13th International Conference on Fracture June 16–21, 2013, Beijing, China -7- Examinations for change of radius of curvature around singularity point ・ Stress value σφφ decreases with increasing the radius of curvature R. ・ Constant stress region of σφφ near point O, i.e., stress singularity disappearance region, increases with increasing the radius of curvature R. ・ Intensity of stress singularity K1φφ almost linearly decreases with increasing the radius of curvature R. Examinations for change of Young’s modulus of resin in case of R=3.125μm model ・ Value of stress σφφ decreases with increasing Young’s modulus of resin E2. ・ Intensity of stress singularity K1φφ decreases with increasing Young’s modulus of resin E2. References [1] T. Kurahashi, A. Ishikawa and H. Koguchi, Evaluation of Intensity of Stress Singularity for 3D Dissimilar Material Joints Based on Mesh Free Method, 11th International Conference on the Mechanical Behavior of Materials, Procedia Engineering, 10, (2011) 3095-3100 . [2] Hideo Koguchi, Kazuhisa Hoshi, Evaluation of joining strength of silicon-resin interface at a vertex in 3D joint structures, InterPACK2011, (2011). [3] T.Belytschko, Y.Y.Lu and L.Gu, Element-free Garerkin methods, Int. J. Numer. Meth. Engrg., 37(5), (1994) 229-256. [4] S.S.Pageau and S.B.Bigger,JR, Finite element evaluation of free - edge singular stress fields in anisotropic materials, Int.J.Numer.in Engng., 38, (1995) 2225-2239.
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