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The boundary collocation method was used to generate Mode I stress intensity and crack mouth opening displacement coefficients for externally radially (through-the-thickness) cracked ring segments subjected to three-point radial loading. Numerical results were obtained for ring segment outer-to-inner radius ratios (Ro/Ri) ranging from 1.10 to 2.50 and crack length to segment width ratios (a/W) ranging from 0.1 to 0.8. Stress intensity and crack mouth displacement coefficients were found to depend on the ratios Ro/Ri and a/W as well as the included angle between the directions of the reaction forces.
fracture mechanics, fracture, cracks, radially cracked ring segment, stress intensity factor, crack mouth opening displacement, boundary collocation analysis
Materials Engineer, Structural Materials, National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH
Scientific Consultant to Fatigue and Fracture Branch, National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH
Head, Fracture Research Section, National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH