Lifetime of disks of variable thickness with anisotropy of fatigue properties taken into accountстатья
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Дата последнего поиска статьи во внешних источниках: 7 марта 2018 г.
Аннотация:A generalization of well-known criteria for multiaxial fatigue fracture to the case of titanium alloys with anisotropic fatigue properties is proposed. The problem of determining the stress-strain state and estimating the fatigue life of a rotating disk of variable thickness under the action of centrifugal loads in the disk and blades is solved. The proposed criteria for multiaxial fatigue fracture are used to obtain spatial lifetime distributions over the disk in the isotropic and anisotropic cases. It was shown that the fatigue life of the titanium disk with the anisotropy of the fatigue properties taken into account can decrease to the critical values of N, 10(4) cycles near the outer rim of the disk in the region of contact with blades, which is inadmissible from the standpoint of safe operation.