Layup optimization against buckling of shear panels

摘要: The object of the study was to optimize shear buckling load laminated composite plates. laminates lacked coupling between bending and extension (Bij=0) but had otherwise arbitrary selection ply angle variation through thickness. plates were rectangular either simply supported or clamped on all edges. For orthotropic plates, it seen that there is only one parameter necessary for finding optimal design different materials plate aspect ratios. This can be interpreted as layup angleθ in a (+/−θ) laminate. When bendingtwisting present, strength depends direction applied load. A laminate with non-zero bending-twisting stiffnesses described four lamination parameters. allowable region these parameters investigated, an optimization within this performed. It even problem. anlgeθ off-axis unidirectional (θ).