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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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Journal ArticleDOI
TL;DR: In this article, a structural concept with adaptive bending-twist coupling aiming at a broad adjustment range of coupling stiffness while maintaining high flexural rigidity is investigated by analysis, simulation and experiment.
Abstract: Semi-active structural elements based on variable stiffness represent a promising approach to the solution of the conflict of requirements between load-carrying capability and shape adaptivity in morphing lightweight structures. In the present work, a structural concept with adaptive bending–twist coupling aiming at a broad adjustment range of coupling stiffness while maintaining high flexural rigidity is investigated by analysis, simulation and experiment.

20 citations

Journal ArticleDOI
TL;DR: In this article, the authors examined the interaction of these geometric nonlinearities with the complex material behavior of pseudoelastic NiTi tubes of moderate diameter-to-thickness ratios under bending.

20 citations

Proceedings ArticleDOI
Pravin K. Mehta1
03 Jun 1987
TL;DR: In this paper, the relative merits of symmetric sandwich and open back light-weighted designs in the 10 to 30 kg/m2 range (of mirror weight per unit area) are examined for ULE, Heraeus fused silica, Zerodur and beryllium, subject to some representative state-of-the-art fabrication constraints.
Abstract: One of the key parameters usually considered in a light weighted mirror design is its flexural rigidity. In part I of this paper, the relative merits of symmetric sandwich and open back light-weighted designs in the 10 to 30 kg/m2 range (of mirror weight per unit area) are examined for ULE, Heraeus fused silica, Zerodur and beryllium, subject to some representative state-of-the-art fabrication constraints. Part II of the paper addresses the same issue independently of any specific material. This is made possible by normalization of several parameters by the weight equivalent solid thickness of the mirror. Also included in the study are nonsymmetric sandwich cross sections with unequal front and rear facesheet thicknesses. The study shows that, for given values of mirror weight per unit area and the core (or rib) solidity ratio, there exists a transitional value of the normalized front facesheet thickness above which an open back configuration is structurally superior to a sandwich configuration. Moreover, for the increasingly demanding light-weighting goals of moderns optical systems, the optimum geometrical configurations may be beyond the fabrication capability of the current state of the art.© (1987) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

20 citations

Journal ArticleDOI
TL;DR: In this article, extensive molecular dynamics simulations are performed on four different graphynes (α, β-, γ-, and 6,6,12-graphynes) to explore their mechanical properties (shear modulus, shear strength, and bending rigidity) under shearing and bending.
Abstract: Graphynes are the allotrope of graphene. In this work, extensive molecular dynamics simulations are performed on four different graphynes ( α-, β-, γ-, and 6,6,12-graphynes) to explore their mechanical properties (shear modulus, shear strength, and bending rigidity) under shearing and bending. While the shearing properties are anisotropic, the bending rigidity is almost independent of the chirality of graphynes. We also find that the shear modulus and shear fracture strength of graphynes decrease with increasing temperature. The effect of the percentage of the acetylenic linkages on the shear mechanical properties and bending rigidity is investigated. It is shown that the fracture shear strengths and bending rigidities of the four types of graphynes decrease, while the fracture shear strain increases, with increasing percentages of the acetylenic linkages. Significant wrinkling is observed in graphyne under shear strain. The influence of the temperatures and percentages of the acetylenic linkages on the r...

20 citations

Journal ArticleDOI
TL;DR: In this article, the influence of local postbuckling behavior on the bending of thin-walled beams is studied and it is shown that the post-buckling equilibrium branch in a bending moment-global curvature coordinate system for a perfectly elastic thinwalled beam is rectilinear (in the second order approximation of' the asymptotic method).
Abstract: The influence of the local postbuckling behaviour on the bending of thinwalled beams is studied. The analysis of the postbuckling behaviour of a prismatic column-beam subject to compression and bending is employed in order to determine the overall flexural stiffness of a beam after local buckling. The asymptotic Koiter method is used in the second order approximation. The determination of post-buckling coefficients enables one to find the beam's flexural stiffness without the necessity of using hypotheses on effective widths of eccentrically compressed plates. It is shown that the post-buckling equilibrium branch in a bending moment-global curvature coordinate system for a perfectly elastic thin-walled beam is rectilinear (in the second order approximation of' the asymptotic method). Simple analytical relations are presented between the slope of the post-buckling equilibrium branch of global bending and post-buckling coefficients for local buckling mode. The results obtained are compared with data reported by other authors.

20 citations


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