Analysis of stress concentration phenomenon of cylinder laminated shells using higher-order shear deformation Quasi-3D theory

摘要

This paper presents the stress concentration phenomenon at the points with force jumping, structural jumping and sudden changes of boundary conditions of cylinder laminated shells. The three-dimensional linear elastic equation is transformed into the two-dimensional linear elastic equation of the cylinder laminated shell by using the variational method and analyzing the displacement field into a polynomial function sequence according to the shell thickness. Equilibrium equations are achieved corresponding to the case of analyzing the displacement field into the cubic function. Based on established equations, we study the jumping zone phenomenon of the stress field in the structure. Effects of boundary conditions, the relative thickness and the relative length of the shell are investigated. Then, the application areas of each case based on the computed results are figured out when using these types of structures in engineering practice.