کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6915932 | 862926 | 2016 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Elimination of self-straining in isogeometric formulations of curved Timoshenko beams in curvilinear coordinates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Elimination of self-straining in isogeometric formulations of curved Timoshenko beams in curvilinear coordinates Elimination of self-straining in isogeometric formulations of curved Timoshenko beams in curvilinear coordinates](/preview/png/6915932.png)
چکیده انگلیسی
Isogeometric formulations of curved Timoshenko beams in curvilinear coordinates often result in self-straining of membrane and shear strains, due to the discretization of the local displacement field. Self-straining means a failure in exact representation of rigid body motions, which consequently deteriorates response quality. To overcome the difficulty of self-straining, we propose an invariant formulation that discretizes the global displacement field. It turns out that the approximated membrane, shear, and bending strain measures are invariant regardless of initial geometry in the proposed formulation. For effective applications to any arbitrarily curved structures and locking-free formulations to alleviate membrane and shear locking, the proposed invariant formulation is combined with selective reduced integration (SRI) and BÌ projection method. Numerical examples demonstrate the effectiveness and applicability of the proposed invariant formulation, which gives much more accurate results together with both SRI and BÌ projection method, in comparison to the existing isogeometric formulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 309, 1 September 2016, Pages 680-692
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 309, 1 September 2016, Pages 680-692
نویسندگان
Myung-Jin Choi, Seonho Cho,