Failure behavior of a pipe system with a circumferentially oriented flaw: Analytical and experimental investigations

Timo Mikkola, Harald Diem, Dieter Blind, Herman Hunger

Research output: Contribution to journalArticleScientific

2 Citations (Scopus)

Abstract

At the german HDR-test-facility a pipe failure experiment was performed at a fullsize feedwater piping system under operating conditions of and with an elevated oxygen content in the pressure medium. The loading was internal pressure and a cyclic varying bending moment with an of 0.5. The in form of a circumferentially orientated notch initially weakened piping system failed after a total number of 4773 loaded cycles with different frequencies in form of a small leak.

The analyses of the fracture surface indicated the strongly growing influence of corrosion effects on the crack propagation rate with decreasing loading frequency.

The cyclic crack growth and the leak-before-break behavior of the piping system could be explained on the basis of results of finite element calculations using ADINA-code.
Original languageEnglish
Pages (from-to)197-210
JournalNuclear Engineering and Design
Volume112
DOIs
Publication statusPublished - 1989
MoE publication typeB1 Article in a scientific magazine

Fingerprint

Piping systems
piping
pipe
Pipe
bending moments
Defects
internal pressure
Crack propagation
defects
test facilities
crack propagation
notches
corrosion
cracks
Bending moments
Test facilities
cycles
crack
oxygen
Corrosion

Cite this

Mikkola, Timo ; Diem, Harald ; Blind, Dieter ; Hunger, Herman. / Failure behavior of a pipe system with a circumferentially oriented flaw : Analytical and experimental investigations. In: Nuclear Engineering and Design. 1989 ; Vol. 112. pp. 197-210.
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Failure behavior of a pipe system with a circumferentially oriented flaw : Analytical and experimental investigations. / Mikkola, Timo; Diem, Harald; Blind, Dieter; Hunger, Herman.

In: Nuclear Engineering and Design, Vol. 112, 1989, p. 197-210.

Research output: Contribution to journalArticleScientific

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T1 - Failure behavior of a pipe system with a circumferentially oriented flaw

T2 - Analytical and experimental investigations

AU - Mikkola, Timo

AU - Diem, Harald

AU - Blind, Dieter

AU - Hunger, Herman

PY - 1989

Y1 - 1989

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AB - At the german HDR-test-facility a pipe failure experiment was performed at a fullsize feedwater piping system under operating conditions of and with an elevated oxygen content in the pressure medium. The loading was internal pressure and a cyclic varying bending moment with an of 0.5. The in form of a circumferentially orientated notch initially weakened piping system failed after a total number of 4773 loaded cycles with different frequencies in form of a small leak.The analyses of the fracture surface indicated the strongly growing influence of corrosion effects on the crack propagation rate with decreasing loading frequency.The cyclic crack growth and the leak-before-break behavior of the piping system could be explained on the basis of results of finite element calculations using ADINA-code.

U2 - 10.1016/0029-5493(89)90157-X

DO - 10.1016/0029-5493(89)90157-X

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EP - 210

JO - Nuclear Engineering and Design

JF - Nuclear Engineering and Design

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