CHARACTERISTICS OF STRESS CONCENTRATION AT DISCONTINUOUS BOUNDARY CONDITOIN AREA OF PARTIAL CYLINDRICAL SHELLS

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  • 部分円筒シェルの不連続な境界条件部における応力集中の特性
  • ブブン エントウ シェル ノ フレンゾク ナ キョウカイ ジョウケンブ ニ オケル オウリョク シュウチュウ ノ トクセイ

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Abstract

The elastostatic analysis of stress concentration occurring around discontinuous (mixed) boundary of cylindrical shell roofs is performed. Firstly as approximate solution, theoretical plane stress and plate solution satisfying discontinuous boundary are derived with eigen function expansion or Muskhelishvili's method of Hirbert ploblem. Secondly FE analysis is performed. And Stress Resultant Intensity Factors (SRIF, like stress intensity factor in fracture mechanics) are calculated for various thickness or open angle models. Stresses around discontinuous boundary show singular behavior of 1/√r(r is distance from discontinuous point) which is same to one of crack problem. Smaller thickness increases In-Plane SRIF but decreases Bending SRIF. Larger open angle decreases Bending SRIF. Influence of open angle to In-Plane SRIF depends on the combination of boundary conditions.

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