Analysis of Asymmetrical Creep of a Ceramic at 1350°C by Digital Image Correlation. Issue 7 (23rd April 2015)

• Record Type: Journal Article
• Authors: Leplay, Paul; Lafforgue, Olivier; Hild, François; Zok, F.
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 7(2015)
• Page Start: 2240
• Page End: 2247
• Publication Date: 2015-04-23
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13601
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13601-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The glass industry requires the use of innovative ceramics that enable for long lifetimes. At very high temperatures, one of the key parameters for ceramics is their creep resistance. The characterization of the creep behavior, usually assessed through flexural tests, can be complex when an asymmetry appears between tension and compression. To detect and quantify such asymmetrical behaviors, the use of Digital Image Correlation (DIC) is proposed. First, several challenges are to be tackled for DIC at high temperature, namely, the random pattern stability, the radiation filtering and the heat haze. They are exacerbated by the limited possibilities to heat ceramics, the nonuniform strain fields and their low levels. Beyond several experimental developments, the strain uncertainties are decreased thanks to the use of two global approaches of DIC based on <italic>ad hoc</italic> finite‐element kinematics. Last, the proposed methodology is applied to the analysis of asymmetric creep at 1350°C of an industrial zircon ceramic designed for its high creep resistance.</p> </abstract>