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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
01 Feb 1993
TL;DR: In this article, a ballistic fuse is pre-folded end to end before stacking in order to place both halves of a surface layer of one polarity into mutually contacting relationship, thereby reducing the risk of short circuits, and furthermore doubling the bend radius required for pleating.
Abstract: A ballistic fuse, which converts mechanical energy derived from the initial firing to stored electrical energy used to energize a later detonation, having piezoelectric polymer film strip with oppositely polarized layers on opposite surfaces, is pre-folded end to end before pleating and stacking in order to place both halves of a surface layer of one polarity into mutually contacting relationship, thereby reducing the risk of short circuits, and furthermore to double the bend radius required for pleating, thereby decreasing the risk of hinge failure due to bending stress at the pleated folds, and the continuous pattern of circles joined side by side in each layer is printed with conductive silver ink on the polymer film to eliminate the necessity of joining surfaces of like polarity with individual leads.

22 citations

Journal ArticleDOI
TL;DR: In this article, the effects of core die, pressure die, mandrel die, and bend die on thickness changing rate of 3A21 aluminum alloy tube were investigated under rotary draw bending under multi-dies constraints.
Abstract: To predict and control wall thickness distribution of thin-walled rectangular 3A21 aluminum alloy tube, the experiments of rotary draw bending process under multi-dies constraints are conducted. It is found that the thickness changing rates in middle bent zone are large, and the maximum values are obtained nearby the tube ridges. The effects of core die, pressure die, mandrel die, and bend die on thickness changing rate are significant. And the thinning rate increases with increase of core number, bend velocity, clearance between tube–pressure die interface and mandrel extension, but it decreases with increase of bend radius and boost velocity of pressure die. The thickening rate increases with increase of core number, boost velocity of pressure die and clearance between tube–wiper die interface, but it decreases with increase of bend radius and bend velocity.

22 citations

Journal ArticleDOI
TL;DR: In this article, a macro bending standard singlemode fiber (SMF28) is optimized as an edge filter, with the optimal bending radius and length determined according to the bend loss and polarization sensitivity of the bending fibre.
Abstract: A macrobending standard single-mode fibre (SMF28) is optimized as an edge filter, with the optimal bending radius and length determined according to the bend loss and polarization sensitivity of the bending fibre. An all-fibre ratiometric wavelength system is built and calibrated. The system's accuracy and resolution is discussed with the influence of noise of input signal and photodetectors. Finally, the ratiometric system is employed for the demodulation of FBG strain sensing.

22 citations

Journal ArticleDOI
TL;DR: In this paper, two variants for modeling pipe, a beam model and a beam-shell hybrid model, were examined and a suitable boundary condition was introduced at the ends of the system to simulate the far field.
Abstract: A buried pipe extends over long distances and passes through soils with different properties. In the event of an earthquake, the same pipe experiences a variable ground motion along its length. At bends, geometrically a more complicated problem exists where seismic waves propagating in a certain direction affect pipe before and after bend differently. Studying these different effects is the subject of this paper. Two variants for modeling of pipe, a beam model and a beam-shell hybrid model are examined. The surrounding soil is modeled with the conventional springs in both models. A suitable boundary condition is introduced at the ends of the system to simulate the far field. Effects of angle of incidence in the horizontal and vertical planes, angle of pipe bend, soil type, diameter to thickness ratio, and burial depth ratio on pipe strains at bend are examined thoroughly. It is concluded that extensional strains are highest at bends and these strains increase with the angle of incidence with the vertical axis. The pipe strains attain their peaks when pipe bend is around $$135^{\circ }$$ and exceed the elastic limit in certain cases especially in stiffer soils, but remain below the rupture limit. Then equations for predicting the seismic response of the buried pipe at bend are developed using the analytical data calculated above and regression analysis. It is shown that these semi-analytical equations predict the response with very good accuracy saving much time and effort.

22 citations

Journal ArticleDOI
TL;DR: In this article, a spoof surface plasmon polaritons (SSPPs) waveguide structure with periodic T-grooves is proposed and investigated, and the effects of bend radius of 90° T-Grooves waveguide on propagation performance are analyzed, and a good transmission characteristics of waveguides with small bend radius are verified.
Abstract: A spoof surface plasmon polaritons (SSPPs) waveguide structure with periodic T-grooves is proposed and investigated in this paper. Compared to the conventional plasmonic waveguide with periodic rectangular-grooves, the proposed waveguide support the guided SSPPs wave with enhanced propagation confinement. Moreover, the waveguide with T-grooves can achieve 39.4% decrease in length compared with the rectangular-grooves waveguide. The propagation properties of the SSPPs with enhanced confinement are able to improve by adjusting the shape dimensions of T-grooves. The effects of bend radius of 90° T-grooves waveguide on propagation performance are analyzed, and the good transmission characteristics of waveguides with small bend radius are verified. The experimental verifications of the T-grooves plasmonic waveguide filter and 3 dB power divider in microwave region are realized, S21-parameter of waveguide filter is very close to 0 dB from 0 GHz to 5.6 GHz. And 3 dB power divider achieves very good power equipartition from 0 GHz to 5.5 GHz.

22 citations


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