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High temperature Fatigue Modeling
Posted 9 ago 2023, 02:06 GMT-4 Version 6.1 1 Reply
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Hello
I can perform LCF and HCF fatigue modeling, following the example below
https://www.comsol.com/model/elastoplastic-low-cycle-fatigue-analysis-of-cylinder-with-a-hole-2200
However, I want to include the effect of temperature. For instance I want model the fatigue tests at 600 degrees. How do I modify the example above to include the effect of temperature? Thanks
Samuel
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There are some effects of temperature that you need to take into account:
- You need a new set of fatigue parameters measured at the current temperature.
- You may want to take temperature dependence of other material properties, such as Young's modulus, into account. At elevated temperature, it is probably the yield stress that is most important (in case you are in the LCF regime).
- You may need to take thermal expansion into account. If the temperature is homogeneous, there are no stress gradients from the stress distribution itself, but depending on the boundary conditions, thermal stresses may be introduced in the structure.
Henrik Sönnerlind
COMSOL