Akademik Veri Yönetim Sistemi
Journal of the Brazilian Society of Mechanical Sciences and Engineering, cilt.47, sa.9, 2025 (SCI-Expanded)
The buckling and failure behavior of sectionally strengthened laminated composite cylindrical panels under external hydrostatic pressure is analyzed, and the most effective strengthening strategies are identified for two specific panel geometries with relatively low and high Batdorf-Z parameter values. The strengthening is assumed to be achieved by sectionally bonding additional unidirectional plies in the hoop direction to the top and bottom surfaces of the panels. Four strengthening schemes are evaluated, and the optimal schemes for the two cases are identified under four distinct sets of edge rotational boundary conditions. A degenerated shell finite element model, incorporating the pressure stiffness effect, is employed to determine the linear and nonlinear buckling pressures as well as the first-ply failure pressures. The numerical results demonstrate that the failure pressures of relatively deep, curved-edge simply supported panels can be significantly enhanced through sectional strengthening with small increase in total weight. The results obtained also show that strengthening may unexpectedly cause a decrease in failure pressure due to occurrence of an unfavorable stress distribution depending on the degree of shallowness and edge rotational boundary conditions.