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strain ratcheting

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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
... strain ratcheting stress relaxation Introduction Origin of Mean Stress Mean Stress Effects on Fatigue Life A New Comprehensive Model (Manson) References References 4.1 Landgraf R.W. Richards F.D. and LaPointe N.P. , Fatigue Life Prediction for a Notched Member...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870325
EISBN: 978-1-62708-344-7
... cycled at various strain ranges. (a) Polypropylene at 298 K, Δε t = 8% ( Ref 12.4 ). (b) Nylon 6/6 at 298 K, Δε t = 12% ( Ref 12.3 ). (c) Polycarbonate at 298 K, Δε t = 10% ( Ref 12.3 ) Fig. 12.27 Maximum and minimum strain curves showing tensile ratcheting for specimen TH. Source: Ref 12.9...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060155
EISBN: 978-1-62708-343-0
... and Plastic Strain Separation Step 3: Equivalent Strain Step 4: Dominant and Secondary Directions Step 5: Partitioned Strain Ranges and Creep and Plastic Ratchet Strains Step 6: The Strain-Range Partitioning Life Relationships Step 7: Interaction Damage Rule Step 8: Triaxiality Factor...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060223
EISBN: 978-1-62708-343-0
... ; G = shear modulus in units of 10 6 × MPa Fig. 9.3 Cyclic strain resistance (from Δ T = 425 °C, or 800 °F) of SCS-6/Ti-15-3 metal-matrix composite in [0]32 direction with k f = 0.35. Source: Ref 9.3 Fig. 9.4 Severe thermal ratcheting due to elastic-viscoplastic property...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
...Summary of the types of embrittlement experienced by steel alloys Table 16.1 Summary of the types of embrittlement experienced by steel alloys Embrittlement type Steels susceptible Causes Result Strain-age embrittlement Low-carbon steel Precipitation after deformation processing...
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 November 2012
DOI: 10.31399/asm.tb.ffub.t53610147
EISBN: 978-1-62708-303-4
..., multiple fatigue origins are quite common with parts under high nominal stress; ratchet marks perpendicular to the surface separate adjacent fatigue areas. Source: Modified from Ref 20 Fig. 22 Log elastic strain versus log reversals to failure. Source: Ref 11 Fig. 23 Log transition...
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
... ratchet marks (small shiny areas at the surface) indicates that fatigue cracks were initiated at many locations along a sharp snap-ring groove. The eccentric pattern of oval beach marks indicates that the load on the shaft was not balanced; note the final rupture area (stage 3) near the left side...
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
... … Sulfur … 0.29 Chlorine (as chloride) … 0.61 Potassium … 0.38 Calcium … 0.82 Iron 69.00 56.12 Copper … 1.74 Fig. 6.149 SEM fractographs showing (a) fracture surface at OD edge with multiple ratchet marks, 35×. (b) Fatigue striations with corrosion deposits/scales...
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
...Abstract Abstract This chapter familiarizes readers with the methods used to quantify the effects of fatigue on component lifetime and failure. It discusses the development and use of S-N (stress amplitude vs. cycles to failure) curves, the emergence of strain-based approaches to fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130351
EISBN: 978-1-62708-284-6
.... (a) Black arrows show locations for SEM examination. (b) White arrows show fracture direction and location of metallographic sections. Fig. 36 Axle wall thickness, discolored region dimensions, and fracture location Fig. 1 As-received strain bar from fatigue testing of a hold-back bar...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130503
EISBN: 978-1-62708-284-6
... obtained in transvarestraint tests at 4% augmented strain. Source: Ref 53 , 54 Fig. 2 Wormhole or piping porosity in weld metal deposited by submerged arc welding. Plate is 19 mm thick. Fig. 3 Overview of pipe section. Cracking is visible on right end of the pipe at the toe...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
... direction Ratchet marks where origins join General wastage, roughening, pitting, or trenching Stress-corrosion and hydrogen damage may create multiple cracks that appear brittle Gouging, abrasion, polishing, or erosion Galling or storing in direction of motion Roughened areas...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
... of multiaxial straining for SRP and incorporation of damage due to independent or concurrent plastic and creep ratchet strains Genesis of the SRP Method The SRP concept arose out of extensive testing efforts to improve predictions when assessing the structural durability of high-temperature creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410315
EISBN: 978-1-62708-265-5
... constituted the third stage of wear. This sequence of deformation and fracture is repeated many times to produce substantial rail wear. Kapoor has referred to the repeated cycles of compressive deformation as plastic ratcheting and notes that cracking serves primarily to create the wear debris ( Ref 15.10...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060173
EISBN: 978-1-62708-343-0
...</xref> with predictions by various methods Table 8.3 Comparison of experimental cyclic lives for tests in Fig. 8.20 with predictions by various methods 1 2 3 4 5 6 7 8 9 Test actual Strain-range partitioning Frequency separation Hysteresis energy Time- and Cycle-Fraction Rule Damage...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
... of materials for better thermal shock resistance. Finally, if the body is subjected to thermal cycling conditions with superimposed net section loads, the component will undergo thermal ratcheting, which is the gradual accumulation of inelastic strains with cycles. Failure due to thermal ratcheting...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.9781627082709
EISBN: 978-1-62708-270-9