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fatigue life analysis

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Published: 01 March 2006
Fig. 4.25 Analysis of tensile mean stress effects on fatigue life on the basis of loss of ductility caused by necessity to maintain the cyclic stress-strain curve exactly the same fracture stress of 848 MPa (123 ksi) More
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Published: 01 August 2005
Fig. 3.51 Flow diagram of a strain-life fatigue analysis procedure. Equivalent damage strain amplitude was corrected for the mean stress effect. More
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Published: 01 December 2003
Fig. 1 Schematic of specimens used for total-life fatigue analysis. Tests can be done (a) in torsion, (b) with a rotating cantilever, (c) with a rotating beam, (d) with cantilever reverse bending, or (e) under axial loading More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540383
EISBN: 978-1-62708-309-6
... Abstract Fatigue life analysis and crack growth life prediction require an accurate interpretation of the load spectrum. This appendix presents two methods for interpreting load spectra and provides several data plots and tables comparing fatigue test data with analytically predicted values...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060155
EISBN: 978-1-62708-343-0
... General Rules for Fatigue Life Analysis in Multiaxial Loading Step 1: Principal Stress-Strain Analysis Step 2: Creep and Plastic Strain Separation Step 3: Equivalent Strain Step 4: Dominant and Secondary Directions Biaxial Stresses Triaxial Stresses Step 5: Partitioned Strain Ranges...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... their use on different metals and alloys. The chapter also discusses design-based approaches for preventing fatigue failures. crack initiation crack propagation fatigue analysis fatigue fracture appearance fatigue life fatigue strength THE DEFINITION OF “FATIGUE” according to ASTM Standard E...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540379
EISBN: 978-1-62708-309-6
... arbitrary element along the potential crack path can therefore be determined using an appropriate stress analysis based on the theory of elasticity. The total life of each element can be calculated from the fatigue properties (i.e., strain amplitude/cycles to failure curve) of the material and the strain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060231
EISBN: 978-1-62708-343-0
.... , Nonlinear Structural and Life Analyses of a Combustor Liner , Comput. Struct. , Vol 16 (No. 1–4) , 1983 , p 509 – 515 10.1016/0045-7949(83)90191-8 10.14 Manson S.S. Halford G.R. and Hirschberg M.H. , Creep-Fatigue Analysis by Strain-Range Partitioning , Proc. of First...
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
... reversed stress amplitude vs. fatigue life relationship for 300M Fig. 4.33 Determination of constants Q and P for 300M steel Fig. 4.34 Comprehensive model for mean stress representation of fatigue results for 300M steel. Q = 4.83; P = –0.139 Fig. 4.29 Extension of data...
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
... S.S. , Predictive Analysis of Metal Fatigue in the High Cycle Life Range , Methods for Predicting Material Life in Fatigue , American Society of Mechanical Engineers , New York , 1979 , p 145 – 182 3.27 Peterson R.E. , Fatigue of Metals—Engineering and Design Aspects, The 1962...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870123
EISBN: 978-1-62708-344-7
... = 109,620 cycles. We can now establish the location of points B and B ′ of Fig. 6.27 . The resulting strain-life relation for the material is shown in the figure. The implication of this construction is that it is this life relation that should be used in cumulative fatigue analysis. First, let us...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040295
EISBN: 978-1-62708-300-3
... fatigue fracture has long been one of the most important issues in cold forging. Therefore, a fatigue analysis method that can be utilized to estimate tool life has been developed and can be summarized as follows ( Fig. 22.10 ) [ Knoerr et al., 1994 , and Matsuda, 2002 ]: The forging process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
.... The fatigue methodology adopted in the ASIP was the reliability approach, which became known as the safe-life method. This safe-life approach, used in the development of USAF aircraft in the 1960s, involved analysis and testing to 4 times the anticipated service life. On the commercial scene, another...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... in material that may lead to premature gear fatigue failure. The topics covered are alignment, gear tooth, surface durability and breakage of gear tooth, life determined by contact stress and bending stress, analysis of gear tooth failure by breakage after pitting, and metallurgical flaws that reduce the life...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320049
EISBN: 978-1-62708-332-4
... conditions, and obtains the component loads. Process: The analyst conducts the numerical analysis on the computer using a commercial software package. Post-process: The analyst prints and plots the Von Mises stresses, deflections as a measure of stiffness, and fatigue life. Figure 5.9 provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060173
EISBN: 978-1-62708-343-0
... This chapter provides a detailed review of creep-fatigue analysis techniques, including the 10% rule, strain-range partitioning, several variants of the frequency-modified life equation, damage assessment based on tensile hysteresis energy, the OCTF (oxidation, creep, and thermomechanical fatigue) damage model...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... Tightness Damage Mechanisms in Casings Modifications of Heat Treatment and Alloy Content Advanced Manufacturing Technologies Integrated Methodology Creep-Fatigue-Crack Growth Life-Assessment Procedure Remaining-Life Analysis of Blades Blade Materials and Properties Steam-Turbine...
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
... a selected surface strain. From the selected surface strain, a fatigue life can be established and similarly nominal stresses from the required bending moment. Thus, we establish the relation between nominal elastic stresses and fatigue life. Figure 7.3 shows the notation used in the analysis. We...
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
... depends on the specific specimen geometry. Thus, the Paris law becomes: (Eq 14.15) d a d n = C ( Y Δσ π a ) m One of the goals of fatigue analysis is to be able to predict the fatigue life of structures. The fatigue life, n , can be solved for by rearranging Eq 14.13...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930163
EISBN: 978-1-62708-359-1
... overall structural integrity, even under accident or overload conditions. Fatigue Design The fatigue life of a welded structure is almost invariably limited by the fatigue life of the weld details. As a result, the design stresses in welded structures that are subjected to cyclic loading...