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linear damage rule

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870123
EISBN: 978-1-62708-344-7
.... It then proceeds to demonstrate the methods commonly used to analyze cumulative fatigue damage and its effect on component life starting with the classical linear damage rule. After pointing out the inherent limitations of the model, it presents a method that incorporates two linear damage rules, one applying...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870001
EISBN: 978-1-62708-344-7
... to treat this problem by what was conceived as a double linear damage rule , one applicable before the initiation of a crack, another after a crack has started. For many years the senior author pursued this line of analysis according to a particular formulation he posited. In later years, however...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060231
EISBN: 978-1-62708-343-0
... stress-strain response at circumferential weld Fig. 10.18 Comparison of Damage Curve Approach with Linear Damage Rule Fig. 10.17 Cross section of a thin-walled pressure vessel at a circumferential weld. HAZ, heat-affected zone Fig. 10.20 Typical louvered-constructed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060069
EISBN: 978-1-62708-343-0
... with calculations made first by the Linear Damage Rule (LDR). Note that the IDR has no applicability for this series of experiments, because no concurrent SRP strain-range types are present in any of the applied cycles. A second set of calculations, however, invokes use of the principle of strain-range conversion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
... another, this is not a requirement of the method. Damage Rules for Concurrent Strain Ranges During the first year of development of SRP, we used a linear life fraction concept that, at the time and for the purity of tests that had been run, was reasonably accurate. We used the term Linear Damage...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
... ∊ in 3 0.35 5.2 0.33 3.8 Ostergren, with frequency modification σ max Δ ∊ in 3 0.32 6.5 0.30 3.3 Analogous to ASME code Δ ∊ in , σ 4 0.31 4.8 0.32 4.5 SRP-linear damage rule Δ ∊ in 8 0.31 3.0 0.33 3.0 SRP-interaction damage rule Δ ∊ in 8 0.30 3.3...
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
...), approximately 100×. See caption for Fig. 4.19 for identification of fracture morphologies. Fig. 4.28. Creep-rupture/low-cycle-fatigue damage interaction curve for 1Cr-Mo-V rotor steel at 540 °C (1000 °F) (after Ref 82 ). Fig. 4.29. Linear damage fatigue-creep design envelopes ( Ref 78...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060173
EISBN: 978-1-62708-343-0
...) Omits effect of compressive period Summary of creep-fatigue life prediction models Table A8.1 Summary of creep-fatigue life prediction models Type Acronym Title Ref A: Life or damage fraction rules A LCR Linear Creep-Rupture Damage Rule 8.34 A LCF Linear creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... to 24 h and at different strain rates. It was concluded that the strain-range-partitioning method resulted in a better life-prediction capability than the linear damage-summation rule. The results of Ostergren, showing the absence of significant frequency and hold-time effects, have already been...
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 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... Standard E 1150 reads as follows: “The process of progressive localized permanent structural damage occurring in a material subjected to conditions that produce fluctuating stresses and strains at some point or points and that may culminate in cracks or complete fracture after a sufficient number...
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...
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
... of Cumulative Fatigue Damage Analysis for Cold End Rotating Structures, preprint 79-1190 , AIAA/SAE/ASME 15th Joint Propulsion Conference , (Las Vegas, NV) , June 18 – 20 , 1979 4.16 Manson S.S. and Halford G.R. , Correction to: Practical Implementation of the Double Linear Damage Rule...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780276
EISBN: 978-1-62708-281-5
... is not always correct, especially when hard phases and ceramic fillers are involved. IROM cannot be applied in such a case, because of nonlinearity in wear load relation. Hence, another model, known as the linear rule of mixtures (LROM) (Eq 2), was developed ( Ref 15 ) and is suitable for composites containing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
...-expansion loads within the assembly. The information needed is obtained from plant records, design drawings, sacrificial sample examinations, and over-all inspection of the boiler. It is assumed that a theoretical estimation of damage can be obtained by linear additon of three components, as follows...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.9781627083409
EISBN: 978-1-62708-340-9
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490059
EISBN: 978-1-62708-340-9
... 6 - 13 49. Voorhees H.R. and Freeman F.W. , “ Notch Sensitivity of Aircraft Structural and Engine Alloys, ” Wright Air Development Center Technical Report, Part II , Jan 1959 , p 23 50. Abo M.M. El Ata and I. Finnie, “ A Study of Creep Damage Rules, ” ASME Paper...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060001
EISBN: 978-1-62708-355-3
.... For grips, of which many types are in common use in tensile testing, only two rules apply: the grips must properly fit the specimens (or vice versa), and they must have sufficient force capacity so that they are not damaged during testing. As described earlier in the section “Tensile Specimens...
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
... exhausted. That is, at points A and C , 100% of the life is available, while at points B and D , the respective lives are completely exhausted. If fatigue damage accumulates in a linear manner, each cycle contributes the same amount of damage at a given stress level. For example, at σ 1 , on cycling...