Community Research and Development Information Service - CORDIS


In weld structures, fracture initiation is usually prevented by ensuring that the fracture toughness in the weld and heat affected zone is sufficiently high for the stress levels experienced. In some cases, initiation cannot be excluded in absolute sense and a second line of defence is required to ensure that a crack, once initiated, will not propagate to such an extent that complete structural failure occurs. Crack arrest is therefore an important property in large structures such as ships storage vessels, high-pressure gas pipelines and offshore structures.

An energy balance approach has been investigated for predicting crack arrest conditions that offers greater accuracy for predicting the length of the arrested crack and the crack arrest temperature and is relatively simple in comparison with existing methodologies. Other crack arrest assessment methods, including empirical correlations, have been investigated during this project.

This report presents the development and validation of the energy balance approach together with other assessment methods for crack arrest. Comparisons of the available methodologies have been performed and initial guidelines and discussion regarding the application of such approaches to structures have been given.

Additional information

Authors: SLATER S, CORUS UK Limited, Rotherham (UK);PRIEST A H, CORUS UK Limited, Rotherham (UK);ALVARES J A, University of Cantabria, Santander (ES);GALLO C, University of Cantabria, Santander (ES);POLANCO J A, University of Cantabria, Santander (ES);SAIZ A, University of Cantabria, Santander (ES);GUTIERREZ-SOLANA F, University of Cantabria, Santander (ES);PONSOT A, Creusot Loire Industrie, Le Creusot (FR);WALLIN K, VTT Manufacturing Technology, Espoo (FI);LAUKKANEN A, VTT Manufacturing Technology, Espoo (FI);DEMOFONTI G, CSM, Rome (IT);DI BIAGGIO M, CSM, Rome (IT);MECOZZI E, CSM, Rome (IT)
Bibliographic Reference: EUR 20952 EN (2004), 171 pp. Euro: 25
Availability: EUR-OP reference: KI-NA-20952-EN-S Available from EUR-OP sales agents URL:
ISBN: ISBN: 92-894-7881-0
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