0
Research Papers: Materials and Fabrication

Remaining Fatigue Lives of Similar Surface Flaws in Accordance With Combination Rules

[+] Author and Article Information
Kai Lu

Japan Atomic Energy Agency,
2-4 Shirakata, Tokai-mura,
Naka-gun,
Ibaraki 319-1195, Japan
e-mail: lu.kai@jaea.go.jp

Yinsheng Li

Japan Atomic Energy Agency,
2-4 Shirakata, Tokai-mura,
Naka-gun,
Ibaraki 319-1195, Japan
e-mail: li.yinsheng@jaea.go.jp

Kunio Hasegawa

Center of Advanced Innovation Technologies,
VSB-Technical University of Ostrava,
17. Listopadu 15/2172,
Poruba, Ostrava 708 33, Czech Republic
e-mail: kunioh@kzh.biglobe.ne.jp

Valery Lacroix

Tractebel Engineering,
Avenue Ariane 7,
Brussels 1200, Belgium
e-mail: valery.lacroix@tractebel.engie.com

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received May 26, 2016; final manuscript received November 4, 2016; published online January 11, 2017. Assoc. Editor: David L. Rudland.

J. Pressure Vessel Technol 139(2), 021407 (Jan 11, 2017) (6 pages) Paper No: PVT-16-1086; doi: 10.1115/1.4035317 History: Received May 26, 2016; Revised November 04, 2016

When multiple flaws are detected in structural components, the remaining lives of the components are estimated by fatigue flaw growth calculations using combination rules in fitness-for-service (FFS) codes. Many FFS codes provide combination rules for multiple flaws; however, these rules differ significantly among the various codes. Fatigue flaw growths for two similar adjacent surface flaws in a flat plate subjected to a cyclic tensile stress were obtained by numerical calculations using these different combination rules. In addition, fatigue flaw growths taking into account the interaction effect between the two similar flaws were conducted by the extended finite-element method (X-FEM). The calculation results show that the fatigue lives calculated by the X-FEM are close to those obtained by the American Society of Mechanical Engineers (ASME) Code. Finally, it is noted that the combination rule provided by the ASME Code is appropriate for fatigue flaw growth calculations.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Two surface flaws characterized in accordance with the ASME Code [7]

Grahic Jump Location
Fig. 2

Two semi-elliptical surface flaws with a similar size

Grahic Jump Location
Fig. 3

X-FEM model used for fatigue flaw growth calculations and location of flaws at the midheight cross section

Grahic Jump Location
Fig. 4

Cross section in the plane of the adjacent surface flaws (example for a1/ ℓ1  = a2/ ℓ2  = 0.15, and S0 = 1 mm)

Grahic Jump Location
Fig. 5

Fatigue flaw growths in accordance with code procedures: (a) ASME Code and (b) Other FFS codes

Grahic Jump Location
Fig. 6

Fatigue flaw growth for adjacent two flaws using X-FEM

Grahic Jump Location
Fig. 7

Fatigue flaw growth results for the case of a/ℓ = 0.05 and S0 = 0.5 mm

Grahic Jump Location
Fig. 8

Fatigue flaw growth results for the case of a/ℓ = 0.05 and S0 = 1.0 mm

Grahic Jump Location
Fig. 9

Fatigue flaw growth results for the case of a/ℓ = 0.15 and S0 = 0.5 mm

Grahic Jump Location
Fig. 10

Fatigue flaw growth results for the case of a/ℓ = 0.15 and S0 = 1.0 mm

Grahic Jump Location
Fig. 11

Fatigue flaw growth results for the case of a/ℓ = 0.5 and S0 = 0.5 mm

Grahic Jump Location
Fig. 12

Fatigue flaw growth results for the case of a/ℓ = 0.5 and S0 = 1.0 mm

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In