کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5440719 1398235 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of the scatter of strength and of measurement uncertainties on the determination of the subcritical crack growth exponent in ceramics and glasses
ترجمه فارسی عنوان
تأثیر پراکندگی قدرت و عدم اطمینان اندازه گیری بر تعیین شاخص رشد کریستال در سرامیک و عینک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
Subcritical crack growth (SCCG) in glasses and ceramics causes a decrease of strength with time under applied load. The dependence of the crack growth rate with the stress intensity factor can be approximated by a power law, with n being the SCCG exponent. In this work the effect of the inherent scatter of strength as well as measurement uncertainties on the determination of n is analysed. Constant stress rate tests as proposed in the EN 843-3 standard are simulated using Monte Carlo techniques. It is shown that the large scatter of strength causes large uncertainties on the determination of n, yielding a significant influence of the sampling procedure especially for small samples. Measurement uncertainties have a surprisingly low influence on the determination of n with exception of a special situation that may arise during long time testing campaigns.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 4, April 2017, Pages 1873-1878
نویسندگان
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