A generalized criterion for fatigue crack growth in additively manufactured materials - Build orientation and geometry effects

被引：27
作者：
Mirsayar, M. M. [1 ]
机构：
[1] Florida Inst Technol, Dept Aerosp Phys & Space Sci, Melbourne, FL 32901 USA
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 145卷
关键词：
Additive manufacturing; Fatigue crack growth; Strain energy density; Build orientation; T-stress; BI-MATERIAL NOTCHES; T-STRESS; LOAD RATIO; FRACTURE; STEEL; SIZE; PROPAGATION; POLYMERS; BEHAVIOR; KINKING;
D O I：
10.1016/j.ijfatigue.2020.106099
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effect of material anisotropy on the fatigue crack growth (FCG) behavior in additively manufactured materials is investigated by developing an energy-based criterion. The criterion is developed based on the strain energy density concept in an anisotropic domain and considers the effects of specimen geometry by introducing the T-stress in the solution. The proposed criterion is examined by predicting the FCG experimental results available in the literature for 3D-printed Inconel 718 and 17-4PH stainless steel components built in different orientations. It is found that both material anisotropies resulting from build orientation and the T-stress play remarkable roles in FCG behavior of 3D-printed components.
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页数：9
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