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Geometric Nonlinear Behavior Of Shallow Shells By Boundary Conditions
Park, Kanggeun,Lee, Dongwoo,Choe, Dongil,Park, Mijin SSNG Education Society 2017 International journal of latest trends in engineer Vol.8 No.4
<P> This paper investigates the mechanical characteristics of geometrical nonlinear behavior of shallow shells for boundary conditions of support. The shallow shells with a low rise-span ratio have a snap back and through behavior for a load condition or a support condition. The analytical models are a spherical shell, a cylindrical shell and a quadratic shell. The shells with all its edges hinged or fixed support condition are subjected to a concentrated load at the crown. The load is applied gradually by incrementing the deflection by displacement control. The objective of the study is to compare the load deflection curves according to support conditions or thicknesses. The element in the nonlinear analysis used 3-D four/eight nodes shell element and 3-D laminated composite shell element. In geometric nonlinear behavior of shallow shells, it will be observed for snap back and through behavior for a hinged and fixed support condition. The snap through phenomenon cannot be found in the load deflection curve of shells with the fixed support and the good results are observed for large deflection analysis of shells with hinged supports. </P>