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Fatigue design


​We focus on

conducting field measurements and computational analyses (FEA) of fatigue critical structures (e.g. welded structures) and dynamic structures. We have decades of experience of industrial troubleshooting projects. 

For the specific tasks we can help You with, see Offerings.  Design procedures and tools are presented in details in Tools and Facilities.

fatigue-description.jpgOur main application areas are:

  • Marine structures (ships and offshore)
  • Rotating machinery
  • Vehicles (rolling stock)
  • Mobile working machines
  • Aviation / aerospace
  • Military (ships and aeroplanes)



​​​Recovering from fatigue failures

Basic (including failure analysis), extensive and additional surveys and support for service actions.


​​​Fatigue design in product development

VTT considers the whole product development process: materials, manufacturing processes, computational designs, testing and validation.

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Computational tools

VTT has licences for several analysis softwares, e.g. for FE-modelling (Abaqus, Ansys etc.) and data acquisition (Famos etc.) which we can use for fatigue assessment studies. Fatigue spesific software (nCode, FE-safe etc.) can also be used. In addition we use open source scripting environment such as python (programming language) and open source software such as Code_Aster (FE-modelling).

Experimental tools

We have field measurement equipment for up to several hundred channels and reseach hall that is a well-equipt facility for structural testing.

In-house design procedures and tools

VTT has created a variety of design procedures and tools. Here are few of them:



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  • For large test specimens
  • Material testing machines for up to 2 MN for both static and dynamic loading
  • Material testing machines for static loading, up to 4,5 MN (compression)
  • 10 Hz




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  • For fatigue tests of small specimens
  • Maximum static load: 250 kN, maximum dynamic stroke: ± 125 kNa
  • Maximum dynamic stroke: 4 mm
  • Frequenzy range: 40-260 Hz (The operating frequency depends on the stiffness of the specimen including fixture assembly as well as on the activated oscillating masses.)