Re-evaluation of thermal shock experiment results based on the VTT approach for statistical treatment of fracture toughness data

Kim Wallin

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

One important step in fracture mechanical research has been thermal shock experiments (TSE). The TSEs are exceptional because many of them had extremely long crack fronts. As a trend, the TSE initiation fracture toughness results form a lower bound to the small specimen data used for material characterization. Presently, work is under way to produce an ASTM testing standard for fracture toughness testing in the transition region. The standard is based on the VTT approach for statistical treatment of fracture toughness data. Key components in the VTT approach are statistical expressions for describing the data scatter and for predicting a specimens size effect, and an expression for the fracture toughness temperature dependence. In order to examine the validity of the statistical size effect assumption, the TSEs were reevaluated with the VTT approach. For all the TSEs investigated, the application of the statistical size correction has had the effect of bringing the material characterization data in agreement with the actual TSE results. Furthermore, the application of a statistically defined size-corrected lower bound toughness estimate, based on the small specimen material characterization data and the master curve, yield a conservative, but realistic, estimate of the TSE failure behaviour.

Original languageEnglish
Pages (from-to)205 - 218
Number of pages14
JournalNuclear Engineering and Design
Volume174
Issue number3
DOIs
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

Fingerprint

fracture toughness
thermal shock
Thermal shock
fracture strength
Fracture toughness
evaluation
size effect
experiment
Experiments
Testing
toughness
estimates
Toughness
cracks
Cracks
trends
crack
temperature dependence
curves
material

Cite this

@article{31af2a5d3f3b4b5eb4574df7cb3195b8,
title = "Re-evaluation of thermal shock experiment results based on the VTT approach for statistical treatment of fracture toughness data",
abstract = "One important step in fracture mechanical research has been thermal shock experiments (TSE). The TSEs are exceptional because many of them had extremely long crack fronts. As a trend, the TSE initiation fracture toughness results form a lower bound to the small specimen data used for material characterization. Presently, work is under way to produce an ASTM testing standard for fracture toughness testing in the transition region. The standard is based on the VTT approach for statistical treatment of fracture toughness data. Key components in the VTT approach are statistical expressions for describing the data scatter and for predicting a specimens size effect, and an expression for the fracture toughness temperature dependence. In order to examine the validity of the statistical size effect assumption, the TSEs were reevaluated with the VTT approach. For all the TSEs investigated, the application of the statistical size correction has had the effect of bringing the material characterization data in agreement with the actual TSE results. Furthermore, the application of a statistically defined size-corrected lower bound toughness estimate, based on the small specimen material characterization data and the master curve, yield a conservative, but realistic, estimate of the TSE failure behaviour.",
author = "Kim Wallin",
year = "1997",
doi = "10.1016/S0029-5493(97)00133-7",
language = "English",
volume = "174",
pages = "205 -- 218",
journal = "Nuclear Engineering and Design",
issn = "0029-5493",
publisher = "Elsevier",
number = "3",

}

Re-evaluation of thermal shock experiment results based on the VTT approach for statistical treatment of fracture toughness data. / Wallin, Kim.

In: Nuclear Engineering and Design, Vol. 174, No. 3, 1997, p. 205 - 218.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Re-evaluation of thermal shock experiment results based on the VTT approach for statistical treatment of fracture toughness data

AU - Wallin, Kim

PY - 1997

Y1 - 1997

N2 - One important step in fracture mechanical research has been thermal shock experiments (TSE). The TSEs are exceptional because many of them had extremely long crack fronts. As a trend, the TSE initiation fracture toughness results form a lower bound to the small specimen data used for material characterization. Presently, work is under way to produce an ASTM testing standard for fracture toughness testing in the transition region. The standard is based on the VTT approach for statistical treatment of fracture toughness data. Key components in the VTT approach are statistical expressions for describing the data scatter and for predicting a specimens size effect, and an expression for the fracture toughness temperature dependence. In order to examine the validity of the statistical size effect assumption, the TSEs were reevaluated with the VTT approach. For all the TSEs investigated, the application of the statistical size correction has had the effect of bringing the material characterization data in agreement with the actual TSE results. Furthermore, the application of a statistically defined size-corrected lower bound toughness estimate, based on the small specimen material characterization data and the master curve, yield a conservative, but realistic, estimate of the TSE failure behaviour.

AB - One important step in fracture mechanical research has been thermal shock experiments (TSE). The TSEs are exceptional because many of them had extremely long crack fronts. As a trend, the TSE initiation fracture toughness results form a lower bound to the small specimen data used for material characterization. Presently, work is under way to produce an ASTM testing standard for fracture toughness testing in the transition region. The standard is based on the VTT approach for statistical treatment of fracture toughness data. Key components in the VTT approach are statistical expressions for describing the data scatter and for predicting a specimens size effect, and an expression for the fracture toughness temperature dependence. In order to examine the validity of the statistical size effect assumption, the TSEs were reevaluated with the VTT approach. For all the TSEs investigated, the application of the statistical size correction has had the effect of bringing the material characterization data in agreement with the actual TSE results. Furthermore, the application of a statistically defined size-corrected lower bound toughness estimate, based on the small specimen material characterization data and the master curve, yield a conservative, but realistic, estimate of the TSE failure behaviour.

U2 - 10.1016/S0029-5493(97)00133-7

DO - 10.1016/S0029-5493(97)00133-7

M3 - Article

VL - 174

SP - 205

EP - 218

JO - Nuclear Engineering and Design

JF - Nuclear Engineering and Design

SN - 0029-5493

IS - 3

ER -