Evaluation of potential composite application in ship shaftlines 2. Theoretical study of the crack-nucleation threshold and load-carrying capacity of [0o/±ϕ] laminated composites loades in shear and uniaxial tension or compression in the reinforcement plane

1996 ◽  
Vol 32 (1) ◽  
pp. 39-47 ◽  
Author(s):  
V. L. Kulakov ◽  
N. A. Panfilov ◽  
G. G. Portnov
Keyword(s):  
Uniaxial Tension ◽  
Carrying Capacity ◽  
Theoretical Study ◽  
Crack Nucleation ◽  
Laminated Composites ◽  
Load Carrying Capacity ◽  
Load Carrying

A Theory of Liquid-Solid Lubrication in Elastohydrodynamic Regime

1989 ◽  
Vol 111 (3) ◽  
pp. 440-444 ◽  
Author(s):  
M. M. Khonsari ◽  
S. H. Wang ◽  
Y. L. Qi
Keyword(s):  
Particle Size ◽  
Film Thickness ◽  
Carrying Capacity ◽  
Theoretical Study ◽  
Solid Particles ◽  
Solid Lubrication ◽  
Load Carrying Capacity ◽  
Line Contact ◽  
Load Carrying ◽  
Bounding Surfaces

A theoretical study of the effectiveness of solid particles dispersed in oil in the elastohydrodynamic line contact is presented. The analysis includes the variation of the viscosity and density of the lubricant as a function of pressure. The deformation of solid particles and that of the bounding surfaces are taken into consideration. Results are presented for the variation of the film thickness and the load carrying capacity as a function of the particle size, concentration, and properties of various types of particles.

Influence of Shape Defects and Surface Roughness on the Hydrodynamics of Lubricated Systems

1974 ◽  
Vol 16 (3) ◽  
pp. 156-159 ◽  
Author(s):  
D. Berthe ◽  
B. Fantino ◽  
J. Frêne ◽  
M. Godet
Keyword(s):  
Surface Roughness ◽  
Carrying Capacity ◽  
Reynolds Equation ◽  
Theoretical Study ◽  
Film Formation ◽  
Ball Bearings ◽  
Load Carrying Capacity ◽  
Lubricated Contacts ◽  
General Law ◽  
Load Carrying

In lubricated contacts, precision of shape governs film formation, load-carrying capacity and reliability. A theoretical study of systems containing shape defects, led the authors to consider a more general law than the classical Reynolds equation, which can separately take into account the shape defects of each surface. An application of this equation shows that shape defects can introduce harmful vibrations in ball bearings.

Study of the Lubricant Supply Arrangement in Non Recessed Hybrid Journal Bearing

2013 ◽  
Author(s):  
Vijay Kumar Dwivedi ◽  
Satish Chand ◽  
K. N. Pandey
Keyword(s):  
Steady State ◽  
Carrying Capacity ◽  
Theoretical Study ◽  
Journal Bearing ◽  
Load Carrying Capacity ◽  
Optimum Location ◽  
Steady State Condition ◽  
Load Line ◽  
Load Carrying ◽  
Lower Load

The present work is focused on the theoretical study of the performance of journal bearing operating under steady state condition, with particular emphasis on the influence of lubricant supply arrangements. In this paper the influence of the location of the grooves with respect to the load line and influence of groove dimensions on the performance parameter were investigated. The optimum location of the groove axis lies between 60° to 90° to the load line. It is also concluded that smaller groove length yielded lower load carrying capacity.

scholarly journals Notched Hollow Square Section Steel Column Buckling

2019 ◽  
Vol 4 (1) ◽  
pp. 81-84
Author(s):  
Zia Razzaq ◽  
Solomon Tecleab
Keyword(s):  
Carrying Capacity ◽  
Laboratory Experiments ◽  
Theoretical Study ◽  
Buckling Load ◽  
Load Carrying Capacity ◽  
Column Buckling ◽  
Buckling Loads ◽  
Steel Columns ◽  
Load Carrying ◽  
Steel Column

Presented in this paper is an outcome of a study to assess the effect of section loss in the form of longitudinal notches on the buckling load of hollow square section steel columns. The theoretical study includes buckling load estimates based on both an iterative equilibrium as well as a non-iterative energy approach. Buckling loads based on sample laboratory experiments are also presented. The study shows that the presence of a notch can significantly reduce the axial load-carrying capacity of a steel column.   

