- Fatigue & Damage Tolerance Analysis
- Testing
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Stehlin Engineering adopted NX/NASTRAN as finite element code and FEMAP as pre- and postprocessor with SpaceClaim as CAD software. A robust interface between
CAD data and FEM data is provided via ASIS or PARASOLID engines. This permits
to model and analyse very complex 3D parts and give feedback to the designers
in electronic form if desired.
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Stehlin Engineering performs detailed stress analyses
of structures using established practices from the aerospace industry. The
company has built up a strong knowledge in the design and analysis of
composite, sandwich and classical reinforced skin-stringer structures with an
in-depth expertise in the calculation of local effects, such as load
introductions, connections, fittings, local instabilities, etc....
The company intensively
uses data sheets and manuals such as the ESDU's (Engineering Sciences Data
Unit), MIL Handbooks, ESA and NASA Handbooks, Bruhn, etc.
Fatigue & Damage Tolerance Analysis
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Stehlin Engineering adopted AFGROW as crack initiation and crack growth code
and FRANC2D as stress intensity computation tool.
In 2002, Stehlin
Engineering developed an original method to perform fatigue analysis of
bolted and riveted connections in a very efficient way using the Finite Element
Method. Stehlin Engineering has been selected to write a paper on this
subject for the ICAF 2003.
In 2012 Stehlin
Engineering developed a tool, which aim is to compute the stress
intensity factor (K) along a given crack path in function of the crack length
in structures idealized by PLATE elements in FEM models based on the NASTRAN
solver: pyNASSIF.
In 2014 Mr Thierry Stehlin
was selected to hold a presentation at the ASIP conference in name of ruag.
The presentation shows an application of the use of pyNASSIF
to perform CG analysis in a spar of the outer wing of the Swiss F/A-18 aircraft
(ASIP 2014).
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