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Cyclic fatigue

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870325
EISBN: 978-1-62708-344-7
...Abstract Abstract This chapter discusses the effect of fatigue on polymers, ceramics, composites, and bone. It begins with a general comparison of polymers and metals, noting important differences in microstructure and cyclic loading response. It then presents the results of several studies...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610147
EISBN: 978-1-62708-303-4
.... Source: Ref 2 Fig. 8 Endurance limit versus hardness for steels. Source: Ref 7 Fig. 11 Effect of mean stress on fatigue life. Source: Ref 5 Fig. 12 Comparison of Goodman, Gerber, and Soderberg relationships. Source: Ref 2 Fig. 15 Hysteresis loop for cyclic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
...Abstract Abstract Strain-range partitioning is a method for assessing the effects of creep fatigue based on inelastic strain paths or strain reversals. The first part of the chapter defines four distinct strain paths that can be used to model any cyclic loading pattern and describes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060083
EISBN: 978-1-62708-343-0
... there to describe how fatigue life can be estimated from ductility measurements when cyclic data are unavailable or are likely to change. It also explains how cyclic life is influenced by the time-dependent nature of creep-plasticity and the physical and metallurgical effects of environmental exposure. creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
...Abstract Abstract This chapter examines the stress-strain characteristics of metals and alloys subjected to cyclic loading and the cumulative effects of fatigue. It begins by explaining how a single load reversal can lower the yield stress of a material and how repeated reversals can cause...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540297
EISBN: 978-1-62708-309-6
... System for Classification of Advanced Ceramics C 1322 Standard Practice for Fractography and Characterization of Fracture Origins in Advanced Ceramics C 1361 Standard Practice for Constant-Amplitude, Axial Tension-Tension Cyclic Fatigue of Advanced Ceramics at Ambient Temperature C 1368...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
... energy creep curves creep fatigue creep rupture testing creep strain cyclic loading deformation maps grain-boundary cracking CREEP is time-dependent deformation that occurs at high temperature relative to the melting point of metallic materials. The creep regime for metals is commonly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060223
EISBN: 978-1-62708-343-0
... to improve the creep-fatigue behavior of these otherwise promising materials. It addresses six areas that have been the focus of intense research, including thermal-expansion and elastic-viscoplastic mismatch, thermally induced biaxiality and interply stresses, creep and cyclic relaxation of residual...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
... Abstract Abstract Boiler tubes subjected to cyclic or fluctuating loads over extended periods of time are prone to fatigue failure. Fatigue can occur at relatively low stresses and is implicated in almost 80% of the tube failures in firetube boilers. This chapter covers the most common forms of boiler...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870179
EISBN: 978-1-62708-344-7
...Abstract Abstract This chapter describes how notches affect the load-carrying capacity and fatigue life of materials under cyclic loads. It explains that stresses and strains can be three to four times higher in the vicinity of a notch, greatly accelerating fatigue damage. It discusses the use...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870075
EISBN: 978-1-62708-344-7
...Abstract Abstract This chapter discusses the concept of mean stress and explains how it is used in fatigue analysis and design. It begins by examining the stress-strain response of test samples subjected to cyclic forces and strains, noting important features and what they reveal about...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... cycled forever; that is, it has a definite endurance limit. On the other hand, aluminum alloys do not have an endurance limit; if enough cycles are applied at even very low loads, they will eventually fail in fatigue. Fig. 1 The process of fatigue. (a) Cyclic loading. (b) Fatigue life of steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610327
EISBN: 978-1-62708-303-4
...-weight PMMA Rubber-toughened PMMA High-impact polystyrene Acrylonitrile-butadiene-styrene Polycarbonate Toughened polycarbonate copolyester PMMA, polymethyl methacrylate. Source: Ref 27 Fig. 29 Effect of cyclic frequency on fatigue crack growth rates in (a) polystyrene...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060231
EISBN: 978-1-62708-343-0
... time of exposure to operation, the cyclic fatigue mechanism was suspected as being responsible. All cracks were located at the root of a sharp stress concentration that had been machined into the pilot rib on the downstream side of the disk. A summary of the disk-cracking data for the first 16 disks...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870045
EISBN: 978-1-62708-344-7
... to be different. As we shall see later, it is the amount of cyclic plastic strain that governs life, and we can be quite certain that the fatigue lives will not, indeed, all be equal. But an S - N curve for un-notched material, basing life only on stress range, would surely not tell us how the fatigue lives...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870157
EISBN: 978-1-62708-344-7
... Determination of stress distribution in a rotating beam from axial strain-cycling fatigue data. (a) Total strain range-life relation for material. (b) Strain distribution in cross section of rotating beam. (c) Cyclic stress range-strain range relation for material. (d) Hysteresis loop for points at radius r...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200083
EISBN: 978-1-62708-354-6
...) the strain range approach for low cycle fatigue, and 3) the fracture mechanics approach. The S-N curve approach is the oldest and perhaps most common fatigue design technique. It deals with high cycle fatigue, that is, cyclic lives greater than 10 5 cycles. At long lives, in the absence of pre-existing...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780055
EISBN: 978-1-62708-281-5
... relaxation becomes an important design consideration; for cyclic loading, fatigue failure is an important consideration. In the next five sections, stiffness, strength, impact, creep/stress relaxation, and fatigue behavior are related to part performance. More details of these important design issues can...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... in the critical area and three stress levels (S 1 , S 2 , and S 3 ), which are the maximum cyclic tensile stress to which the grains are subjected. Successively higher stresses automatically cause more fatigue origins to form. Fig. 7 Striations generated on a spectrum-loaded test article. Source: Ref 2...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240243
EISBN: 978-1-62708-251-8
.... A comparison of the S - N curves for steel and aluminum is shown in Fig. 14.4 . Note that steel not only has a higher fatigue strength than aluminum, but it also has an endurance limit. Below a certain stress level, the steel alloy will never fail due to cyclic loading alone. On the other hand, aluminum...