EVALUATION OF RELIABILITY OF RUPTURE AND ROTATIONAL STRENGTH OF THE CERAMIC TURBINE WHEEL
Pages: 50 - 59
|
|
Participants:
HAIDER HADI JASIM |
Summary:
In this paper, Weibull uni-axial and multi-axial distribution function is applied to evaluate the
reliability of the fracture strength of rotating turbine rotor wheel manufactured from ceramic
material and have inner surface crack. Three cases are considered, first taking only the effect
of rotational stresses, second taking the effect of rotational and thermal stresses in ceramic
disc, and third taking the effect of rotational and thermal loading in ceramic blade. It was
found that there is a convergence between results gotten from uni-axial and multi-axial
distribution function, but multi-axial distribution function give small large in values result
compared to uni-axial distribution function. The expected values of rupture strength of
ceramic blade is higher than of that of disc material, therefore the failure occurs in blade first
than in disc material in service survival.