Abstract: A protection ring of fiber material is constructed for containing or stopping fragments of a bursting structural component passing through a housing, such as a gas turbine housing through which a rotor blade fragment has burst by centrifugal force. Retaining pins are distributed around the housing zone to be protected. The fiber strands are looped around the retaining pins to form a fiber netting without any matrix material. Friction between fibers and pins is kept low so that the fibers can stretch along substantially their entire length for taking up impact energy. Thus, substantially the entire volume of the ring can participate in taking up impact energy and not only a localized ring portion that received an impact. A desirable lightweight structure is achieved.

Abstract: A rupture prevention ring consists of two coaxially arranged, spaced-apart stiff end rings wrapped in several layers of fiber cloth. Resin bonding is used around the end rings while in the intermediate area between the end rings, the fibers are not free of resin and hence not stiffened. Owing to the high energy absorption capability of the structure including the elastic yielding of the fibers without the resin, an excellent containment ability is obtained at a low weight. Fragments are effectively retained without jeopardizing the rotating blade and disk assembly of the damaged stage.