کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7961289 1513930 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Probabilistic response of heterogeneous particle reinforced metal matrix composites with particle size dependent strengthening
ترجمه فارسی عنوان
واکنش احتمالی کامپوزیت های ماتریس تقویت شده ذرات ناهمگن با تقویت وابسته به اندازه ذرات
کلمات کلیدی
پاسخ مادی احتمالی، روش عنصر محدود کامپوزیت ماتریس فلزی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی
This paper presents an enhanced continuum model for a heterogeneous particle arrangement to simulate the variability in the size dependent strengthening of silicon carbide (SiC) ceramic particle reinforced metal matrix composites (MMCs). The model incorporates a size dependent “punched” zone around the particles that is the result of a local increase in dislocation density during thermal processing due to geometrically necessary dislocations generated by the mismatch in coefficients of thermal expansion of the particle and matrix. In this work, these zones are explicitly accounted for in finite element simulations of multiple realizations of representative heterogeneous composite microstructures consisting of randomly distributed particles in a metal matrix. This modeling approach is used to capture the probabilistic response of the material which is linked to stochastic variations in the local microstructure of the material. The model is then used to explore the effects of particle size and volume fraction on the variability of the inelastic deformation response of heterogeneous MMCs. It is shown that the variance of the composite response increases as the particle size decreases and as the volume fraction of reinforcing particles increases. It is also shown that the amount of strain localization in the matrix increases as the particle size decreases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 79, November 2013, Pages 15-24
نویسندگان
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