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fatigue model

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540379
EISBN: 978-1-62708-309-6
... Abstract This appendix presents an analytical model that estimates damage rates for both crack initiation and propagation mechanisms. The model provides a nonarbitrary definition of fatigue crack initiation length, which serves as an analytical link between initiation and propagation analyses...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040295
EISBN: 978-1-62708-300-3
... Abstract This chapter addresses the issue of die failures in hot and cold forging operations. It describes failure classifications, fatigue fracture and wear mechanisms, analytical wear models, and the various factors that limit die life. It also includes several case studies in which finite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780249
EISBN: 978-1-62708-281-5
... 11 are functions of frequency, environment, loading conditions, and material properties. The inadequacy of the Paris equation to predict FCP rates at both low and high levels of Δ K has led to the development of the other fatigue models. This equation suggests that the rate of FCP...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
.... and Landes J.D. , Correlation Between Sustained-Load and Fatigue Crack Growth in High-Strength Steels , Material Research and Standards, TMRSA , Vol 9 , ASTM , 1969 , p 25 – 28 5.89. Liu A.F. , Assessment of a Time Dependent Damage Accumulation Model for Crack Growth at High...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030117
EISBN: 978-1-62708-282-2
... growth occurs mainly above the threshold stress intensity for static load cracking and is modeled through linear superposition of SCC and inert environment fatigue rates ( Ref 31 , 32 ). Fig. 25 Effect of stress-intensity range and loading frequency on corrosion fatigue crack growth in ultrahigh...
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
... 120. Nazmy M.Y. and Wuthrich C. , The Predictive Capability of Three High Temperature Low Cycle Fatigue Models in the Alloy IN 738 , in Mechanical Behavior of Materials IV , Carlsson J. and Ohlson N.G. , Ed., Pergamon Press , New York , 1984 10.1016/B978-1-4832-8372...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500273
EISBN: 978-1-62708-317-1
... in ISF is not yet comprehensively understood. Reference 13.12 attributes the large attainable strains in ISF to shear, Ref 13.13 to cyclic bending, and Ref 13.14 to the nonlinear strain paths; Ref 13.15 treats the limit strains using a low-cycle fatigue model. There are several factors...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
... and strain systems, failure mechanisms, and fatigue and fracture of these composites are covered here. Discussions will be kept in generic terms equally applicable to other composite systems whose laminae are reinforced with continuous fibers. References 8.1. Naslain P.R...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280365
EISBN: 978-1-62708-267-9
.../corrosion; and modeling. superalloys Although this book attempts to cover a wide range of topics on superalloys, owing to space and time limitations, it cannot include every development or facet of superalloy metallurgy. Consequently, a list of relevant papers that may be of interest to those...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
..., a , advances in length. Fig. 6 Coordinate system for crack-tip stresses in model I loading (see Eq 5 ) Fig. 7 Specimens employed in fatigue crack propagation studies. (a) Single-edge-notch specimen. (b) Compact-tension specimen Fracture mechanics provides a design approach...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
... Institute , Palo Alto, CA , Dec 1988 71. Nazmy M.Y. and Wuthrich C. , The Predictive Capability of Three High Temperature Low Cycle Fatigue Models in the Alloy IN 738 , in Mechanical Behavior of Materials IV , Carlsson J. and Ohlson N.G. , Ed., Pergamon Press , New...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540297
EISBN: 978-1-62708-309-6
... ISCC in (d) actually appears as K Ith in the source, which means threshold and is a common practice in the ceramics engineering community. The alteration was made to be in line with the models in Fig. 4.20 . Source: Ref 7.3 Cyclic slip is the basis for fatigue in metals; however...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540391
EISBN: 978-1-62708-309-6
... discusses stress severity factors associated with fastener holes in attachment joints. crack development fastener holes fatigue analysis stress severity factors THE STRESS SEVERITY FACTOR, K SSF , is an empirical factor that accounts for the geometrical stress concentration effect...
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
... will always cause a reduction in the fatigue life ( Fig. 14.8 ). A number of mathematical models have been developed that allow the effects of mean stress on stress amplitude to be predicted from fully reversed-bending data. Goodman developed a linear model, while Gerber used a parabolic model ( Fig. 14.9...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500289
EISBN: 978-1-62708-317-1
... Abstract This chapter describes joining by forming processes including riveting, clinching, crimping, and dieless joining techniques. It also discusses the fatigue behavior of clinched joints and the results of fatigue tests that compare clinched and spot welded joints. clinching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130241
EISBN: 978-1-62708-284-6
... Abstract This chapter discusses the various factors influencing the evaluation of fatigue fracture of nitrided layers. It begins by describing the problems of enhancing the fatigue resistance of machine components. The significance and detailed assessment of the effect of a structural flaw...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410021
EISBN: 978-1-62708-280-8
... (SDAS) of (a) 30 μm, solidification time 40 s; and (b) 60 μm, solidification time 360 s. Reprinted with permission from Ref 2 Fig. 3.5 Variation of yield and tensile strengths and elongations with DAS. Source: Ref 3 . Fig. 3.6 Relationship between fatigue life, pore size, and DAS...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... Abstract This chapter provides a brief review of industry’s battle with fatigue and fracture and what has been learned about the underlying failure mechanisms and their effect on product lifetime and service. It recounts some of the tragic events that led to the discovery of fatigue and brittle...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780267
EISBN: 978-1-62708-281-5
... to fatigue. Thus, the wear mechanism can change if the loading condition is changed. The authors provided a model for the wear of semicrystalline thermoplastics that resembles the Ratner-Lancaster model for abrasive wear of polymers; for microscopic surface wear: V ∝ L 3 / 2 R a 3...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... can be used to prevent this phenomenon. Static loading usually is considered to be responsible for SCC, while environmentally induced crack propagation due to cyclic loading is defined as corrosion fatigue (see the section “Corrosion Fatigue” in the article “Forms of Mechanically Assisted...