When a power laser beam irradiates a thin-walled missile structure, the temperature of the irradiated region increases rapidly, which results in compressive thermal stresses being developed together with softening of the shell wall. Theoretical predictions of the buckling resistance of isotropic plates and shells, subjected to axial compression loading and a laser-induced nonuniform temperature field, have been developed and are presented. Material properties are assumed to be temperature dependent, which results in the thermal-buckling behavior being nonlinear with respect to temperature. Theoretical predictions are presented for a cylindrical shell subjected to axial compression loading and irradiated by a powerful laser beam. These show that the buckling resistance was significantly reduced by the combined action of axial compression loading and laser irradiation. Hence, it is likely that sudden buckling-induced failure may occur that can cause failure of highly optimized, lightweight cylindrical shells.
Thermal buckling of axially precompressed cylindrical shells irradiated by laser beam
Das thermische Ausbeulen von laserbestrahlten axial vordruckbelasteten Zylinderschalen
AIAA Journal ; 38 , 10 ; 1789-1794
2000
6 Seiten, 4 Bilder, 7 Tabellen, 19 Quellen
Article (Journal)
English
Zylinderschale , Wärmebelastung , Wärmespannung , Knickung , Verwerfung (Verformung) , Vorbelastung , Axialbelastung , Laserbestrahlung , Dünnwand , Luftfahrzeug , Temperaturanstieg , thermische Spannung , Entfestigung , Knickfestigkeit , Platte (Theorie) , isotrope Eigenschaft , Temperaturabhängigkeit