P048 多孔質セラミックスの破壊特性に及ぼす損傷許容性の影響(フェロー賞表彰対象ポスターセッション)

概要

論文の詳細を見る
Porous ceramics is expected to be applied as cleanup filter under high temperature environment since it has high damage tolerance ability. We have investigated effect of damage tolerance ability on fundamental fracture properties by carrying out 4-point bending test under loading rates. As the result, at above loading rate of 0.5mm/min, strengths increased with increasing loading rate. Because it is only depended at slow crack growth of one of the flaws in this material. In contrast, at the loading rates below 0.5mm/min, strengths also increased. It is considered that resistance to crack growth increased due to release of accumulated internal energy since grain boundary markedly fails with decreasing loading rate. These phenomenon was explained by unified strength estimation method considering effect loading rate.
一般社団法人日本機械学会の論文
2007-10-24