کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
513927 866674 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Relations among stiffness coefficients of hexahedral 8-noded finite elements: A simple and efficient way to reduce the integration time
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Relations among stiffness coefficients of hexahedral 8-noded finite elements: A simple and efficient way to reduce the integration time
چکیده انگلیسی

Computing coefficients in stiffness matrices of finite element analysis in computational mechanics is time consuming, especially in large non-linear dynamic problems involving large meshes. Thus, any improvement in computational procedures to reduce the integration CPU time is welcomed. In this work, we suggest a simple and efficient approach based on linear equations to describe the cross-relations among the element´s shape-functions derivatives to compute three coefficients of the nodal stiffness submatrix as a function of other coefficients previously computed. The coefficients can relate different degrees of freedom at a given node in the element. They are used to evaluate other coefficients inside the same nodal submatrix. Improvements ranging between 20% and 24% in CPU time are obtained when the approach is applied to three dimensional discretizations with eight-noded brick finite elements.


► A significant reduction of integration time is achieved.
► Relations among stiffness terms were encountered.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Finite Elements in Analysis and Design - Volume 55, August 2012, Pages 1–6
نویسندگان
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