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interaction damage rule

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
... such damage rules and discusses their applicability in different situations. creep-fatigue test fatigue life hysteresis loops interaction damage rule life fraction rule microstructural damage strain-range partitioning STRAIN-RANGE PARTITIONING (SRP) is a unique and powerful method...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060069
EISBN: 978-1-62708-343-0
... derives closed-form equations that account for interactions among any number of adjacent loops and can be used, through successive application, to analyze any loading history. creep strain healing effects interaction damage rule strain-range partitioning FOR MORE THAN A DECADE, we attempted...
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 hence are not considered damaging from the standpoint of creep fatigue, although geometric instabilities may result, leading to localized buckling-type failures. Step 7: Interaction Damage Rule For each set of calculations from step 5 , determine the corresponding lives from the life...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060111
EISBN: 978-1-62708-343-0
... strain is Δε PP , so that Δε PP = 0.0160. The life is then calculated by the Interaction Damage Rule: F P P = 0.0160 0.016975 = 0.943 ⁢               F C P = 0.000975 0.016975 = 0.057 From Fig 6.1(a) : N P P = 233...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060173
EISBN: 978-1-62708-343-0
... of strain. However, only three types of components can coexist, since Δε PC and Δε CP are mutually exclusive. Excess creep (or plasticity) can occur either in tension or in compression but not both. When more than one component is present, an Interaction Damage Rule has been postulated ( Ref 8.16 ) (see...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060083
EISBN: 978-1-62708-343-0
... each test. An example of the significant creep acceleration is shown in Fig. 5.14 for the normalized and tempered 2¼Cr-1Mo steel. The CP damage, was assessed on each cycle as the tests progressed. Life predictions were made using Eq 5.5 , 5.7 , and the Interaction Damage Rule. How well...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060231
EISBN: 978-1-62708-343-0
... that oversight. In particular, a nonlinear, cumulative fatigue damage interaction analysis (low-cycle/high-cycle fatigue, or LCF/HCF) is presented that indicates proofing damage can significantly compromise required HCF resistance. In this analysis, localized plasticity caused by OPPT is viewed as a half-cycle...
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
... to the above apply for many other heavy-section components such as petroleum- and chemical-industry pressure vessels and nuclear-reactor pressure vessels. In view of the importance of combined creep and fatigue damage with respect to component reliability, many attempts have been made to develop damage rules...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
... modify the fatigue behavior substantially, as will be discussed in later sections. Creep-Fatigue Interaction Pure low-cycle fatigue under continuous cycling as described earlier is the exception rather than the rule, because during operation machine components are frequently held at high...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780276
EISBN: 978-1-62708-281-5
... the possibility of mutual interaction of the constituents causing a deviation in the wear resistance of a hybrid composite based on the rule of mixture calculation. The practical application of such composite was justified on the basis of performance-to-cost ratio. Fig. 20 Specific wear rate as a function...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420239
EISBN: 978-1-62708-310-2
..., if made by melting, or that cannot be melted to a homogeneous liquid can sometimes be produced by powder metallurgy techniques. Contamination from the atmosphere is often very damaging. In extreme cases, the liquidus temperature has been observed to be depressed several hundred degrees simply...
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...
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
... Rules The most common approach to calculation of cumulative creep damage is to compute the amount of life expended by using time or strain fractions as measures of damage. When the fractional damages add up to unity, then failure is postulated to occur. The most prominent rules are as follows...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
... cyclic loading can lead to delamination, the primary failure mode of most composites, and describes some of the methods that have been developed to improve delamination resistance, assess damage tolerance, determine residual strength, and predict failure modes. composite laminate damage tolerance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860163
EISBN: 978-1-62708-348-5
...-diameter copper wire to one of large diameter, will tax the skill and patience of the most accomplished welder. The major problem with spot welding leads is the possibility of major damage to the specimen by mechanical deformation or arc burn. Welding, usually used for joining fine wires, is a reliable...
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 June 2008
DOI: 10.31399/asm.tb.emea.t52240265
EISBN: 978-1-62708-251-8
... of the simplest is the damage-accumulation approach. This approach is essentially an extension of the Palmgren-Miner rule for predicting cumulative fatigue damage. In other words, the independent damage from fatigue and creep are summed and compared to the limit of damage the material can withstand: (Eq 15.5...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870449
EISBN: 978-1-62708-314-0
... in Fig. 17.2 . Potential causes include: Bearing : Bearing failures are characterized by localized damage, such as delaminations and matrix crazing around the hole. Localized compression loading caused by the fastener leads to buckling and kinking of the fibers followed by crushing of the matrix...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
... to separate. Mixing is in high-shear mixers operating at relatively low rotation speeds to minimize damage to the ingredients. Many devices achieve this goal, ranging from small-batch sigma blade mixers (1 kg, or 2 lb, per day) to double-planetary mixers (10 to 100 kg, or 22 to 220 lb, per day) to large...