کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10677680 1012372 2015 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Goal-oriented error estimation for beams on elastic foundation with double shear effect
ترجمه فارسی عنوان
برآورد خطا جهت گشتاور برای پرتوها بر پایه الاستیسیته با اثر دو برش
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی
In this paper, goal-oriented error estimation for Timoshenko beams on Pasternak foundation, which involves double shear effect, is performed. The constitutive relation error (CRE) estimation is used in finite element analysis (FEA) to acquire strict bounds on quantities of interest. Due to the coupling of the displacement field and the internal force field in the equilibrium equations of the beam, the prolongation condition for construction of the admissible internal force field, a pillar of the CRE estimation, is not directly applicable. To overcome this difficulty, an auxiliary approximate problem whose stress solution enables the CRE estimation to proceed is introduced. Thereafter, strict bounds of outputs for the beam are obtained by dual analysis to which a significant adjunct is the circumvention of shear locking in low-order finite element analysis. Numerical results are presented to validate the strict bounding properties for quantities of beams on elastic foundation and accurate estimation of displacement quantities that is impervious to shear locking.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Mathematical Modelling - Volume 39, Issue 16, 15 August 2015, Pages 4699-4714
نویسندگان
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