Crack growth evaluation of a multimaterial CS-type specimen

Arja Saarenheimo, Heli Talja, Horst Kordisch, B. Voss, Günther Neubrech (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

During the German HDR Safety Program the integrity of a reactor pressure vessel was studied intensively during a pressurized thermal shock loading. As a part of the work this paper presents a stable crack growth evaluation for a side-grooved, multimaterial CS-type specimen, which was detached from the inner surface of the HDR reactor pressure vessel. The specimen was composed of ferritic base material and two austenitic cladding material layers. The specimen was tested at the Fraunhofer-Institut für Werkstoffmechanik, Freiburg, Germany, and revealed an extremely nonuniform stable crack growth distribution along the crack front.

Elastic-plastic finite element analyses were carried out using the 85-version of the ADINA code. For crack growth simulation a separate subroutine package IWM-CRACK linked with ADINA was used. Additional J-integral calculations were carried out based on the ADINA results, using the VTTVIRT code in order to study the path dependence of the J-integral.

The crack growth was controlled by Jr curves, while actual measured data were available only for the base material, and hypothetical Jr curves were applied for the two cladding layers. The calculated maximum load was slightly higher than the maximum load measured in the test.

The crack growth was relatively well simulated in quality. The slight numerical discrepancies at some locations along the crack front were consistent with extreme local material brittleness, which was clearly underestimated by the assumed material properties.
Original languageEnglish
Pages (from-to)135-146
JournalInternational Journal of Pressure Vessels and Piping
Volume62
Issue number2
DOIs
Publication statusPublished - 1995
MoE publication typeA1 Journal article-refereed

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Crack propagation
Pressure vessels
Cracks
Subroutines
Thermal shock
Brittleness
Materials properties
Plastics

Cite this

Saarenheimo, Arja ; Talja, Heli ; Kordisch, Horst ; Voss, B. ; Neubrech, Günther. / Crack growth evaluation of a multimaterial CS-type specimen. In: International Journal of Pressure Vessels and Piping. 1995 ; Vol. 62, No. 2. pp. 135-146.
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author = "Arja Saarenheimo and Heli Talja and Horst Kordisch and B. Voss and G{\"u}nther Neubrech",
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Crack growth evaluation of a multimaterial CS-type specimen. / Saarenheimo, Arja; Talja, Heli; Kordisch, Horst; Voss, B.; Neubrech, Günther (Corresponding Author).

In: International Journal of Pressure Vessels and Piping, Vol. 62, No. 2, 1995, p. 135-146.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Kordisch, Horst

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