セラミックスの信頼性評価と設計基準

概要

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This paper describes a probabilistic evaluation method for ceramic components under arbitrary loading conditions. In this paper, Batdorf theory was extended to include the material degradation caused by the slowcrack-growth. The method proposed here is applicable to evaluate the fracture probability for an arbitrary load varying with respect to time such as transient thermal loading, the life distribution under static and cyclic fatigue loading and the fracture probability of a component degraded by pre-loading which includes proof testing. This paper also proposes a design guidance enabling to, design ceramic components by simple design formulae, the bases of which are on the method mentioned above. The design formulae account for the fracture probability aspects. Thus ceramic component design for a given reliability level can be done using the proposed formulae. The design formulae are available for preventing the fast fracture and time-dependent fracture of both virgin and proof tested components.
社団法人日本ガスタービン学会の論文
1990-09-10