کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7961536 1513930 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Generalized boundary conditions on representative volume elements and their use in determining the effective material properties
ترجمه فارسی عنوان
شرایط مرزی تعمیم یافته بر عناصر حجمی نماینده و استفاده از آنها در تعیین خواص مؤثر مواد
کلمات کلیدی
عنصر حجم نماینده، شرایط مرزی تعمیم یافته، شرایط مرزی تصادفی، بومی سازی، کشسان، پلاستیک
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی
By a more or less fine surface partitioning, the generalized BC allow for a smooth scaling between the extremal cases of homogeneous stress or homogeneous strain BC. Further, by an irregular surface partitioning, one can obtain stochastic BC with an elastic stiffness close to the periodic/antipodal BC, but with a higher resistance against localization. This has been demonstrated by examining a softening example material. A test of plausibility for a RVE is to apply it to a homogeneous microstructure. Then, the microscale material law should be conducted directly to the macroscale. In case of softening microscale materials, this test works only for homogeneous strain BC. For homogeneous stress- and periodic/antipodal BC, localization occurs, accompanied by a drastic deviation from the expected stress-strain curve. From the generalization, one can derive stochastic BC that combine the moderate elastic stiffness of periodic BC with the high resistance against localization of homogeneous strain BC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 79, November 2013, Pages 408-416
نویسندگان
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