Weibull analysis of modulus of rupture of the slip-cast amorphous silica (SCAS) determined by the 4-point bending test

UdayaKumar, A and Vyjayanthi, N and Venu, PG and Kannan, TS and Narayana, R and Viswanath, S (2003) Weibull analysis of modulus of rupture of the slip-cast amorphous silica (SCAS) determined by the 4-point bending test. InterCeram: International Ceramic Review, 52 (2). pp. 90-94.

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Abstract

Modulus of Rupture (MOR) measurements were conducted at room temperature on slip cast amorphous silica bar (50 mm xD7; 8 mm xD7; 6 mm) specimens. The resultant MOR values were then statistically analysed employing the Weibull statistical procedure. It was found that a scatter always exists in the measured MOR values due to the inherent statistical nature of flow distribution in the case of monolithic ceramic specimens. The variability of measured MOR values was modelled using the well-known Weibull statistics. A population (n) of 68 bars was used for Weibull analysis and a Weibull modulus of m = 5.4 was obtained for the total set of all the specimens. The test specimens were generated by slicing from a single slip cast and sintered amorphous silica block (50 mm xD7; 50 mm xD7; 160 mm). An improved Weibull modulus value could be achieved by adopting this procedure as compared to the authors' earlier studies where the test specimens of the size 50 mm xD7; 8 mm xD7; 6 mm were individually processed (slip cast and sintered) and then subjected to MOR test.

Item Type: Journal Article
Uncontrolled Keywords: 4-point bending test; Slip-cast amorphous silica; Weibull analysis; Amorphous materials; Casting; Ceramic materials; Mathematical models; Sintering; Statistical methods; Weibull distribution; High creep resistance; Silica;
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Other, Other, Materials Science Division, Structures Division, Structures Division
Depositing User: MS Jayashree S
Date Deposited: 07 Jan 2005
Last Modified: 24 May 2010 09:38
URI: http://nal-ir.nal.res.in/id/eprint/54

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