Influence of Yield Strength Variability over Cross-Section to Steel Beam Load-Carrying Capacity

2005 ◽  
Vol 10 (2) ◽  
pp. 151-160 ◽  
Author(s):  
J. Kala ◽  
Z. Kala
Keyword(s):  
Yield Strength ◽  
Cross Section ◽  
Carrying Capacity ◽  
Bending Moment ◽  
Statistical Characteristics ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Strength Variability ◽  
Hot Rolled ◽  
Hot Rolled Steel

Authors of article analysed influence of variability of yield strength over cross-section of hot rolled steel member to its load-carrying capacity. In calculation models, the yield strength is usually taken as constant. But yield strength of a steel hot-rolled beam is generally a random quantity. Not only the whole beam but also its parts have slightly different material characteristics. According to the results of more accurate measurements, the statistical characteristics of the material taken from various cross-section points (e.g. from a web and a flange) are, however, more or less different. This variation is described by one dimensional random field. The load-carrying capacity of the beam IPE300 under bending moment at its ends with the lateral buckling influence included is analysed, nondimensional slenderness according to EC3 is λ¯ = 0.6. For this relatively low slender beam the influence of the yield strength on the load-carrying capacity is large. Also the influence of all the other imperfections as accurately as possible, the load-carrying capacity was determined by geometrically and materially nonlinear solution of very accurate FEM model by the ANSYS programme.

Fuzzy Sets Theory in Comparison with Stochastic Methods to Analyse Nonlinear Behaviour of a Steel Member under Compression

2005 ◽  
Vol 10 (1) ◽  
pp. 65-75 ◽  
Author(s):  
Z. Kala
Keyword(s):  
Fuzzy Sets ◽  
Carrying Capacity ◽  
Stochastic Methods ◽  
Nonlinear Behaviour ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Input Parameters ◽  
Stochastic Solution ◽  
Fuzzy Solution ◽  
Sets Theory

The load-carrying capacity of the member with imperfections under axial compression is analysed in the present paper. The study is divided into two parts: (i) in the first one, the input parameters are considered to be random numbers (with distribution of probability functions obtained from experimental results and/or tolerance standard), while (ii) in the other one, the input parameters are considered to be fuzzy numbers (with membership functions). The load-carrying capacity was calculated by geometrical nonlinear solution of a beam by means of the finite element method. In the case (ii), the membership function was determined by applying the fuzzy sets, whereas in the case (i), the distribution probability function of load-carrying capacity was determined. For (i) stochastic solution, the numerical simulation Monte Carlo method was applied, whereas for (ii) fuzzy solution, the method of the so-called α cuts was applied. The design load-carrying capacity was determined according to the EC3 and EN1990 standards. The results of the fuzzy, stochastic and deterministic analyses are compared in the concluding part of the paper.

Pavement Damage Due to Conventional and New Generation of Wide-Base Super Single Tires

2005 ◽  
Vol 33 (4) ◽  
pp. 210-226 ◽  
Author(s):  
I. L. Al-Qadi ◽  
M. A. Elseifi ◽  
P. J. Yoo ◽  
I. Janajreh
Keyword(s):  
Carrying Capacity ◽  
Material Properties ◽  
Three Dimensional ◽  
Fe Analysis ◽  
Load Carrying Capacity ◽  
Inflation Pressure ◽  
3D Finite Element ◽  
Load Carrying ◽  
Pavement Damage ◽  
New Generation

Abstract The objective of this study was to quantify pavement damage due to a conventional (385/65R22.5) and a new generation of wide-base (445/50R22.5) tires using three-dimensional (3D) finite element (FE) analysis. The investigated new generation of wide-base tires has wider treads and greater load-carrying capacity than the conventional wide-base tire. In addition, the contact patch is less sensitive to loading and is especially designed to operate at 690kPa inflation pressure at 121km/hr speed for full load of 151kN tandem axle. The developed FE models simulated the tread sizes and applicable contact pressure for each tread and utilized laboratory-measured pavement material properties. In addition, the models were calibrated and properly validated using field-measured stresses and strains. Comparison was established between the two wide-base tire types and the dual-tire assembly. Results indicated that the 445/50R22.5 wide-base tire would cause more fatigue damage, approximately the same rutting damage and less surface-initiated top-down cracking than the conventional dual-tire assembly. On the other hand, the conventional 385/65R22.5 wide-base tire, which was introduced more than two decades ago, caused the most damage.

Load carrying capacity of cylindrical shells

2020 ◽  
Vol 2020 (21) ◽  
pp. 146-153
Author(s):  
Anatolii Dekhtyar ◽  
◽  
Oleksandr Babkov ◽  
Keyword(s):  
Carrying Capacity ◽  
Cylindrical Shells ◽  
Load Carrying Capacity ◽  
Load Carrying
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