Enhanced multiaxial fatigue criterion that considers stress gradient effects
(2018) In International Journal of Fatigue 116. p.128-139- Abstract
Modification of a fatigue criterion valid for homogeneous multiaxial stress states to account for the beneficial effect of stress gradients is traditionally performed by modifying the stress terms in the fatigue criterion and thereby introducing new parameters that need to be calibrated. Here the stress terms are left unchanged and, instead, the parameters in the fatigue criterion are modified. This modification is performed, in principle, along the lines of Siebel and Stieler and it introduces Neuber's parameter as the only new parameter; however, as soon as the ultimate strength of the material is known, also Neuber's parameter is known. Therefore, the methodology introduced implies that no new calibration process is needed. Here a... (More)
Modification of a fatigue criterion valid for homogeneous multiaxial stress states to account for the beneficial effect of stress gradients is traditionally performed by modifying the stress terms in the fatigue criterion and thereby introducing new parameters that need to be calibrated. Here the stress terms are left unchanged and, instead, the parameters in the fatigue criterion are modified. This modification is performed, in principle, along the lines of Siebel and Stieler and it introduces Neuber's parameter as the only new parameter; however, as soon as the ultimate strength of the material is known, also Neuber's parameter is known. Therefore, the methodology introduced implies that no new calibration process is needed. Here a specific fatigue criterion valid for homogeneous multiaxial stress states is enhanced by this procedure and predictions of this simple approach are compared with a broad range of experimental data and good accuracy is achieved. Moreover, the approach adopted can be applied to other fatigue criteria than the one considered here.
(Less)
- author
- Ottosen, Niels Saabye LU ; Ristinmaa, Matti LU and Kouhia, Reijo
- organization
- publishing date
- 2018-11-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Fatigue, Gradient effects, Multiaxial fatigue
- in
- International Journal of Fatigue
- volume
- 116
- pages
- 12 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85048733879
- ISSN
- 0142-1123
- DOI
- 10.1016/j.ijfatigue.2018.05.024
- language
- English
- LU publication?
- yes
- id
- e94d2ee8-2433-4398-ba4e-5cbc8e08b41f
- date added to LUP
- 2018-06-27 15:20:53
- date last changed
- 2022-04-25 08:07:57
@article{e94d2ee8-2433-4398-ba4e-5cbc8e08b41f, abstract = {{<p>Modification of a fatigue criterion valid for homogeneous multiaxial stress states to account for the beneficial effect of stress gradients is traditionally performed by modifying the stress terms in the fatigue criterion and thereby introducing new parameters that need to be calibrated. Here the stress terms are left unchanged and, instead, the parameters in the fatigue criterion are modified. This modification is performed, in principle, along the lines of Siebel and Stieler and it introduces Neuber's parameter as the only new parameter; however, as soon as the ultimate strength of the material is known, also Neuber's parameter is known. Therefore, the methodology introduced implies that no new calibration process is needed. Here a specific fatigue criterion valid for homogeneous multiaxial stress states is enhanced by this procedure and predictions of this simple approach are compared with a broad range of experimental data and good accuracy is achieved. Moreover, the approach adopted can be applied to other fatigue criteria than the one considered here.</p>}}, author = {{Ottosen, Niels Saabye and Ristinmaa, Matti and Kouhia, Reijo}}, issn = {{0142-1123}}, keywords = {{Fatigue; Gradient effects; Multiaxial fatigue}}, language = {{eng}}, month = {{11}}, pages = {{128--139}}, publisher = {{Elsevier}}, series = {{International Journal of Fatigue}}, title = {{Enhanced multiaxial fatigue criterion that considers stress gradient effects}}, url = {{http://dx.doi.org/10.1016/j.ijfatigue.2018.05.024}}, doi = {{10.1016/j.ijfatigue.2018.05.024}}, volume = {{116}}, year = {{2018}}, }