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Fatigue Analysis

TWI’s fatigue specialists draw on many decades of accumulated research and expertise in fatigue analysis, design, assessment and testing, covering all industry sectors.

We provide:

  • Consultancy on fatigue design and assessment
  • Instrumentation and strain monitoring of structures
  • Fatigue crack repair and life extension
  • Residual stress measurement
  • Fatigue testing of materials and components
  • Fatigue testing of materials in a corrosive environment
  • Resonance fatigue testing

TWI guidance, Fatigue design rules for welded steel joints, informed the progenitors of many of today's national and international fatigue design standards. We continue to participate in standards committees and play a leading role in the development of many current standards, including BS 7608:2014, BS 7910:2013, Eurocode 3 and IIW guidance documents.

What is Fatigue?

Fatigue is a progressive cracking mechanism which develops as a result of cyclic stresses. It is still the most common mode of failure in structural and mechanical components and can lead to major failures, with severe consequences to plant, equipment, the environment and human lives.

Our Track Record

Fatigue is relevant to all industries and to every component which experiences cyclic forces. We regularly work with the oil and gas, power and construction industries on components including girth welds in pipelines and risers, joints in offshore structures, bridges, pressure vessels, cranes, earth-moving equipment and road and rail vehicles.

By drawing on TWI’s expertise and considering the effects of fatigue at the design stage, Industrial Members can avoid common mistakes in fatigue design which potentially could result in premature failure. In the long term, this can result in significant cost savings through reduced repair costs.

For more information, please email:

For more information please email: