کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5435923 1509541 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of microcracking on the uniaxial tensile response of β-eucryptite ceramics: Experiments and constitutive model
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of microcracking on the uniaxial tensile response of β-eucryptite ceramics: Experiments and constitutive model
چکیده انگلیسی

A constitutive model for the nonlinear or “pseudoplastic” mechanical behavior in a linear-elastic solid with thermally induced microcracks is developed and applied to experimental results. The model is termed strain dependent microcrack density approximation (SDMDA) and is an extension of the modified differential scheme that describes the slope of the stress-strain curves of microcracked solids. SDMDA allows a continuous variation in the microcrack density with tensile loading. Experimental uniaxial tensile response of β-eucryptite glass and ceramics with controlled levels of microcracking is reported. It is demonstrated that SDMDA can well describe the extent of non-linearity in the experimental uniaxial tensile response of β-eucryptite with varying levels of microcracking. The advantages of the SDMDA are discussed in regard to tensile loading.

We develop a constitutive equation termed strain dependent microcrack density approximation (SDMDA) that models the uniaxial tensile behavior of β-eucryptite with various levels of microcracking. Model results are compared with experimental results on specimens that were heat treated to produce different levels of microcracking.110

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 135, 15 August 2017, Pages 361-371
نویسندگان
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