Abstract
This paper considers two different damage formulations for modelling high-cycle fatigue of materials. The underlying fatigue model is formulated within continuum mechanics framework with the concept of a moving endurance surface. Such a model has a unique feature that it allows for the concepts of fatigue limits and damage accumulation during the load history thus avoiding cycle-counting techniques. A Scalar and tensor type of damage variables are utilized with an essentially similar type of damage evolution law. The tensor damage model capable of accounting for damage induced anisotropy is based on the gradient of the endurance surface. The performance of the scalar and tensor damage formulations are compared with different multidimensional stress histories.
Original language | English |
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Title of host publication | Proceedings of the XII Finnish Mechanics Day |
Pages | 57-62 |
Number of pages | 6 |
ISBN (Electronic) | 978-952-93-5608-9 |
Publication status | Published - May 2015 |
Publication type | B3 Article in conference proceedings |
Event | Finnish Mechanics Days - Duration: 1 Jan 1900 → … |
Conference
Conference | Finnish Mechanics Days |
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Period | 1/01/00 → … |
Keywords
- high-cycle fatigue modelling
- isotropic damage
- anisotropic damage
- endurance surface
- evolution equations