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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: The present study compared bending in 10 archwires made from NiTi orthodontics alloy of two cross-sectional dimensions and found that the flexural rigidity is not constant and the influence of size was not as important as it should be.
Abstract: The present study compared bending in 10 archwires made from NiTi orthodontics alloy of two crosssectional dimensions. The results were based on microstructural and mechanical investigations. With conventional alloys, the fl exural rigidity was constant for each wire and increased largely with the crosssectional dimension for the same strain. With NiTi alloys, the fl exural rigidity is not constant and the infl uence of size was not as important as it should be. This result can be explained by the non-constant elastic modulus during the martensite transformation process. Thus, in some cases, treatment can begin with full-size (rectangular) wires that nearly fi ll the bracket slot with a force application deemed to be physiologically desirable for tooth movement and compatible with patient comfort.

37 citations

Journal ArticleDOI
TL;DR: Extension of the description of buckled elastic membranes to the authors' quasi-2D geometry enables the determination of the ratio of CMM bending rigidity to its Young's modulus, apparently reducing contact line bending and pinning and induces uniform deposition of ellipsoids.
Abstract: We investigate the influence of particle shape on the bending rigidity of colloidal monolayer membranes (CMMs) and on evaporative processes associated with these membranes. Aqueous suspensions of colloidal particles are confined between glass plates and allowed to evaporate. Confinement creates ribbonlike air-water interfaces and facilitates measurement and characterization of CMM geometry during drying. Interestingly, interfacial buckling events occur during evaporation. Extension of the description of buckled elastic membranes to our quasi-2D geometry enables the determination of the ratio of CMM bending rigidity to its Young's modulus. Bending rigidity increases with increasing particle anisotropy, and particle deposition during evaporation is strongly affected by membrane elastic properties. During drying, spheres are deposited heterogeneously, but ellipsoids are not. Apparently, increased bending rigidity reduces contact line bending and pinning and induces uniform deposition of ellipsoids. Surprisingly, suspensions of spheres doped with a small number of ellipsoids are also deposited uniformly.

37 citations

Journal ArticleDOI
TL;DR: In this paper, anisotropic polymeric matrix composite discs supported on three points were subjected to a non-destructive bending test to study their behaviour in complex flexural loading situations, and the results showed that the flexural behaviour of the composites depends on several factors, such as fibre orientation, laminate stacking, surface waviness and moulding temperature.

37 citations

Journal ArticleDOI
TL;DR: In this article, the energy of a mass of liquid is evaluated asymptotically in powers of the range of the intermolecular potential divided by a typical dimension of the liquid.
Abstract: The energy of a mass of liquid is evaluated asymptotically in powers of the range of the intermolecular potential divided by a typical dimension of the liquid. The leading term is the internal energy, proportional to the liquid volume. The second term is the energy of surface tension, proportional to the area of the liquid surface. The third term is proportional to an integral over this surface of the square of the mean curvature of the surface minus one-third of its Gaussian curvature. This new term has exactly the form of the bending energy of a thin elastic plate. Comparing it with the bending energy yields expressions for the flexural rigidity and the Poisson ratio of the liquid surface. This flexural rigidity of the surface leads to new terms in the equation of equilibrium of the liquid surface, in addition to the usual surface tension terms.

37 citations

Journal ArticleDOI
01 Aug 2010
TL;DR: In this paper, a model for the stiffness of inclined screws used as shear connectors in timber and concrete composite floors is presented, which assumes that the screw behaves as a beam on a two-dimensional elastic foundation and models the timber as orthogonal springs with differing stiffnesses in the grain and transverse directions.
Abstract: This paper presents a model for the stiffness of inclined screws used as shear connectors in timber and concrete composite floors Screws inclined in the direction of slip have been shown to provide a higher stiffness (slip modulus) than vertically placed screws An increased slip modulus per screw enhances the effective flexural stiffness of a partially composite timber and concrete beam, or, alternatively, allows the same flexural stiffness to be achieved with fewer screws The model assumes that the screw behaves as a beam on a two-dimensional elastic foundation: it takes account of the inclination of the screw and models the timber as orthogonal springs with differing stiffnesses in the grain and transverse directions The model also considers axial deformation, and hence shear lag, of the screw Optimum inclination angle and embedment length of screw can be predicted Preliminary validation of the model is provided by comparison with some experimental results

37 citations


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