Photoelastic analysis of matrix crack-tilted fiber bundle interaction |
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| Institution: | 1. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu, 212013, China;2. Department of Engineering Mechanics, Applied Mechanics Lab, Tsinghua University, Beijing, 100084, China;1. Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843-4242, United States;2. Institute of Applied Physics, Russian Academy of Science, 603950 Nizhny Novgorod, Russia;3. University of Nizhny Novgorod, 23 Gagarin Avenue, Nizhny Novgorod 603950, Russia;1. Experimental Techniques Section, Experimental Mechanics Division, Vikram Sarabhai Space Center, Indian Space Research Organization, Thiruvananthapuram 695 022, India;2. Experimental Mechanics Division, Vikram Sarabhai Space Center, Indian Space Research Organization, Thiruvananthapuram 695 022, India;3. Structural Engineering Entity, Vikram Sarabhai Space Center, Indian Space Research Organization, Thiruvananthapuram 695 022, India |
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| Abstract: | Matrix crack-tilted fiber bundle interaction was explored using photoelasticity. First, the isochromatic fringe patterns near the matrix crack tip, either shielded by a tilted fiber bundle or crossed by a broken fiber bundle, were observed. Then, the stress intensity factors of cracks at varying distances from the tilted fiber bundle were extracted from the isochromatic fringe patterns. Finally, finite element simulation was conducted in ABAQUS software to verify the experimental results, and the difference between photoelasticity measurement and FEM simulation were discussed. The results show that the mode I stress intensity factor of the crack near a tilted fiber bundle increases with the increase of crack length and decreases with the increase of the Young's modulus of the fiber bundle. However, the mode II stress intensity factor, which clearly increases as crack length increased and, as opposed to mode I, increases as the Young's modulus of the fiber bundle increased. |
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| Keywords: | Photoelastic Crack-fiber interaction Stress intensity factor Shielding Finite element method |
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