A modified stress field intensity approach for fatigue life prediction of components. (May 2020)

• Record Type: Journal Article
• Authors: Zhao, Peng; Lu, TianYang; Gong, Jian-Guo; Xuan, Fu-Zhen
• Is Part Of: Materials & design. Volume 190(2020)
• Publication Date: 2020-05
• Subjects: Fatigue -- Life prediction -- Stress field intensity -- Multi-axial stress state; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2020.108537
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: In the present paper, a modified fatigue life model is proposed based on stress field intensity (SFI) approach, where the average weight function is introduced as the denominator of the traditional model and a modified definition of the fatigue zone is given using the concept of characteristic stress. Combined with finite element analysis, the fatigue life predictions of a central hole specimen from the literature and the notched plate specimens/a simulated engineering component conducted by the authors are carried out by the new model. Results indicate that the predicted lives are in good agreement with the experimental results and the modified stress field intensity approach is convenient for practical use. Graphical abstract: Unlabelled Image Highlights: Fatigue tests of notched plate specimens and a simulated engineering component are conducted. A modified stress field intensity approach is proposed for fatigue life prediction of the component. The proposed model could provide an adequate prediction solution and reduce computation efforts.