The structural stress concentration factors in table 8. Petersons stress concentration factors, 4th edition wiley. The problem of stressconcentration effects, produced by holes and notches in bars under tension is, of interest to. Petersons stress concentration factors by walter d. The value of the sensitivity index of a material depends on two factors, the type of the material and its micro structure. This site is like a library, use search box in the widget to get ebook that you want. The effective fatigue stress concentration factors of the machined surfaces were determined using the neuber rule 7 and arolaramulu model 8. The bar has an applied axial force tensile or compressive. Approximate stressconcentration factors k ts for a round bar or tube having a transverse round hole and loaded in torsion source. Factors from r e peterson design factors for stress concentration machine from ma 761 at hanover park high. Stress concentration factors are used in the design of mechanical or. Rudolph earl peterson petersons stress concentration factors establishes and maintains a system of data classification for all of the applications of stress and.
Stress concentration factor an overview sciencedirect. Stress concentration design factors 1953 and stress. Petersons stress concentration factors wiley online books. Peterson, stressconcentration factors, wiley, new york, 1974, pp. Petersons is the practitioners goto stress concentration factors reference includes completely revised introductory chapters on fundamentals of stress analysis.
Useful tables 1033 table a16 approximate stressconcentration factor kt for bending of a round bar or tube with a transverse round hole source. The particular stressconcentration factors determined are not available in the literature, and these factors should, therefore, be especially useful for design purposes. A textbook called fundamentals of machine component design and theres a textbook on metal fatigue that has various q factors. Index to the stress concentration factors xvii preface for the third edition xxxiii preface for the second edition xxxv 1 definitions and design relations 1 1. Pdf evaluation of stress concentration factor using ansys. Updated stress concentration factors for filleted shafts.
Petersons stress concentration factors is an excellent book for all mechanical, civil, and structural engineers, and for all engineering students and researchers. Interacting stress concentration factors and their effect on fatigue of metallic aerostructures by david warren whitley a dissertation presented to the faculty of the. Abstract this article presents numerical finite element method fem analysis. Stress analysis and stress concentration factors are.
Several catalogs of stress concentration factors have been published. Petersons stress concentration factors, third edition researchgate. From notches and grooves to shoulder fillets and holes, readers will learn everything they need to know about stress concentration in one single volume. Top 15 items every engineering student should have.
During the design phase, there are multiple approaches to estimating stress concentration factors. Published elastic stress concentration factors are shown to underestimate stresses in the root of a shoulder filleted shaft in bending by as much as 21 percent, and in tension by as much as forty percent. The maximum stress occurs on the inside of the hole, slightly below the shaft surface. Stressconcentration factors for superposed notches. Petersons stress concentration factors, 3rd edition wiley. Peterson s stress concentration factors download ebook. Pdf stress concentration factor formulas useful for any. Introduction development of mathematical and finite element analysis software together with improvements in computer technology provide a possibility for improving and simplifying existing mathematical models of stress concentration factors. When q0, kf 1, that is, no fatigue stress concentration effect when q1, kfk, that is, fatigue stress concentration has equal value of geometric stress concentration factor. Petersons stress concentration factors ebook, 2008. The mother specimen with opposite semicircular edge notch which has stress concentration factor 3 is designed to make the notch condition of real ship structure. Petersons stress concentration factors establishes and maintains a system of. L if notch sensitivity data is not available, it is conservative to use kt in fatigue calculations.
Stress concentration factors for circular, reinforced penetrations in pressurized cylindrical shells a dissertation presented to the faculty of the school of engineering and applied science university of virginia in partial fulfillment of the requirements for the degree doctor of philosophy civil engineering by james w. Peterson s stress concentration factors 2nd ind free download as pdf file. Interacting stress concentration factors and their effect. Peterson s stress concentration factors 2nd ind stress mechanics. Structures and materials section 7 stress concentration 1. Estimating the fatigue stress concentration factor of. Petersons stress concentration factors free download pdf.
This page provides a set of interactive plots for common stress concentration factors. Substantially revised and completely updated, this book presents stress concentration factors both graphically and with formulas. Other resources you can utilize to determine q include petersons stress concentration factors, shigleys textbook for mechanical engineering design. When there is a sudden change in the geometry of the body due to cracks sharp corners, holes and decrease in the cross section area, then there is an increase in the localised stress near these cracks, sharp corners, holes, and decreased cross section area. View table of contents for petersons stress concentration factors. Petersons stress concentration factors 3rd edition knovel. A stress concentration also called a stress raiser or a stress riser is a location in an object where the stress is significantly greater than the surrounding region. Features new research on stress concentration factors related to weld joints and composite materials. Petersons stress concentration factors is an excellent book for all mechanical, civil, and structural engineers, and. A number of different factors will have an influence on the needed fe.
