scholarly journals Features for calculating beams with a thin transverse corrugated web plate considering bending-twisting forces

2021 ◽  
Vol 263 ◽  
pp. 03006
Author(s):  
Nikolay Tishkov ◽  
Anatoliy Stepanenko
Keyword(s):  
Cross Section ◽  
Numerical Experiments ◽  
Longitudinal Direction ◽  
Arbitrary Cross Section ◽  
Elastic Rods ◽  
Bending Moments ◽  
Relative Height ◽  
Corrugated Web ◽  
Working Together ◽  
The Web

The article describes the features of the work of beams with a thin transverse corrugated web plate. Exponential fractional regression is presented, which allows one to estimate the relative height of web plate sections working together with flanges, obtained by the authors based on an analysis of numerical experiments. Based on the features of the work, a method is proposed for describing the stress state of an arbitrary cross-section of an I-beam with a thin transverse corrugated web plate (the profile of the corrugations is triangular, trapezoidal, sinusoidal) bent in the plane of the web plate and compressed in the longitudinal direction, using the theory of thin-web platted elastic rods by Professor V.Z. Vlasov. The calculations are given for determining the bending-twisting forces (local bending moments and bimoments arising from the action of the main forces) in an arbitrary cross section.

scholarly journals Bending by explosion of a multilayered concrete beam on a visco-elastic basis

2019 ◽  
Vol 97 ◽  
pp. 04055 ◽  
Author(s):  
Yury Nemirovskii ◽  
Sergey Tikhonov
Keyword(s):  
Dynamic Loading ◽  
Cross Section ◽  
Concrete Beam ◽  
Explosive Loading ◽  
Arbitrary Cross Section ◽  
Bending Moments ◽  
Residual Deflection ◽  
Tension And Compression ◽  
The Cross ◽  
Elastic Basis

In this work, the problem of bending of a multilayered concrete beam of arbitrary cross-section by explosive loading on a visco-elastic basis is considered. It is assumed that different grades of concrete can be realized in layers in the cross-section. The property of concrete resistance to tension and compression is considered in work. It is assumed that the dynamic loading is caused by consecutive explosion of two charges over the middle of the span of beam. The distribution of bending moments and deflections of the beam at each time is determined. The time of the end of motion and the residual deflection of beam are found.

The Fibre Composite Helicopter Blade

1979 ◽  
Vol 30 (2) ◽  
pp. 413-449 ◽  
Author(s):  
E.H. Mansfield ◽  
A.J. Sobey
Keyword(s):  
Cross Section ◽  
Fibre Composite ◽  
Cylindrical Tube ◽  
Arbitrary Cross Section ◽  
Bending Moments ◽  
Engineering Analysis ◽  
Helicopter Blade ◽  
Aeroelastic Tailoring ◽  
Circumferential Distribution ◽  
Stiffness Characteristics

SummaryIn Part 1 expressions are derived for the coupled torsional, extensional and flexural stiffnesses of a fibre composite tube, such as a helicopter blade, which is subjected to torsion, longitudinal tension, chordwise and flapping bending moments and shear. The theory is an extension of Batho-Bredt engineering analysis and is valid for a cylindrical tube of arbitrary cross-section with an arbitrary circumferential distribution of fibre composite plies. Particular attention is paid to the coupling effects in which an asymmetric fibre lay-up results in a twisting of the tube under bending and/or tension. Consideration is also given to the influence on the stiffness characteristics of an initial twist in the tube.In Part 2 the analysis of Part 1 is developed numerically for tubes representative of GFRP blades. Static and dynamic aspects are considered which pave the way for aeroelastic tailoring studies of such blades.

scholarly journals The longitudinal-transverse bending of reinforced concrete rods

2018 ◽  
Vol 196 ◽  
pp. 01038 ◽  
Author(s):  
Yury Nemirovskii ◽  
Sergey Tikhonov
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Limit State ◽  
Arbitrary Cross Section ◽  
Bending Moments ◽  
Maximum Deformation ◽  
Limit Value ◽  
Transverse Bending ◽  
Method Of Solution ◽  
Conditional Limit

The longitudinal transverse bending of multilayer rods made of reinforced concrete of arbitrary cross-section is considered. It is assumed that the coefficients in the connection equation between stresses, strains and temperature are different in each layer. The achievement of maximum deformation of the permissible limit value at stretching or compression is accepted as the criterion of conditional limit state in the i-layer. The case of longitudinal-transverse bending of a hinged rod is considered as an example of this method of solution. The distribution of bending moments and longitudinal forces, displacements and deformations is determined.

The Buckling of Shallow Corrugated Webs in Shear

1968 ◽  
Vol 72 (694) ◽  
pp. 883-886 ◽  
Author(s):  
A. Rothwell
Keyword(s):  
Theoretical Analysis ◽  
Cross Section ◽  
Orthotropic Plate ◽  
Local Mode ◽  
Corrugated Webs ◽  
Corrugated Web ◽  
Shear Buckling ◽  
The Web

Summary The results of a series of shear buckling tests on shallow, flat-sided, corrugated webs are presented, and a comparison made with a theoretical analysis in which the web is assumed to buckle either as an orthotropic plate or in a local mode. An expression is derived for the efficiency of a corrugated web in shear, and used to compare the four shapes of cross-section tested.

Computation of waveguide modes for waveguides of arbitrary cross-section

1990 ◽  
Vol 137 (2) ◽  
pp. 145 ◽  
Author(s):  
C.Y. Kim ◽  
S.D. Yu ◽  
R.F. Harrington ◽  
J.W. Ra ◽  
S.Y. Lee
Keyword(s):  
Cross Section ◽  
Arbitrary Cross Section ◽  
Waveguide Modes
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