Statistical analysis of size effects on time-dependent fracture of an alumina

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27010

Title:	Statistical analysis of size effects on time-dependent fracture of an alumina
Authors:	Lin,CK;Chen,WS
Contributors:	機械工程學系
Keywords:	CRACK-PROPAGATION;CERAMIC MATERIALS;SILICON-NITRIDE;FATIGUE LIFE
Date:	1997
Issue Date:	2010-06-29 18:05:29 (UTC+8)
Publisher:	中央大學
Abstract:	Time-dependent fracture of an alumina under long-term static and cyclic loading was investigated by four- and three-point flexure tests. Bend bars with two different sizes were prepared to evaluate the size effects on the failure time distribution. The resulting stress-life data mere analyzed by two statistical time-dependent fracture theories which incorporate the statistics of strength and flaw size distribution with subcritical crack growth that leads to delayed fracture. The first model considers only the growth of a single major crack to a critical size while the second considers the size distribution of multiple flaws and their slow crack growth characteristics. Both models provided commonly acceptable description of the static and cyclic strength-probability-lifetime relationships for the experimental results from various specimen sizes and flexure modes.
Relation:	JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
Appears in Collections:	[Graduate Institute of Mechanical Engineering] journal & Dissertation

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