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權宅鎭 慶北工業專門大學 1976 論文集 Vol.13 No.-
The body which has three orthogonal planes of elastic symmetry at each point is called orthogonally-anisotropic, or for brevity, orthotropic. The form of elastic symmetry is very important because it occurs in many isotropic materials used in mordern construction; for example, delta-wood and plywood can be considered as homogeneous and orthotropic in the first approximation. In the present paper, the three fundamental equation of the orthotropic plate are derived by Reissner's method including transverse shear deformation. These equations have been made of fourth-order partial differential equation.
剛體要素法으로 휨이 考慮된 쉘要素를 利用한 內壓容器의 彈塑性解析
權宅鎭,金勝德,朴剛根 成均館大學校 科學技術硏究所 1986 論文集 Vol.37 No.2
The Rigid Element Method(R.E.M) is a kind of the numerical discretization, techniques, such as the finite element method or the boundary element method, for getting the approximate solution of continuum mechanics problem. This method is originally developed for elasto-plastic analysis of wall-type precast reinforced concrete structures. In R.E.M., each discreted element is regarded as rigid body and the elements are interconnected with virtual springs with the stiffness of element. The springs transmit the axial force, the shear force and the normal force. The degree of freedom is placed in an arbitrary point within the element and the rigid displacements of this point affect other element through the springs being around the element. In this paper, it is derived the generalized adaptation matrix of shell elements which consider the effect of bending moment in thickness direction and developed a computer program using the present theory. Also, it is analyzed the behaviors of structure, that is, the distribution of stresses, the progress of cracks, the shape of deformation and the mode of fractures, for the hemispherical shell supported on cylinder under internal pressure.