ハイブリッドストレスモデルによる辷り線,塑性関節,塑性関節線の表現

概要

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In order to overcome difficulties encountered in the present FEM nonlinear analysis, one of the authors Kawai has proposed a family of new discrete elements which are called the Rigid Body Spring Models (abbreviated RBSM). Through basic studies of these elements they are proved to be very useful in limit analysis of structures or solids in general but it was also found that convergency of elastic solution may not be guaranteed. For improvement of the RBSM models, another new element is proposed by one of the authors Watanabe using the principle of the hybrid complementary energy, and a family of such hybrid strss models are developed for the bending problem of beams, in-plane as well as bending problems of plates. It should be mentioned that the effects of shear deformation can be easily taken into account in bending analysis beam and plate problems. In the Mechanism Method, so-called plastic hinges, plastic hinge lines or slip lines must be assumed for calculation of limit loads. They are lines of displacement discontinuity. In the present method these problems can be treated as the contact problems. It is shown by numerical examples that they are in good agreement with exact solutions of plastic analysis and effect of element deformation can be taken into account in the analysis.
社団法人日本船舶海洋工学会の論文