Modeling the Effect of Boundary Conditions on the Stability of Multilayer Composite Structures: Case of Buckling Bifurcation. Analytical and Numerical Results Using “SHELL 181” Element

Analysis of buckling phenomenon of rectangular laminated plates with a hole under different boundary conditions

“…Perforated laminated plates were analysed for different boundary conditions: simple-simple-simplesimple (SSSS), simple-simple-simple-free (SSSF), simple-clamped-simple-free (SCSF), two different thickness t=0.23in; 0.355in, and four width b was varied from 6in, 5in, 4in and 3in and we kept diameter of hole constant d=0.312in. Meanwhile, the laminated plates were also analyzed without a hole to compare the influences having a hole and without a hole conditions on buckling loads [2]. Furthermore, the laminated plates were assumed to stack six laminas onto together namely cross-ply [(90°/+θ/-θ)] sym for symmetric and [(90°/+θ/θ)] a-sym for anti-symmetric ply with θ=15°,30°,45° and 60°.…”

“…Variation of the critical buckling load N x,cr compared to symmetric orientation of fibers of a plate 6 ×6 in 2 for t=0.23 in and t=0.355 in Variation of the critical buckling load N x,cr compared to anti-symmetric orientation of fibers of a plate 6 ×6 in 2 for t=0.23 in and t=0.355 in Variation of the critical buckling load N x,cr compared to aspect ratio a bfor [(90°/45°/-45°)] sym[2] …”

Development of complex of mathematical models at production stages of multilayer structures of spherical shape by polymerization method

“…Analytical theory of heat exchange is the scientific basic for the study of thermal processes proceeding in modern thermal-technical installations. Knowledge of the mechanisms of heat transfer allows to find the most optimal conditions for carrying out thermal processes, to create materials with set physical properties, to control technological processes of production, and to solve many other technical problems [3][4][5][6][7][8][9][10][11][12].…”