Title of article :
Threshold fracture stress of thin ceramic components
Author/Authors :
Malzbender، نويسنده , , Jürgen and Steinbrech، نويسنده , , Rolf W.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
6
From page :
247
To page :
252
Abstract :
Strength is widely used as a design criterion to characterize the mechanical limits of brittle materials. However, depending on the flaw size distribution, measured strength values show considerable scatter. Statistically this spread can be represented for a specific specimen dimension using Weibull statistics with the characteristic strength, Weibull modulus and threshold strength. A comparison of three- and two-parameter Weibull approaches is exemplified using fracture stress results of thin bi-layer ceramic bending specimens taken from solid oxide fuel cell (SOFC) components. Considering statistical parameters and the flaw size limiting thickness of the substrate layer in a SOFC, the three-parameter Weibull statistics is demonstrated to be more appropriate for the fracture characterization of thin ceramic components.
Keywords :
fracture , Fuel cells , mechanical properties , Strength
Journal title :
Journal of the European Ceramic Society
Serial Year :
2008
Journal title :
Journal of the European Ceramic Society
Record number :
1409276
Link To Document :
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