Journal Published Online: 05 January 2004
Volume 1, Issue 1

Constraint Correction of Fracture Toughness CTOD for Fracture Performance Evaluation of Structural Components

CODEN: JAIOAD

Abstract

A correction of CTOD for constraint loss in large-scale yielding conditions is made on the basis of the Weibull stress fracture criterion that eliminates an excessive conservatism in the conventional fracture assessment and material fracture toughness requirement. A CTOD ratio β = δ3P / δWP (<1) is proposed, where δWP is the CTOD of a wide plate component and δ3P is an equivalent CTOD of the fracture toughness specimen at which the toughness specimen gives a compatible Weibull stress with the wide plate. The CTOD ratio β is decreased to a large extent after full yielding of the wide plate component, which is more significant for a high yield ratio YR and a deep surface crack in the wide plate. The Weibull modulus m exerts a marginal influence on β. A case study is presented on the application of the CTOD ratio β to the fracture performance assessment of full-scale column-to-beam connections subjected to cyclic and dynamic loading.

Author Information

Minami, F
Graduate School of Engineering, Osaka University, Suita, Osaka, Japan
Arimochi, K
Plate & Structural Steel Project Promoting Department, Sumitomo Metal Industries, LTD., Hyogo, Japan
Pages: 19
Price: $25.00
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Details
Stock #: JAI10615
ISSN: 1546-962X
DOI: 10.1520/JAI10615