By considering the previously mentioned criteria, a low-loss, single-mode ridge waveguide may be constructed in accordance with the present invention having losses of the fundamental modes in the range of less than approximately 1.0 dB/mm, and losses of higher-order modes in the range of greater than approximately 10 dB/mm (thus providing a loss difference of at least approximately 10 dB/mm).

13 citations

Patent
29 Aug 2007
TL;DR: In this paper, a soft paper-based friction material that contains 3-7wt% flexibility reinforcement fiber, 5-20wt% carbon fiber, 4-25wt% other fiber, 2-20WT% flexibility adhesive, 20-44wt% friability adhesive, 10-25WT% frictional properties regulator, and 15-30WT% filling material.
Abstract: The invention discloses a soft paper based friction material that contains 3-7wt% flexibility reinforcement fiber, 5-20wt% carbon fiber, 4-25wt% other fiber, 2-20wt% flexibility adhesive, 20-44wt% friability adhesive, 10-25wt% frictional properties regulator, and 15-30wt% filling material. The invention has good flexibility, and improved frictional wear ability of the paper base friction material. The minimum bending radius of curvature is 6.0-6.8cm, and good mechanical strength and thermal endurance.

13 citations

Journal ArticleDOI
TL;DR: In this paper, a 60 nm-thick SOI waveguide bend based on the truncated Eaton lens implemented by varying thickness of the guiding layer was studied. And the three-dimensional full-wave simulations reveal that the designed waveguide bend, with a radius of 3.9 $\mu m$, reduces the bending loss from 3.3 to 0.42 dB at the wavelength of 1550 nm.
Abstract: Silicon-on-insulator (SOI) waveguides with different geometries have been employed to design various integrated optical components. Reducing the bending radius of the SOI waveguides with low bending loss is essential in minimizing the footprint of light-wave circuits. The propagating mode is less confined in the core of the ultra-thin SOI waveguide and penetrates to substrate and cladding, leading to higher bending loss compared with conventional SOI waveguide with the thicker guiding layer. While various bending mechanisms have been utilized to reduce the bending loss of conventional SOI waveguides, the ultra-thin SOI waveguide bends have not been studied in detail. In this paper, we present a 60 nm-thick SOI waveguide bend based on the truncated Eaton lens implemented by varying thickness of the guiding layer. The three-dimensional full-wave simulations reveal that the designed waveguide bend, with a radius of 3.9 $\mu m$, reduces the bending loss from 3.3 to 0.42 dB at the wavelength of 1550 nm. Moreover, the bending loss for the wavelength range of 1260-1675 nm is lower than 0.67 dB while the bending loss in the C-band is lower than 0.45 dB.

13 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202365
2022172
202181
2020112
2019135
2018153