S0405-1-2 応力/ひずみ曲線の非線形性に基づいた多孔質セラミックスの損傷発展に関する新評価法(セラミックス/セラミックス基礎合材料I)

概要

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This paper describes a new proposal to evaluate damage evolution in porous ceramics according to the present authors' theory. The theory is based on parallel elements model and gives that the second order derivative of a stress/strain curve is proportional to a probability density function of strain at which each element is damaged. Uni-axial compression test was conducted for an insulating brick and its probability density function is obtained from the non-linear stress/strain curve. The function coincides well with acoustic emission data simultaneously measured in the compression test. This fact shows that the theory is useful for quick and brief estimation of damage initiation and its evolution in porous ceramics.
社団法人日本機械学会の論文
2009-09-12