Localized Stresses Combined With Geometric Discontinuities: Study of a Shaft

2012 ◽  
Author(s):  
Ricardo M. Amé ◽  
Gabriel M. Dasso
Keyword(s):  
Stress Concentration ◽  
Lateral Pressure ◽  
Von Mises Stress ◽  
Classical Literature ◽  
Single Section ◽  
Fillet Radius ◽  
Geometric Discontinuities ◽  
Concentration Factors ◽  
Stress Concentration Factors ◽  
Von Mises

Due to its functional characteristics, machine components are designed with various geometrical discontinuities, usually combined in a single section or sections very close. Localized stresses they generate are difficult to obtain if not by computer. The classical literature offers no stress concentration factors for cases as common as those seen in, for example, the design of a shaft, where they coexist, with various geometric discontinuities, efforts as torque and bending combined. In this work we present and analyze the results obtained from the Von Mises stress occurring in areas of a shaft with a change in diameter and a keyway, considering the load applied as a lateral pressure from the key generated to transmit a given torque. It is also considered a bending effort. The objective is to obtain the Von Mises stress values for different positions of the keyway with respect to the fillet radius for the change in diameters and also to find the influence of the proximity of the keyway on the values of the stress in the fillet radius.

scholarly journals DESCRIBING STRESS CONCENTRATION FACTORS OF AN INTERNALLY PRESSURIZED CYLINDER WITH AN IMBEDDED HOLE BY NEW FORMULATION

2020 ◽  
Author(s):  
javad jafari fesharaki
Keyword(s):  
Stress Concentration ◽  
Three Dimensional ◽  
Fe Analysis ◽  
Internal Diameter ◽  
Concentration Factors ◽  
Stress Concentration Factors ◽  
New Formulation ◽  
Von Mises ◽  
Von Mises Stresses ◽  
Pressurized Cylinder

The purpose of this paper is to investigate the stress concentration factor(SCF) for an internallypressurized cylinder with hole and based on detailed three-dimensional elastic FE analysis, a newcomprehensive set of formulas for SCFs are proposed. These stress concentration factors are presentedand discussed as a function of the ratio of cylinder diameter to the thickness of cylinder and hole diameter.The first ratio “D/100t” is equal to 1, 1.25, 1.5, 1.75, 2, 2.5, 2.75, 3, 3.25 and 3.5 and the second ratio“D/10d”, cylinder internal diameter to the hole diameter, varies from 0.6, 0.9, 1.2, 1.5, 1.8, 2, 2.3, 2.7,3.1and 3.5. Results are also presented for SCF of longitudinal, circumferential and Von Mises stresses.

Local Flexibility Coefficients for the Built-in Ends of Beams and Plates Including the Effects of Foundation Fillet Radii

1979 ◽  
Vol 101 (3) ◽  
pp. 249-254 ◽  
Author(s):  
J. L. Gordon ◽  
D. P. Jones
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Finite Element Analyses ◽  
Considerable Influence ◽  
Fillet Radius ◽  
Quarter Plane ◽  
Local Flexibility ◽  
The Mean ◽  
Concentration Factors ◽  
Stress Concentration Factors

The local deformations at the built-in end of a beam or plate re-entrant corner have considerable influence upon the redundant forces and moments at the juncture, and hence, upon the stresses. The effects of these local flexibilities are quite significant at nozzle-to-vessel intersections, head-to-shell junctures, tubesheet-to-heat exhanger shell junctures, and the like. Methods are available in the literature which permit the incorporation of the additional flexibility of the juncture into a structural analysis, but these methods do not adequately consider the influence of the transition fillet radius. Presented in this paper is the dependency on the fillet radius of the planar flexibility coefficients for the mean rotation and displacement due to bending and shear acting on a quarter-plane support. These relationships are obtained from elastic finite-element analyses of a quarter-plane support and are presented in a form that may be easily incorporated into design methodologies. Also, presented are the stress concentration factors in the fillet and a numerical example illustrating the significance of the results.

Stress-concentration factors for shoulder fillets and grooves in plates

1973 ◽  
Vol 8 (1) ◽  
pp. 43-51 ◽  
Author(s):  
I H Wilson ◽  
D J White
Keyword(s):  
Stress Concentration ◽  
Fillet Radius ◽  
Engineering Sciences ◽  
Concentration Factors ◽  
Stress Concentration Factors

Stress-concentration factors have been determined photoelastically for shoulder fillets and grooves in plates subjected to tension and bending. The parameters were mainly outside the range of previously published work which is also critically examined. The validity of Neuber's analysis for grooved plates is confirmed. The new results on shouldered plates provide a useful extension to Engineering Sciences Data Unit item no. 69020 for small values of r/d and values of D/d from 1.01 to 1.5, where r is the fillet radius, D is the greater width, and d the smaller width of the plate. These results for plates may be applied to shouldered shafts without the incurring of serious error.

scholarly journals Stress Concentration Factors for Welded Plate T-Joints Subjected to Tensile, Bending and Shearing Loads

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 546
Author(s):  
Krzysztof L. Molski ◽  
Piotr Tarasiuk
Keyword(s):  
Stress Concentration ◽  
Plate Thickness ◽  
Percentage Error ◽  
Geometrical Parameters ◽  
T Joints ◽  
Loading Mode ◽  
Weld Toe ◽  
Concentration Factors ◽  
Parametric Expression ◽  
Stress Concentration Factors

The paper deals with the problem of stress concentration at the weld toe of a plate T-joint subjected to axial, bending, and shearing loading modes. Theoretical stress concentration factors were obtained from numerical simulations using the finite element method for several thousand geometrical cases, where five of the most important geometrical parameters of the joint were considered to be independent variables. For each loading mode—axial, bending, and shearing—highly accurate closed form parametric expression has been derived with a maximum percentage error lower than 2% with respect to the numerical values. Validity of each approximating formula covers the range of dimensional proportions of welded plate T-joints used in engineering applications. Two limiting cases are also included in the solutions—when the weld toe radius tends to zero and the main plate thickness becomes infinite.

scholarly journals The effect of fillet radius and length of the thick-walled cylinder on Von Mises stress and safety factor for rocket motor case

2020 ◽  
Author(s):  
Lasinta Ari Nendra Wibawa ◽  
Kuncoro Diharjo ◽  
Wijang Wisnu Raharjo ◽  
Bagus Hayatul Jihad
Keyword(s):  
Safety Factor ◽  
Rocket Motor ◽  
Von Mises Stress ◽  
Fillet Radius ◽  
Von Mises ◽  
Walled Cylinder

Stress Analysis of Holes in Thick Plates

2004 ◽  
Vol 1-2 ◽  
pp. 153-158 ◽  
Author(s):  
S. Quinn ◽  
Janice M. Dulieu-Barton
Keyword(s):  
Stress Concentration ◽  
Stress Analysis ◽  
Uniaxial Tension ◽  
Plane Stress ◽  
Plate Surface ◽  
Flat Plates ◽  
Thick Plates ◽  
Concentration Factors ◽  
Stress Concentration Factors

A review of the Stress Concentration Factors (SCFs) obtained from normal and oblique holes in thick flat plates loaded in uniaxial tension has been conducted. The review focuses on values from the plate surface and discusses the ramifications of making a plane stress assumption.

Sign in / Sign up

Export Citation Format

Share Document