MATEC Web Conf.
Volume 165, 201812th International Fatigue Congress (FATIGUE 2018)
|Number of page(s)||6|
|Section||High Cycle Fatigue, Fatigue at Notches|
|Published online||25 May 2018|
Continuum damage mechanics based approach to the fatigue life prediction of cast aluminium alloy with considering the effect of porosity
Institute of Solid Mechanics, School of Aeronautic Science and Engineering, Beihang University, China
2 Institute of Solid Mechanics, School of Aeronautic Science and Engineering, Beihang University, China
3 Institute of Solid Mechanics, School of Aeronautic Science and Engineering, Beihang University, China
* Corresponding author: firstname.lastname@example.org
A damage mechanics based approach is applied for the study of fatigue behaviour of high pressure die cast ADC12 aluminium alloy. A damage coupled elastoplastic constitutive model is presented according to the concept of effective stress and the hypothesis of strain equivalence. An elastic fatigue damage model taking into account the pore-induced stress concentration is developed to investigate fatigue damage evolution of the specimens subjected to cyclic loading. The predicted lives for the specimens with different sizes of pores are consistent with the experimental data. The pore-induced fatigue damage and the variation of fatigue life along with the size of pores are also investigated.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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