Estimation of transverse shear force during slamming impacts on a simply supported composite panel using a strain derivative method

2016 ◽  
Vol 153 ◽  
pp. 42-49 ◽  
Author(s):  
T. Allen ◽  
M. Battley
Keyword(s):  
Transverse Shear ◽  
Shear Force ◽  
Composite Panel ◽  
Simply Supported ◽  
Derivative Method ◽  
Strain Derivative

The Influence of Rotatory Inertia and Transverse Shear on the Dynamic Plastic Behavior of Beams

1979 ◽  
Vol 46 (2) ◽  
pp. 303-310 ◽  
Author(s):  
Norman Jones ◽  
J. Gomes de Oliveira
Keyword(s):  
Transverse Shear ◽  
Shear Force ◽  
Yield Criterion ◽  
Yield Condition ◽  
Bending Moment ◽  
Plastic Behavior ◽  
Plastic Response ◽  
Rotatory Inertia ◽  
Perfectly Plastic ◽  
Theoretical Procedure

The theoretical procedure presented herein examines the influence of retaining the transverse shear force in the yield criterion and rotatory inertia on the dynamic plastic response of beams. Exact theoretical rigid perfectly plastic solutions are presented for a long beam impacted by a mass and a simply supported beam loaded impulsively. It transpires that rotatory inertia might play a small, but not negligible, role on the response of these beams. The results in the various figures indicate that the greatest departure from an analysis which neglects rotatory inertia but retains the influence of the bending moment and transverse shear force in the yield condition is approximately 11 percent for the particular range of parameters considered.

Flexure of a Circular Plate With a Ring of Holes

1962 ◽  
Vol 29 (3) ◽  
pp. 489-496 ◽  
Author(s):  
H. Kraus
Keyword(s):  
Circular Plate ◽  
Shear Force ◽  
General Boundary Condition ◽  
Uniform Pressure ◽  
Simply Supported ◽  
Moment Distribution ◽  
Theory Of Plates ◽  
Circular Holes ◽  
The Moment ◽  
Kirchhoff Theory

The problem of the moment distribution resulting from a uniform pressure load acting over the surface of a circular plate containing a ring of equally spaced circular holes with, and without, a central circular hole is solved within the framework of the Poisson-Kirchhoff theory of plates. A general boundary condition is applied at the outer rim of the plate to make the solution valid for a range of conditions from the simply supported case to the clamped case. The edges of the perforations are allowed to be either free or to have a net shear force acting. Numerical results in the form of curves are given for typical cases, and the results of a photoelastic test are also presented.

End Effects in Laminated Anisotropic Beams — Part I

1995 ◽  
Vol 117 (4) ◽  
pp. 279-284
Author(s):  
J. A. Ackermann ◽  
T. J. Kozik
Keyword(s):  
Stress Field ◽  
Normal Stress ◽  
Transverse Shear ◽  
Analytical Method ◽  
Normal Load ◽  
End Effects ◽  
Laminated Beam ◽  
Simply Supported ◽  
Combination Of Material

The derivation of an analytical method to examine the stress field near the end of a simply supported, laminated beam is presented. Specific effort has been directed to accurately calculate the transverse-shear and normal stress by incorporating the exact displacement relations derived, by Kozik (1970). The method accommodates any combination of material lay-up and any type of normal load on the upper and lower surfaces. The reactions at the ends of the beam may be distributed over the surface edges in a fashion most accurately characterizing the physical supports. The solution and application of the method is presented in Part II of this paper.

scholarly journals Critical Frequencies of Composite Cylindrical Shells

2020 ◽  
Vol 25 (1) ◽  
pp. 79-87
Author(s):  
K. Renji ◽  
S. Josephine Kelvina Florence
Keyword(s):  
Cylindrical Shell ◽  
Shear Deformation ◽  
Transverse Shear ◽  
Critical Frequency ◽  
Composite Panel ◽  
Transverse Shear Deformation ◽  
Composite Cylindrical Shell ◽  
Composite Cylinder ◽  
Bending Waves ◽  
Bending Wave

