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Truss in fatigue modelling

Posted 6 déc. 2018, 03:26 UTC−5 1 Reply

Alexia Eng
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Is the fatigue model only available for solid mechanical modeling? How to simulate the fatigue model for truss modeling (edge molder)?

1 Reply Last Post 6 déc. 2018, 08:24 UTC−5
Henrik Sönnerlind COMSOL Employee

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Posted: 7 years ago 6 déc. 2018, 08:24 UTC−5

Hi,

The Fatigue Module is to a large extent is geared towards multiaxial stress states. It can deal with solids, shells, and membranes. In a truss element, there is only a single stress component, so in most cases the fatigue evaluation can be done using pen and paper.

Furthermore, a truss representation is usually an abstraction where the actual geometry of the bar ends is ignored. That is however where fatigue problems would occur in the real structure.

Regards,
Henrik

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Henrik Sönnerlind
COMSOL
Hi, The Fatigue Module is to a large extent is geared towards multiaxial stress states. It can deal with solids, shells, and membranes. In a truss element, there is only a single stress component, so in most cases the fatigue evaluation can be done using pen and paper. Furthermore, a truss representation is usually an abstraction where the actual geometry of the bar ends is ignored. That is however where fatigue problems would occur in the real structure. Regards, Henrik

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