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fatigue scatter

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Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002370
EISBN: 978-1-62708-193-1
... on the determination of probabilities for detected fracture positions within the observed range of fatigue scatter. It schematically illustrates a constant-amplitude stress cycling about a possible mean load that leads to the fracture of a single part or specimen. The article discusses the evaluation of the range...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001038
EISBN: 978-1-62708-161-0
... cycles; standard deviation, 37,000 cycles; coefficient of variations, 0.28. Fig. 26 Scatter of fatigue limit data. Based on the survival after 10 million cycles of approximately 1000 specimens, at one heat, of AISI-SAE 4340 steel with tensile strengths of 995, 1320, and 1840 MPa (144, 191...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0009219
EISBN: 978-1-62708-176-4
... is discussed. The techniques for defining a mean fatigue curve and evaluating scatter or variability about that mean are explained. The article presents the standard techniques for statistical characterization of the fatigue strength or fatigue limit of a single material by use of the Probit method, the up...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003382
EISBN: 978-1-62708-195-5
... for durability and damage tolerance, the primary concerns are out-of-plane failures, such as delamination, material degradation associated with environment, stability under compression loading, large degree of scatter in fatigue life, and bearing failure of joints. This article presents an introductory...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003439
EISBN: 978-1-62708-195-5
... of the building-block approach can be used to establish environmental compensation values to be applied to the loads of higher-level room-temperature tests. Similarly, other lower-level building- block tests determine truncation approaches for fatigue spectra and compensation for fatigue scatter at the full-scale...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002367
EISBN: 978-1-62708-193-1
... of safety given the scatter in the fatigue data for the detail. Fig. 6 Frequency vs. the log of the standard deviation in fatigue strength in ksi Fig. 7 Frequency vs. the log of the standard deviation in fatigue strength in ksi Fig. 8 Typical data for AISC category C weld...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002382
EISBN: 978-1-62708-193-1
... for front free surface Fig. 3 Scatter due to inhomogeneities and measurement of fatigue crack growth. (a) Data. (b) Rates of crack growth. (c) Scatterband. (d) Re-prediction of crack growth curves versus cycles (N) Fig. 2 Typical true scatter in fatigue crack growth. (a) Crack growth...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002358
EISBN: 978-1-62708-193-1
... mechanics Fig. 5 Typical fatigue crack growth data for mechanically small cracks and large cracks. Source: Ref 13 Fig. 6 Typical fatigue crack growth data for short cracks at notches. Source: Ref 14 Fig. 4 Schematic of relationship between mechanically small cracks...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002373
EISBN: 978-1-62708-193-1
... further improve the contact fatigue resistance of these systems. One important problem in the application of rolling contact systems is the wide scatter in failure lives. Zaretsky ( Ref 15 ) indicates that in a group of 30 ball bearings the ratio of the longest to the shortest life may be as much as 20...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006461
EISBN: 978-1-62708-190-0
... Cracks in Steel Using Scattering of Rayleigh Waves , NDTE Int. , Vol 34 , 2001 , p 483 – 492 10.1016/S0963-8695(00)00080-3 57. Rokhlin S.I. and Kim J.-Y. , Surface Acoustic Wave Characterization of Pitting Corrosion Damage with Fatigue Cracks , Nondestructive Materials...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002376
EISBN: 978-1-62708-193-1
... with other factors to be discussed, meant that the matrix was very sensitive to loading and other external conditions that could lead to incipient material cracking and thus to contact fatigue. In the early tests, large scatter in fatigue life was experienced. This persists and indicates that close...
Book Chapter

By Mark Hayes
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002377
EISBN: 978-1-62708-193-1
... in the process of initiating have started to propagate. The variability and importance of initiation for the first small crack results in scatter, which is why spring fatigue data are treated in a statistical manner. In addition, failure of a metallic spring by a fatigue mechanism is almost always sudden...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000612
EISBN: 978-1-62708-181-8
...-overload fracture, low-cycle and high-cycle fatigue fracture, fracture surface, brittle intergranular fracture, hydrogen embrittlement, and intergranular stress-corrosion cracking of stainless steel components of these steels. The components include high-pressure compressor parts, springs, deflector yokes...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006443
EISBN: 978-1-62708-190-0
..., contains defects that represent the worst case for both flaw detection and crack growth (generally a surface fatigue crack). Fatigue cracks have the advantages that they can be grown in the laboratory and, when produced under well-controlled conditions, have predictable geometries. The qualification...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001763
EISBN: 978-1-62708-178-8
...Abstract Abstract This article presents the experimental and theoretical aspects of small-angle scattering, and discusses specific applications used in the characterization of metals, glasses, polymers, and ceramics. The basic methods of collimating x-rays, the cause of smearing from a line...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0009217
EISBN: 978-1-62708-176-4
...Abstract Abstract Fatigue crack growth rate testing and data analysis are performed to characterize the crack propagation resistance of material environment combinations in order to predict crack growth life under anticipated stress histories. This article presents analyses performed...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005405
EISBN: 978-1-62708-196-2
... difficult to detect under service conditions. Accordingly, initiation-based modeling approaches are used that account for size effects and scatter in fatigue to estimate minimum life. On the other hand, this approach is often too conservative in practice, and it is sometimes desired to “retire for cause...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002393
EISBN: 978-1-62708-193-1
... in. corner cracks at fastener holes (as indicated by Fig. 44 of Ref 9 ). Other manufacturers based the threshold on fatigue analysis methods using an appropriate scatter factor. However, the latter approach does not account for possible initial manufacturing damage, and for some structural configurations...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003313
EISBN: 978-1-62708-176-4
... test data for axial loading of polished specimens of AISI 4340 steel (ultimate tensile strength, UTS, 860 to 1240 MPa, or 125 to 180 ksi) and is applicable to other steels (e.g., AISI 2330, 4130, 8630). Source: Ref 6 Fig. 1 Laboratory simulation of the multistage fatigue process. Source...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006462
EISBN: 978-1-62708-190-0
.... This distribution provides a basis for scaling the demonstrated test life to a life of assured high reliability, according to this so-called scatter factor. The scatter distribution may be derived from past experience with similar aircraft, or from the results of development tests preceding the full-scale fatigue...