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New unified fracture toughness estimation scheme for structural integrity assessment

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Abstract

At present, treatment of fracture toughness data varies depending on the type of data (K{sub IC}, J, CTOD) that are available for fracture mechanics analysis. This complicates structural integrity assessment and makes it difficult to apply any single, unified procedure. Within the Brite-Euram project `SINTAP` a fracture toughness estimation scheme has been developed for the unified treatment of data for use in structural integrity assessment. As a procedure, it can be applied to Charpy data, as well as to fracture toughness data, and is suitable for the treatment of data at both single and different temperatures. The data sets may contain results from both homogeneous and inhomogeneous material, making the procedure applicable also to welded joints. The procedure allows fracture toughness assessment with quantified probability and confidence levels. Irrespective of the type of the original data, one material-specific K{sub mat} value representing a conservative estimate of the mean fracture toughness is obtained (with its probability distribution). This information can then be applied to structural integrity assessment. (orig.) 4 refs.
Authors:
Wallin, K; Nevasmaa, P; [1]  Bannister, A [2] 
  1. VTT, Espoo (Finland)
  2. Research and Development, British Steel plc., Swinden Technology Centre Rotherham (United Kingdom)
Publication Date:
Dec 31, 1998
Product Type:
Conference
Report Number:
VTT-SYMP-185(v.2); CONF-980999-
Reference Number:
SCA: 360103; 200104; PA: FI-99:003081; EDB-99:036260; SN: 99002064695
Resource Relation:
Conference: 4. Baltica seminar on plant maintenance for managing life and performance, Helsinki (Finland), 7-9 Sep 1998; Other Information: PBD: 1998; Related Information: Is Part Of BALTICA IV. Plant maintenance for managing life and performance; Hietanen, S.; Auerkari, P. [eds.] [VTT Manufacturing Technology, Espoo (Finland). Operational Reliability]; PB: 398 p.
Subject:
36 MATERIALS SCIENCE; 20 FOSSIL-FUELED POWER PLANTS; COMPARATIVE EVALUATIONS; CRACK PROPAGATION; FRACTURE MECHANICS; POWER PLANTS; CHARPY TEST; TEMPERATURE DEPENDENCE; BRITTLE-DUCTILE TRANSITIONS; FRACTURE PROPERTIES; FERRITIC STEELS
OSTI ID:
324997
Research Organizations:
Technical Research Centre of Finland, Espoo (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE99730863; ISBN 951-38-4577-X; TRN: FI9903081
Availability:
OSTI as DE99730863
Submitting Site:
FI
Size:
pp. 543-554
Announcement Date:
Apr 05, 1999

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Citation Formats

Wallin, K, Nevasmaa, P, and Bannister, A. New unified fracture toughness estimation scheme for structural integrity assessment. Finland: N. p., 1998. Web.
Wallin, K, Nevasmaa, P, & Bannister, A. New unified fracture toughness estimation scheme for structural integrity assessment. Finland.
Wallin, K, Nevasmaa, P, and Bannister, A. 1998. "New unified fracture toughness estimation scheme for structural integrity assessment." Finland.
@misc{etde_324997,
title = {New unified fracture toughness estimation scheme for structural integrity assessment}
 author = {Wallin, K, Nevasmaa, P, and Bannister, A}
 abstractNote = {At present, treatment of fracture toughness data varies depending on the type of data (K{sub IC}, J, CTOD) that are available for fracture mechanics analysis. This complicates structural integrity assessment and makes it difficult to apply any single, unified procedure. Within the Brite-Euram project `SINTAP` a fracture toughness estimation scheme has been developed for the unified treatment of data for use in structural integrity assessment. As a procedure, it can be applied to Charpy data, as well as to fracture toughness data, and is suitable for the treatment of data at both single and different temperatures. The data sets may contain results from both homogeneous and inhomogeneous material, making the procedure applicable also to welded joints. The procedure allows fracture toughness assessment with quantified probability and confidence levels. Irrespective of the type of the original data, one material-specific K{sub mat} value representing a conservative estimate of the mean fracture toughness is obtained (with its probability distribution). This information can then be applied to structural integrity assessment. (orig.) 4 refs.}
 place = {Finland}
 year = {1998}
 month = {Dec}
 }