Fatigue crack growth under mixed mode I + III loading |
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| Institution: | 1. Fatigue and Fracture Lab., Centre of Excellence in Experimental Solid Mechanic and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak 16846, Tehran, Iran;2. Center for Composite, Institute for Vehicle System and Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia;1. Faculty of Mechanical Engineering, Department of Mechanics, Material Science and Engineering, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland;2. INEGI/Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;3. ISISE/Department of Civil Engineering, University of Coimbra, Rua Luís Reis Santos, Pólo II, 3030-788 Coimbra, Portugal;1. Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest JIAOTONG University, Chengdu 610031, China;2. Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China, Chengdu 610031, China;3. Shanghai Electric Power Plant Equipment Co., Ltd., Shanghai 200240, China |
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| Abstract: | Mixed mode I + III fatigue crack growth is studied numerically and experimentally by using modified CT specimen. Some parameters such as initial angle and initial length of crack, thickness and load ratios can affect the fatigue behaviors. The crack growth path and surface, crack front length, variations of stress intensity factors, twisting of crack surface and fatigue lives were determined by using Franc3d and compared with experimental data. By increasing angle and length of initial crack, mode I effects decrease while mode III effects increase. Mode II of the fracture is almost negligible for the modified CT specimen. |
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| Keywords: | Mixed mode I + III Crack path Fatigue crack growth Fracture surface Modified CT specimen |
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