The sound radiation characteristics of a structure depend on its critical frequency. The expression for theoretically estimating the critical frequency of a composite cylindrical shell has not yet been reported. Thus, the practice is to use the expression for the composite panel for determining the critical frequency of a composite shell. In this work, critical frequencies of composite shells are investigated. As the critical frequency depends on the speed of the bending wave, an expression for the speed of the bending wave is first derived. It is seen that the curvature causes an increase in the speed of the bending wave and the orthotropic nature of the cylinder reduces the speed. An expression for the critical frequency of a composite cylindrical shell is then derived. The curvature causes a reduction in the critical frequency and the influence is significant in acoustically thick cylinders. Hence, the critical frequencies of such cylinders cannot be determined by using the expression for the panels. Effects of transverse shear deformation on the speed of the bending wave as well as the critical frequency are then investigated. Transverse shear deformation causes both reduction in the speed of the bending wave and an increase in the critical frequency. The orthotropic nature of the cylindrical shell increases the critical frequency further. The critical frequency of a typical composite cylinder is determined through a numerical simulation and the results are in agreement with the results obtained using the expressions derived. The critical frequency of a typical composite cylinder obtained through an experiment is presented. With this work, expressions for theoretically estimating the speeds of the bending waves and critical frequencies are derived for a composite cylindrical shell considering transverse shear deformation.

scholarly journals Investigation of Load Distribution Factors for Simply-Supported Composite Multiple Box Girder Bridges

2021 ◽  
Author(s):  
Siham Kadhim Jawad
Keyword(s):  
Finite Element ◽  
Parametric Study ◽  
Load Distribution ◽  
Shear Force ◽  
Bending Moment ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Simply Supported ◽  
Girder Bridges ◽  
Load Distribution Factors

Composite box-girder bridges are recently used in modern highway urban system because of their profitable and structural aptitude advantages. North Americans Codes of Practice specify empirical equations for girder moment and shear forces in such bridges in the form of live load distribution factors. These factors were proven to be conservative in some cases and underestimate the response in other cases. Therefore, an extensive parametric study, using the finite-element modeling, was conducted to examine the key parameters that influence the load distribution factors of such bridges. A total of 276 prototype bridges were analyzed to evaluate girder bending moment, shear force and deflection distribution factors for simply-supported composite multiple box-girder bridges when subjected to CHBDC truck loading. Design parameters considered in this study were bridges span length, numbers of design lanes, number of box girders and girder spacing. Based on the data generated from parametric study, sets of simple empirical expressions were developed for bending moment; shear force and deflection distribution factors for such bridges. A correlation between the finite-element results with CHBDC and AASHTO-LRFD empirical expressions showed the former are more reliable in structural design of composite box-girder bridges.

scholarly journals Transverse reinforcement contribution in shear – remarks from experimental research

2014 ◽  
Vol 13 (3) ◽  
pp. 135-142
Author(s):  
Rafał Ostromęcki
Keyword(s):  
Experimental Research ◽  
Shear Force ◽  
Shear Loading ◽  
Transverse Force ◽  
Constitutive Law ◽  
Transverse Reinforcement ◽  
Longitudinal Reinforcement ◽  
Simply Supported

The results of research for transverse reinforcement contribution in shear are presented in the article. Tests were made on the single span, simply supported beams. Resistance gauges were used to measure the strain on the stirrups at points crossing the artificial crack, formed with the thin, greased plate. Basing on the constitutive law for the stirrups steel derived in test, the force in stirrups was invented VEd,s. Such an attitude allowed to compare the force carried by stirrups VEd,s with the actual shear loading VEd. In the performed test made the stirrups contribution was between 52 and 72% of shear force. It was also noticed, that longitudinal reinforcement carried some transverse force as well. This ability is usually neglected in shear theories.

Evaluation of Transverse Shear Effect on Film Delamination in Blister Test

2010 ◽  
Vol 132 (1) ◽  
Author(s):  
Wei Wang ◽  
Yong Huang ◽  
Nicole Coutris ◽  
Hongseok Noh ◽  
Peter J. Hesketh
Keyword(s):  
Film Thickness ◽  
Energy Release Rate ◽  
Energy Release ◽  
Phase Angle ◽  
Release Rate ◽  
Transverse Shear ◽  
Shear Force ◽  
Shear Effect ◽  
Blister Test ◽  
Elastic Mismatch

The transverse shear effect has been frequently ignored in determining the debonding-related energy release rate and the phase angle in the blister test, resulting in underestimated values. This study aims to study the effect of shear force on the energy release rate and phase angle prediction in the blister test. A generalized approach is proposed to predict them under the effect of shear force. The predictions show that when the ratio of the film thickness to the debonded film window radius is large (such as 0.05), the transverse shear effect cannot be ignored in determining the energy release rate and the phase angle. The study also further illustrates the importance of including the shear force contribution in estimation and how this importance depends on the film thickness to debonded radius ratio, as well as the elastic mismatch.

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