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Fracture Control for Arctic Vessels and Structures

by M. Tomin, Det norske Veritas (Canada) Ltd, Canada,
M. M. Zadeh, Det norske Veritas (Canada) Ltd, Canada,
A. Cormeau, Det norske Veritas (Canada) Ltd, Canada,
M. Nessim, Det norske Veritas (Canada) Ltd, Canada,



Document Type: Proceeding Paper

Part of: Probabilistic Methods in Civil Engineering

Abstract:

Materials used for construction of Arctic structures and vessels are exposed to low ambient temperatures, high local ice loads and intermediate to high loading rates. All these factors can significantly affect the risk of unstable fracture in these structures. Recognizing the probabilistic character of both fatigue crack propagation and unstable fracture makes probabilistic modeling a valuable tool for the 'design of materials' for the Arctic. In the present study a probabilistic software PROBAN, developed jointly by DnV and the Technical University of Munich, was used to model the probability of failure of selected structural details and for the following failure modes: unstable failure, and plastic collapse. Both events are functions of time depending on the fatigue crack propagation.

Subject Headings: Cracking | Probability | Failure modes | Structural failures | Material failures | Ice loads | Steel structures | Arctic

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