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Flexural rigidity

About: Flexural rigidity is a research topic. Over the lifetime, 3829 publications have been published within this topic receiving 56780 citations.


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TL;DR: In this paper, the authors present an advanced structure type for pedestrian suspension bridges created from hot-rolled cable or welded members of finite flexural stiffness, and develop analytical expressions for determining inner forces and displacements.
Abstract: High strength cables, steel plates, or prestressed RC members (also named as stress-ribbons) usually serve as the main load carrying elements of up-to-date pedestrian bridge structures. An application of these elements is prescribed actually by a large magnitude of permanent load. However, a realization of such structures requires many material resources. This paper presents an advanced structure type for pedestrian suspension bridges created from hot-rolled cable or welded members of finite flexural stiffness. Development of displacements in such a structure subjected to symmetric and asymmetric loadings is studied. A method of stabilizing displacements via flexural stiffness variation and its efficiency is considered. Displacement variation and strength of advanced load carrying capacity of structure are investigated, and developed analytical expressions for determining inner forces and displacements are presented. An analysis of rational parameters for advanced structure of pedestrian suspension bridges yields expressions for determining necessary flexural stiffness, cross-sectional height, and area of load carrying structural elements. A rational primary structural shape vs. ratio of permanent and variable loadings is analyzed. A technical-economic efficiency is illustrated via numerical simulation of rational parameters for advanced structure of pedestrian bridge.

19 citations

Journal ArticleDOI
TL;DR: In this article, it was shown that an axisymmetric vibration mode can be realized by increasing the bending rigidity of the outer rim of the circular plate by using a larger thickness or by using material with a larger Young's modulus or both.

19 citations

Journal ArticleDOI
TL;DR: In this paper, the bending properties of a series of plain and rib weft knitted structures made from cashmere yarns were analyzed in terms of the structural characteristics (cover factor, fabric weight) and their effects on bending properties.
Abstract: This work deals with the bending properties of a series of plain and rib weft knitted structures made from cashmere yarns. Additionally, some plain weft knitted fabrics made from polyester textured yarns (PET) are included for comparison. The experimental results are discussed in terms of the structural characteristics (cover factor, fabric weight) and their effects on the bending properties. Theoretical analyses of the effects of yarn bending properties and fabric structure on the bending rigidity and frictional bending moment of the fabrics are based on our straight parallel yarns (SPY) model. In this model, the knitted structure is assumed to consist of a series of straight yarns that have some overlapping regions at the interlocking points. The estimation of fabric bending parameters is based on summing up the bending parameters of these straight yarns, which have some overlapping regions lying in the direction of bending. The estimated values from this model are compared with the values measured on a...

19 citations

Journal ArticleDOI
TL;DR: In this paper, the authors measured bending rigidity of textiles in different directions, the so-called anisotropy of bending rigidness, and compared the results of measuring on the standard device KES-FB2 with the results on device TH-7, they can see a very good correspondence.
Abstract: Bending rigidity is a significant property of textiles that influences their further behavior, for example draping and wrinkling. The thorough analysis of draping and wrinkling behavior of textiles requires also knowledge of bending rigidity of the textiles in different directions, the so-called anisotropy of bending rigidity. Anisotropy of bending rigidity has been so far mostly measured on rectangular shaped samples; nevertheless, the circular shape seems to be the ideal one. This article presents device TH-7, which enables one to measure this non-standard circular shaped sample. Comparing the results of measuring of bending rigidity on the standard device KES-FB2 with the results of measuring on device TH-7, we can see a very good correspondence, that is, the value of the correlation coefficient equals 0.9. The described way of measuring the anisotropy of bending rigidity on circular samples will speed up and improve the quality of further research in the field of influence of the textile structure (we...

19 citations

Journal ArticleDOI
TL;DR: In this paper, the bending problem of a thin rectangular plate with in-plane variable stiffness is studied, and the basic equation is formulated for the two-opposite-edge simply supported rectangular plate under the distributed loads.
Abstract: The bending problem of a thin rectangular plate with in-plane variable stiffness is studied. The basic equation is formulated for the two-opposite-edge simply supported rectangular plate under the distributed loads. The formulation is based on the assumption that the flexural rigidity of the plate varies in the plane following a power form, and Poisson's ratio is constant. A fourth-order partial differential equation with variable coefficients is derived by assuming a Levy-type form for the transverse displacement. The governing equation can be transformed into a Whittaker equation, and an analytical solution is obtained for a thin rectangular plate subjected to the distributed loads. The validity of the present solution is shown by comparing the present results with those of the classical solution. The influence of in-plane variable stiffness on the deflection and bending moment is studied by numerical examples. The analytical solution presented here is useful in the design of rectangular plates with in-plane variable stiffness.

19 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202395
2022201
2021171
2020163
2019178
2018146