Development of ice failure and yield criteria for accidental limit state design

Ships and offshore structures operating in Arctic waters are typically designed for ultimate limit states based on ice actions with annual frequencies of occurrence in the range of 10-2. However, it is also often required to assess structural resistance to more rare ice actions (with an annual probability of 10-4) such as iceberg collisions and impacts. In these cases, the structure may undergo severe deformation while maintaining the necessary global stability and cargo containment. These structures are designed using the Accidental Limit State (ALS) method, which requires integrated nonlinear finite element analysis of both the impacting ice object and the structure itself. An implementation of such analysis calls for advanced continuum mechanical models of the ice material (including ice fracture). This paper reviews the state-of-the-art in ice material models that can be used for iceberg impact simulations. Emphasis is placed on the manageability of the model, the need for calibration and the uncertainties associated with fitting failure criteria to laboratory strength tests. The paper highlights the problem of ice data interpretation and describes how the current understanding of ice fracture facilitates a realistic ALS approach for ships and offshore structures.

• Record URL:
  • http://www.poac.com/Papers/POAC11_1-79.zip
• Record URL:
  • http://www.poac.com/PapersOnline.html
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03766756
• Supplemental Notes:
  • Abstract reprinted with permission of the International Conference on Port and Ocean Engineering Under Arctic Conditions (POAC).
• Corporate Authors:

  Port and Ocean Engineering under Arctic Conditions (POAC)

  ,    
• Authors:
  • Kim, Ekaterina
  • Amdahl, Jørgen
  • Løset, Sveinung
• Conference:
  • 21st International Conference on Port and Ocean Engineering under Arctic Conditions (POAC'11)
  • Location: Montréal , Canada
  • Date: 2011-7-10 to 2011-7-14
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 12p
• Monograph Title: POAC '11: Proceedings of the 21st International Conference on Port and Ocean Engineering under Arctic Conditions
• Serial:
  • Proceedings of the International Conference on Port and Ocean Engineering Under Arctic Conditions
  • Publisher: Port and Ocean Engineering under Arctic Conditions (POAC)
  • ISSN: 0376-6756
  • EISSN: 2077-7841
  • Serial URL: http://www.poac.com/PapersOnline.html

Subject/Index Terms

• TRT Terms: Finite element method; Fracture mechanics; Icebergs; Offshore structures; Structural design; Ultimate load design; Vehicle design; Water transportation crashes
• Subject Areas: Bridges and other structures; Design; Marine Transportation; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01544963
• Record Type: Publication
• Report/Paper Numbers: POAC11-023
• Files: TRIS
• Created Date: Nov 24 2014 3:51PM