Topic
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, a two-dimensional dynamics model for the motion of fibers in an accelerating laminar air flow is presented, which includes effects of inertia, air drag, and flexural rigidity.
Abstract: A two-dimensional dynamics model for the motion of fibers in an accelerating laminar air flow is presented. Nonlinear model equations for each fiber include effects of inertia, air drag, and flexural rigidity. This rigidity, or stiffness, acts in such a way that a curled or hooked fiber resists being straightened. Randomly distributed fiber crimps at the inlet can be preferentially straightened as the fibers are transported in two converging ducts. Statistical measures of straightening are provided.
33 citations
TL;DR: In this paper, the behavior of eight-ply, quasi-isotropic, graphite epoxy laminates subjected to low velocity transverse impact loading was discussed and large deflection theory of plates was used to predict the load-deflection characteristics during the impact event.
Abstract: This work discusses the behavior of eight-ply, quasi-isotropic, graphite epoxy laminates subjected to low velocity transverse impact loading Large deflection theory of plates was used to predict the load-deflection characteristics during the impact event The impact model considered that the indentation, flexural and shear stiffnesses could be represented by three-equivalent springs in series The analysis of static and dynamic impact loading test-data concluded that the membrane parameter, beta, used in flexural stiffness relation was proportional to the square of the coefficient of restitution, e, of the impactor Use of beta=0443 e-squared was made in load-deflection relations to consider the drop in plate stiffness due to delamination The results of impact tests up to impact velocity 53 m/sec were found in close agreement with the predictions
33 citations
TL;DR: In this paper, a cost-effective shear-strengthening technique for timber stringers that is environmentally friendly and leads to a durable structure was developed, where two strengthening schemes were investigated; incorporating vertical and diagonal glass fiber-reinforced polymer (GFRP) sheets applied to both shear spans.
Abstract: The objective of this study was to develop a cost-effective shear-strengthening technique for timber stringers that is environmentally friendly and leads to a durable structure. Testing was performed on creosote-treated Douglas fir beams, with dimensions of 100×400×3,650 mm , removed from a 40 year old bridge. Two strengthening schemes were investigated; incorporating vertical and diagonal glass fiber-reinforced polymer (GFRP) sheets applied to both shear spans. The diagonal scheme proved effective in increasing the average ultimate load, flexural stiffness, and deformability of the beams. Performance of the members reinforced using the vertical scheme, however, was poor compared to diagonally reinforced beams. The contribution of the diagonal sheets to the shear capacity of the stringers was around 12% at service loads and 40% at ultimate load. In conclusion, this study has shown that diagonal GFRP sheets are more effective than vertical sheets in shear-strengthening timber stringers with horizontal spli...
33 citations
TL;DR: In this paper, a fluorinated ethylene propylene (FEP) based surface coating was applied to a hybrid glass/carbon epoxy composite rod used in Aluminum Core Composite Conductors (ACCC®), one type of PCCC.
33 citations
TL;DR: In this article, a series of plain and rib weft knitted structures made from cashmere and polyester textured yarns were measured by a sensory method for bending rigidity, thickness, compressibility, and coefficient of friction.
Abstract: Mechanical parameters such as bending rigidity, thickness, compressibility, and coef ficient of friction are measured by a sensory method for a series of plain and rib weft knitted structures made from cashmere and polyester textured yarns. The values estimated by the sensory method are found to be in fairly good agreement with the values measured on the KES system. The results of our work indicate that by using a standard and controlling the handling manner, sensory assessments can be as successfully quantified as instrumental measurements. However, detectable differences in each mechanical param eter vary with the sensory assessment, depending on the property being considered. The sensory measurement of fabric thickness yields the most consistent and accurate results. Other parameters such as the bending rigidity, compressibility, and coefficient of friction are also reasonably estimated. In addition, the effectiveness of the sensory measurements is also discussed in terms of knit construction and fiber...
33 citations