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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.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors describe the testing of three simply-supported composite steel-concrete beams and demonstrate the detrimental effects at service conditions of shrinkage in composite members incorporating a solid slab.

28 citations

Journal ArticleDOI
TL;DR: In this article, the effects of fiber diameter, fiber tensile and torsional stiffness, fiber distribution and fabric density on the bending rigidity of nonwoven fabrics are presented.
Abstract: Theoretical analyses of the effects of fiber diameter, fiber tensile and torsional stiff ness, fiber distribution and fabric density on the bending rigidity of nonwoven fabrics are presented. The fibers are assumed to exhibit linear tensile and shear stress-strain behavior. The two extreme cases of complete freedom and no freedom of relative fiber motion are analyzed.A comparison is made between the predicted and experimentally observed bending rigidities of a waterlaid, nonwoven fabric composed of short, straight viscose rayon fibers.

28 citations

Journal ArticleDOI
TL;DR: In this paper, the authors focus on multi-layered beams with controllable flexural stiffness and show that removing the cover layers from the base beam through softening of the polymer reduces axial strain in the cover layer significantly.
Abstract: Morphing aerospace structures could benefit from the ability of structural elements to transition from a stiff load-bearing state to a relatively compliant state that can undergo large deformation at low actuation cost. The present paper focuses on multi-layered beams with controllable flexural stiffness—comprising polymer layers affixed to the surfaces of a base beam and cover layers, in turn, affixed to the surfaces of the polymer layers. Heating the polymer through the glass transition reduces its shear modulus, decouples the cover layers from the base beam and reduces the overall flexural stiffness. Although the stiffness and actuation force required to bend the beam reduce, the energy required to heat the polymer layer must also be considered. Results show that for beams with low slenderness ratios, relatively thick polymer layers, and cover layers whose extensional stiffness is high, the decoupling of the cover layers through softening of the polymer layers can result in flexural stiffness reductions of over 95%. The energy savings are also highest for these configurations, and will increase as the deformation of the beam increases. The decoupling of the cover layers from the base beam through the softening of the polymer reduces the axial strains in the cover layers significantly; otherwise material failure would prevent large deformation. Results show that when the polymer layer is stiff, the cover layers are the dominant contributors to the total energy in the beam, and the energy in the polymer layers is predominantly axial strain energy. When the polymer layers are softened the energy in the cover layers is a small contributor to the total energy which is dominated by energy in the base beam and shear strain energy in the polymer layer.

28 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of pressing on bending rigidities of the face fabric, adhesive interlining and bonded composite fabric and verify the prediction method for bending rigidity of those were investigated.
Abstract: The purpose of this study is to investigate the effect of pressing on bending rigidities of the face fabric, adhesive interlining and bonded composite fabric and verify the prediction method for bending rigidity of those. Predicting methods of bending rigidity for composite with face fabric and adhesive interlining based on laminated theory were verified with measured bending rigidities and thickness of samples. Bending rigidities and thicknesses of woven fabrics, adhesive interlinings and composites with those were measured by the KES-FB system. Polytetrafluoroethylene (PTFE) film was used for measuring mechanical properties of pressed adhesive interlining. Bending rigidities of adhesive interlinings became larger and thicknesses were reduced compared to those before pressing. Bending rigidities of face fabrics didn’t change though the thicknesses became thinner than before pressing. It was found that the case of considering mechanical properties of pressed face fabric and pressed interlining was more ef...

28 citations

Journal ArticleDOI
TL;DR: In this paper, a new tester which uses a cross-shaped specimen to measure fabric drape and stiffness is proposed, where the warp and the weft strips of the specimen are supported at the central part and bend under its...
Abstract: A new tester which uses a cross-shaped specimen to measure fabric drape and stiffness is proposed. The warp and the weft strips of the specimen are supported at the central part and bend under its ...

28 citations


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