Materials selection for XL wind turbine support structures: a corrosion-fatigue perspective

Victor Igwemezie, Ali Mehmanparast, Athanasios Kolios

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The continued growth of the offshore wind industry will depend essentially on reductions in wind energy production cost. Large cost reductions can be achieved through efficient, economic and optimised wind turbine support structures. To achieve maximum offshore wind adoption beyond 2020, significant industrial and research efforts are being made in optimised material selection and application. Fatigue and corrosion damage are the greatest challenges today in design and life estimation of wind turbine support structures. S355 steel is currently used in fabrication of most wind turbine monopile support structures. Clear understanding of their corrosion-fatigue properties and accurate steel selection will support the optimisation and economic design of extra-large wind turbines. This paper presents the fatigue crack growth test results of advanced S355 TMCP steel in air and seawater, and compares the results with studies on commonly available S355 steel. The results show that S355 TMCP steels generally offer higher fatigue damage tolerance than normalised S355 steels in air and the factor decreases and tends towards a common value with increase in stress intensity factor range. However, in seawater there is no significant difference in fatigue crack growth rates for all the S355 ferritic steels considered in this study.

LanguageEnglish
Pages381-397
Number of pages17
JournalMarine Structures
Volume61
DOIs
Publication statusPublished - 1 Sep 2018

Fingerprint

Corrosion fatigue
Steel
Wind turbines
Fatigue crack propagation
Seawater
Damage tolerance
Economics
Ferritic steel
Fatigue damage
Air
Cost reduction
Stress intensity factors
Wind power
Fatigue of materials
Corrosion
Fabrication
Costs
Industry

Keywords

  • BS7910
  • corrosion-fatigue
  • fatigue
  • fatigue crack growth
  • offshore wind turbine
  • S355
  • seawater
  • steel

Cite this

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Materials selection for XL wind turbine support structures : a corrosion-fatigue perspective. / Igwemezie, Victor; Mehmanparast, Ali; Kolios, Athanasios.

In: Marine Structures, Vol. 61, 01.09.2018, p. 381-397.

Research output: Contribution to journalArticle

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AU - Kolios, Athanasios

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