Petersons stress concentration factors establishes and maintains a system of data classification for all of the applications of stress and strain analysis and expedites their synthesis into cad applications. The difference in stress concentration factors between single and doublesided supports can be neglected. Stress concentration factors are given for various common discontinuities. The keyway related stress is indeed fully three dimensional as also stated in peterson 18. Peterson, stress concentration factors, wiley, new york, 1974, pp. Stress concentration caused by sudden change in form a change in the geometric shape of a part gives rise to additional stress over and above the calculated stress, which is known as stress concentration. General values are also given for keyways, gear teeth, screw threads and welds. Stress concentration factors and notch sensitivity lecture 4 engineering 473 machine design. Peterson s stress concentration factors third edition stress concentration factors r. Approximate stressconcentration factors kts for a round bar or tube having a transverse round hole and loaded in torsion source. The numerical calculations are shown by points and the full lines are the curve fit to the data, see equation 24 fig. The definitive guide to stress concentration, newly revised and updated.
What is stress concentration definition, causes, effects. L convenient to think of kf as a stress concentration factor reduced from kt because of lessened sensitivity to notches. Geometric stress concentration factors bending example spotts, fig. The actual fatigue notch factors for the machined surfaces were estimated using experimental results from tensiontension fatigue tests.
Fillet and groove stress concentrations springerlink. Takes a deep dive into the theory and methods for material characterization, quantification and analysis methods of stress and strain, and static and fatigue design. Features new research on stress concentration factors related to weld joints and composite materials takes a deep dive into the theory and methods for material characterization, quantification and analysis methods of stress and strain, and static and fatigue design petersons stress concentration factors is an excellent book for all mechanical. Compendiums of stress concentrations factors such as stress concentration factors, r. Apm5611 stress concentration produced by holes and notches by a. Stress concentration caused by sudden change in form. Fatigue stress concentration factors lkf is normally used in fatigue calculations but is sometimes used with static stresses. Peterson s stress concentration factors 3rd edition. Petersons stress concentration factors establishes and maintains a system of data. Stress concentrations in keyways and optimization of. Stress concentration factor formulas useful for any dimensions of shoulder fillet in a flat test specimen under tension and bending article pdf available in journal of testing and evaluation 32. Click download or read online button to get peterson s stress concentration factors book now. Structures and materials section 7 stress concentration. Pdf peterson s stress concentration factors download.
Stress concentration is the accumulation of stress in a body due to sudden change in its geometry. Stress concentration at loadcarrying fillet welded. This paper deals with the determination of stress concentration factors using numerical methods. Charts of theoretical stressconcentration factors k. Stress concentrations occur when there are irregularities in the geometry or material of a structural component that. Factors from r e peterson design factors for stress. For the new third edition, new material will be added covering finite element analyses of stress concentrations, as well as effective computational design. Stress concentration factors are used in the design of mechanical or engineering structures and machinery and have a tremendous impact on design of virtually. Petersons stress concentration factors is an excellent book for all.
The ratio of the true maximum stress to the stress calculated by the ordinary formulas of mechanics flexure formula, torsion formula, etc. Petersons stress concentration factors is an excellent resource for mechanical, civil, and structural engineering professionals, researchers, and. This tab defines the stress concentration factor for a bar with a rectangular cross section and a central circular hole. Stress concentration factors are used in the design of mechanical or engineering structures and machinery and have a tremendous impact on design of virtually every product or structure subject to environmental or userelated stress from nuclear equipment, deepsea vehicles, and aircraft to space vehicles, underground. Utilizing the birefringentcoating technique complemented with data from electricalresistance type of strain gages, the whole field stresses and stressco. A solution for twodimensional stressconcentration factors for superposed semicircular notches symmetrically placed at the edges of a strip under pure tension is proposed by the author. Petersons stress concentration factors, second edition. The cases of the bar with circular cross section and ushaped groove subjected to tension and. The width ratio bd is linked to the depth ratio through equation 22. Read pdf peterson s stress concentration factors 3rd edition synthesis into cad substantially revised and completely updated, this book presents stress concentration factors both graphically and with formulas. Theoretical approaches, using elasticity or strength of material considerations, can lead to equations similar to the one shown above. Section 7 stress concentration stress concentrations produced by discontinuities in structures such as holes, notches, and fillets will be introduced in this section.
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