セラミックスの熱衝撃疲労抵抗性の確率論的評価(<小特集>先進材料と信頼性解析・評価)

概要

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The remaining strength of ceramics after repeated thermal shocking was analyzed theoretically, and the probability of crack occurrence was predicted. In this analysis, the Weibull statistical theory of fracture was applied to repeated thermal shocking of ceramics assuming that thermal shock fracture of ceramics was due to crack growth from one of initial flaws. For the verification of this proposed analysis, tests on alumina, silicon carbide and silicon nitride samples with various diameters were conducted under various repeated thermal shock conditions of water quenching. As a result, analytical results were found to be in good agreement with results of repeated thermal shock tests. Thus, the probability of crack occurrence can be evaluated from the normalized fracture strength using effective volume and effective stress hold time.
一般社団法人日本機械学会の論文
1995-09-25