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cyclic straining

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870009
EISBN: 978-1-62708-344-7
...Abstract Abstract This chapter provides a detailed analysis of the cyclic stress-strain behavior of materials under uniaxial stress and strain cycling. It first considers the case of a stable material under constant-amplitude strain cycling then broadens the discussion to materials that harden...
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...
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
..., describes the statistical nature of fatigue measurements, and explains how plastic strain causes cyclic hardening and softening. It discusses the work of Wohler, Basquin, and others and how it led to the development of a strain-based approach to fatigue and the use of fatigue strength and ductility...
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 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 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
... of creep strain and strain rate equations, explains how to determine creep constants, and reviews the findings of several studies on cyclic loading. It also discusses the development of a novel test that measures the cyclic creep-rupture resistance of materials in tension and compression. activation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060083
EISBN: 978-1-62708-343-0
... strains for use by the method of SRP. This chapter covers analytical and experimental techniques for partitioning creep and plastic strains. Empirical models also can estimate the SRP life relationships when limited or no cyclic data are available. In addition, this chapter discusses the physical...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060223
EISBN: 978-1-62708-343-0
... and strains are superimposed on mechanically imposed stresses and strains. The strains combine algebraically and adversely interact with environmental attack mechanisms. The result is a complex cyclic variation of strain, stress, temperature, with superimposed time-dependent creep, diffusion, oxidation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
...Abstract Abstract This chapter discusses the failure mechanisms associated with fiber-reinforced composites. It begins with a review of fiber-matrix systems and the stress-strain response of unidirectional lamina and both notched and unnotched composite laminate specimens. It then explains how...
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
... stress to stress amplitude During cyclic loading within the elastic regime, stress and strain are directly related through the elastic modulus. However, for cyclic loading that produces plastic strains, the responses are more complex and form a hysteresis loop ( Fig. 14.10 ). From point O up...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870325
EISBN: 978-1-62708-344-7
... strengths (cast iron is an uncommon example), polymers usually do show such large differences. It is usual for compressive yield stress to exceed tensile values by 25% or more. The result is that in cyclic straining between equal tensile and compressive strain limits, compressive mean stresses develop...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140193
EISBN: 978-1-62708-335-5
... information as available. Compressive tangent modulus curves are presented for certain alloys. The effects of cyclic loading are given on several curves. aluminum alloys compressive tangent modulus curves cyclic hardening stress-strain curves This collection of stress-strain curves...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... conditions, generally accompanied by a cyclic softening phenomenon in plastics ( Ref 2 , 9 ). Under cyclic strain conditions, the fatigue response is best characterized by the cyclic stress-strain curve. This curve is created by testing several specimens subjected to a range of controlled cyclic strain...
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
... the stress-strain curve is shown in Fig. 3.3(a) . Suppose a material is strained to point A , and then completely reversed. The cyclic stress-strain path (hysteresis loop) is OAOA ′ O in Fig. 3.3(b) . Alternatively, the material could be strained to point B , the reversal giving loop BB ′ B ″ B...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060111
EISBN: 978-1-62708-343-0
... analysis by this method. The basic inelastic strain range versus cyclic life relationships for Δε PP , Δε CC , Δε CP , and Δε PC -type strain ranges are shown in Fig. 6.1(a) . They are shown as mildly temperature-dependent functions; although at least two materials (316 stainless steel and 2¼Cr-1Mo steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540297
EISBN: 978-1-62708-309-6
... stress levels are, counterclockwise starting from U: 15, 16, 17.4, 19.7, 21.6, 22.4, and 27.8 MPa (2.2, 2.3, 2.5, 2.9, 3.1, 3.2, and 4 ksi). Source: Ref 7.21 Thermohysteresis is why most (if not all) polymers exhibit cyclic strain softening in their cyclic stress-strain curves ( Fig. 7.14...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.9781627083447
EISBN: 978-1-62708-344-7
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490111
EISBN: 978-1-62708-340-9
... that controls failures occurring at N < 10 4 cycles and typically is of concern when there is significant cyclic plasticity. Skelton ( Ref 11 ) has shown that S-N curves based on LCF tests conducted at constant strain blend nicely with data from HCF tests, indicating that there are no fundamental...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870267
EISBN: 978-1-62708-344-7
.... High local monotonic or cyclic strains regardless of sign tend to reduce, or even annihilate, the residual stresses. Likewise, high temperature may anneal away the stresses associated with the residual strains. It is here, especially, where a distinction must be made between high-cycle and low-cycle...