scispace - formally typeset
Search or ask a question
Topic

Bending moment

About: Bending moment is a research topic. Over the lifetime, 14577 publications have been published within this topic receiving 158834 citations. The topic is also known as: bending moment.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, a moving nanoparticle is modeled by a moving point load by considering its full inertial effects and Coulomb friction with the inner surface of the carbon nanotube (SWCNT).
Abstract: Interaction of a moving nanoparticle with a single-walled carbon nanotube (SWCNT) is of concern. The SWCNT is simulated by an equivalent continuum structure (ECS) under simply supported boundary conditions. The moving nanoparticle is modeled by a moving point load by considering its full inertial effects and Coulomb friction with the inner surface of the ECS. The ECS under the moving nanoparticle is modeled based on the Rayleigh, Timoshenko, and higher-order beam theories in the context of the nonlocal continuum theory of Eringen. The dimensionless discrete equations of motion associated with the nonlocal beam models are then obtained by using Galerkin method. The effects of slenderness ratio of the ECS, ratio of mean radius to thickness of the ECS, mass weight and velocity of the moving nanoparticle, and small scale parameter on the dynamic response of the SWCNT are explored. The capabilities of various nonlocal beam theories in capturing the longitudinal and transverse displacements as well as the nonlocal axial force and bending moment are also scrutinized in some detail. The possibility of moving nanoparticle separation from the inner surface of the SWCNT is examined by monitoring the sign of the contact force. Subsequently, the role of important parameters on the possibility of this phenomenon is explored using various nonlocal beam theories.

68 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented a complete set of formulas to calculate the displacements and stresses on an infinitely long Bernoulli-Euler beam on the Pasternak model and carried out numerical case studies on mechanical quantities of the beam and the shear layer.

68 citations

Journal ArticleDOI
TL;DR: The data derived from this study of loading at very slow rates provide a lower limit for bending moments and for cervical spine stiffness, and yield a first approximation to dynamic bending stiffness values that may be included in models of the cervical spine.

68 citations

Journal ArticleDOI
TL;DR: In this article, the effect of skew angles on simple-span reinforced concrete bridges was investigated using the finite element analysis (FEA) method using the AASHTO HS-20 design trucks positioned close to one edge on each bridge to produce maximum bending in the slab.
Abstract: The effect of a skew angle on simple-span reinforced concrete bridges is presented in this paper using the finite-element method. The parameters investigated in this analytical study were the span length, slab width, and skew angle. The finite-element analysis (FEA) results for skewed bridges were compared to the reference straight bridges as well as the American Association for State Highway and Transportation Officials (AASHTO) Standard Specifications and LRFD procedures. A total of 96 case study bridges were analyzed and subjected to AASHTO HS-20 design trucks positioned close to one edge on each bridge to produce maximum bending in the slab. The AASHTO Standard Specifications procedure gave similar results to the FEA maximum longitudinal bending moment for a skew angle less than or equal to 20°. As the skew angle increased, AASHTO Standard Specifications overestimated the maximum moment by 20% for 30°, 50% for 40°, and 100% for 50°. The AASHTO LRFD Design Specifications procedure overestimated the FEA maximum longitudinal bending moment. This overestimate increased with the increase in the skew angle, and decreased when the number of lanes increased; AASHTO LRFD overestimated the longitudinal bending moment by up to 40% for skew angles less than 30° and reaching 50% for 50°. The ratio between the three-dimensional FEA longitudinal moments for skewed and straight bridges was almost one for bridges with skew angle less than 20°. This ratio decreased to 0.75 for bridges with skew angles between 30 and 40°, and further decreased to 0.5 as the skew angle of the bridge increased to 50°. This decrease in the longitudinal moment ratio is offset by an increase of up to 75% in the maximum transverse moment ratio as the skew angle increases from 0 to 50°. The ratio between the FEA maximum live-load deflection for skewed bridges and straight bridges decreases in a pattern consistent with that of the longitudinal moment. This ratio decreased from one for skew angles less than 10° to 0.6 for skew angles between 40 and 50°.

68 citations

Journal ArticleDOI
TL;DR: In this paper, a force-displacement mixed control quasi-static test on eight CFST columns subjected to combined compression, bending and torsion cyclic load was performed.
Abstract: Based on the force–displacement mixed control quasi-static test on eight CFST columns subjected to combined compression, bending and torsion cyclic load, the mechanical behavior of CFST columns with various section types, bending moment to torsion moment ratios and axial load levels was studied. The test results showed that the hysteretic curves of CFST columns under combined compression, flexure and torsion are plump due to the good seismic behavior and the ductility was also good. But for rectangular CFST columns with high bending moment to torsion moment ratio, the strength degradation was observed due to the local buckling of the steel plate at the bottom. The torsion capacity of CFST columns would be reduced by the bending moment. The plane section assumption of axial strain of CFST columns could be satisfied. The shear strain of the steel tube has good linear relationship with the rotation angle of the section when CFST columns subjected to combined compression, flexure and torsion. Based on the test results and literatures available, the mechanism of CFST columns was qualitatively analyzed.

67 citations


Network Information
Related Topics (5)
Finite element method
178.6K papers, 3M citations
88% related
Fracture mechanics
58.3K papers, 1.3M citations
86% related
Compressive strength
64.4K papers, 1M citations
84% related
Ultimate tensile strength
129.2K papers, 2.1M citations
83% related
Vibration
80K papers, 849.3K citations
82% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023489
2022961
2021623
2020584
2019660
2018613