ISSN: 1999-8716

Keywords : finite element model


FROM A HORIZONTAL CYLINDER EMBEDDED IN A POROUS MEDIA

Ahmed Hassen Ahmed; Eklas Edan Kader; Hatam Abd Hassan; Abdulrakib Abdulwahab Masad Al-Wahbi; Omer Hazem Karofa; Manar Salih Mahdi; Safa Hussain Abid Awn; Osama Y. AL-Rawi; Ali H. Aziz; Saad Qassim Fleh; Ali Laftah Abbas

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2011, Volume 4, Issue 1, Pages 1-19

ABSTRACT:- Theoretical and experimental study of heat transfer steady natural convection from the cylinder embedded in a saturated porous media was cared out. the theoretical part of the work includes the derivation of the governing momentum and energy equation by using Darcy flow model. The two equations are solved by finite difference method with constant cylinder surface temperature, with a Peclet number under steady condition and Rayleigh number ranged between (10

Keywords

natural convection
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porous media
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horizontal cylinder
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الحمل الطبيعي
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الوسط المسامي
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اسطوانة أفقية.

ELASTIC- PLASTIC ANALYSIS FOR SQUARE SHELL TUBES DURING PURE BENDING USING FINITE ELEMENT

Eklas Edan Kader

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2011, Volume 4, Issue 1, Pages 12-29

ABSTRACT :- An analytical model with sufficiently non linear kinematics to capture the development in engineering applications to resist bending stress for thin walled elastic-plastic steel tubes which used as structural members. The results indicate that collapse of such tubes is imperfection sensitive for tubes with height to thickness ratio (h/t), but the sensitivity decreases as the ratio decreases. Experimentally, the tubes collapse due a limit moment instability which is followed by the formation of a kink on the compression flange of the tubes. The present research removes the limitation in the pre- bifurcation analysis and concentrates on the numerical prediction ANSYS -11 program of the response with stress and strain distribution on thin walled tubes of square cross section. The numerical, analytical and experimental results are converges to each other, by simulating the response of square tubes subjected to static and dynamic axial bending loading .The finite element models used for this work are featured by the geo-metric and material characteristics of square tubes and comparison of the computed bending response to the results and findings of the experimental works shows that the finite element models described here, approached the actual bending response of the square tubes to a satisfactory degree both in terms of collapse modes and main bending characteristics such as bending stress and strain and deformation displacement.
Keywords:- Finite element model, square shell, bending.