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Title of article :
Room temperature viscosity and delayed elasticity in infrared glass fiber
Author/Authors :
Bernard، نويسنده , , C. and Delaizir، نويسنده , , G. and Sangleboeuf، نويسنده , , J.-C. and Keryvin، نويسنده , , V. S. Lucas، نويسنده , , P. and Bureau، نويسنده , , B. and Zhang، نويسنده , , X.-H. and Rouxel، نويسنده , , T.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
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Abstract :
Infrared transparent optical fibers from the Te–As–Se system (TAS) exhibit a viscoelastic behavior at room temperature. The study of the change of the radius of curvature of fibers, once the fibers are unrolled from the mandrel onto which they were rolled just after fiber-drawing, allows the determination of constitutive laws both for the stress relaxation kinetics and for the delayed elasticity process. Whereas, a linear Burgerʹs model provides a good modelling of the stress relaxation stage, a stretched exponential function gives a better description for the delayed elasticity behavior. The room temperature viscosity of the fibers ranges from 3 × 1016 to 2 × 1017 Pa s and the time constant of the anelastic strain recovery process is from 4 to 15 days.
Keywords :
GLASS , Fibers , Creep , mechanical properties
Journal title :
Journal of the European Ceramic Society
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Link To Document :