. . "Anisotropy." . . "Rotor blades." . . . . . . "Experimental and analytical investigation of dynamic characteristics of extension-twist-coupled composite tubular spars"@en . "Experimental and analytical investigation of dynamic characteristics of extension-twist-coupled composite tubular spars" . . . . "Experimental and analytical investigation of dynamic characteristics of extension-twiet-coupled composite tubular spars"@en . . . . . . . . . . . "Dynamic structural analysis." . .