常圧焼結窒化けい素セラミックスの突起部付高温引張クリープ試験片の最適設計

概要

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A tensile creep specimen with projections was designed to measure the creep displacement by means of the laser beam displacement meter at temperatures elevated beyond 1000℃. Stress/strain concentrations, however, occur around the root of projections in this specimen. The high-temperature creep strain was determined form the measurement of tensile displacement between the two projections by correcting influence of the projections. The procedure used to determine the steadystate creep constitutive equation of Si_3N_4 ceramics was proposed by combining a high-temperature creep test using the speciment with projections and the finite-element method (FEM) calculations for the specimen. Furthermore, the method for designing the optimum creep specimen with projections was proposed via the FEM calculations using the steady-state creep constitutive equation.
一般社団法人日本機械学会の論文
1997-09-25