کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6704766 1428522 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Micropolar modeling approach for periodic sandwich beams
ترجمه فارسی عنوان
رویکرد مدل سازی میکروپولر برای پرتوهای ساندویچ دوره ای
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
A micropolar Timoshenko beam formulation is developed and used to model web-core sandwich beams. The beam theory is derived by a vector approach and the general solution to the governing sixth-order equations is given. A nodally-exact micropolar Timoshenko beam finite element is derived using the solution. Bending and shear stiffness coefficients for a web-core sandwich beam are determined through unit cell analysis, where the split of the shear forces into symmetric and antisymmetric parts plays a pivotal role. Static bending of web-core beams is studied using the micropolar model as well as modified couple-stress and classical Timoshenko beam models. The micropolar 1-D results are in best agreement with 2-D web-core beam frame results. This is because the micropolar beam allows antisymmetric shear deformation to emerge at locations where the 2-D web-core deformations cannot be reduced to 1-D by considering only symmetric shear behavior.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 185, 1 February 2018, Pages 656-664
نویسندگان
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