Studium mechanismu porušení tlakových lahví s umělým vrubem

Abstract

In the frame of this Diploma Thesis detailed structural investigations were carried out on pressure cylinders equipped with an artificial notch after the destructive pressure test. Investigations were performed on 50 l pressure cylinders, which had shown very different behaviour from the point of view of acoustic emission. In all pressure cylinders investigated the failure mechanism corresponded to shear ductile fracture. The failure spread in the direction of the maximum shear stresses generated under the artificial notch during the destructive pressure test. Short cracks occurred on fracture surfaces but the number of these defects did not correspond with the number of acoustic emission events recorded during the destructive pressure test. The results prove that „post mortem“ structural analysis does not allow unambiguously to assign individual acoustic emission events during the destructive pressure test of pressure cylinders to topographical details on fracture surfaces.