Experimental and numerical analyses of a thin cylindrical shell model

The analysis of thin shell structures is generally based on theoretical principles. The experimental tests on this type of structure are important for understanding the effect of loading and the geometrical shapes on its mechanical behavior. In this paper, an experimental test of a cylindrical shell under the effect of concentrated static loads is presented. A comparative numerical study is carried out by using two finite elements: the first element called ACM_RSBE5, recently formulated, and the second one, S4R, of ABAQUS code are used for the study of thin shells. The experimental results are compared with those obtained numerically. The results of both elements, ACM-RSBE5 and S4R, are in agreement with those obtained experimentally. The efficiency and the importance of the approach of the flat shell element for thin shell structures are confirmed

Efficiency of the Strain Based Approach Formulation for Plate Bending Analysis

In recent years many finite elements have been developed for plate bending analysis. The formulated elements are based on the strain based approach. This approach leads to the representation of the displacements by higher order polynomial terms without the need for the introduction of additional internal and unnecessary degrees of freedom. Good convergence can also be obtained when the results are compared with those obtained from the corresponding displacement based elements, having the same total number of degrees of freedom. Furthermore, the plate bending elements are free from any shear locking since they converge to the Kirchhoff solution for thin plates contrarily for the corresponding displacement based elements. In this paper the efficiency of the strain based approach compared to well known displacement formulation is presented. The results obtained by a new formulated plate bending element based on the strain approach and Kirchhoff theory are compared with some others elements. The good convergence of the new formulated element is confirmed

A Comparative Study between Displacement and Strain Based Formulated Finite Elements Applied to the Analysis of Thin Shell Structures

The analysis and design of thin shell structures is a topic of interest in a variety of engineering applications. In structural mechanics problems the analyst seeks to determine the distribution of stresses throughout the structure to be designed. It is also necessary to calculate the displacements of certain points of the structure to ensure that specified allowable values are not exceeded. In this paper a comparative study between displacement and strain based finite elements applied to the analysis of some thin shell structures is presented. The results obtained from some examples show the efficiency and the performance of the strain based approach compared to the well known displacement formulation

Efficiency of the Strain Based Approach Formulation for Plate Bending Analysis

In recent years many finite elements have been developed for plate bending analysis. The formulated elements are based on the strain based approach. This approach leads to the representation of the displacements by higher order polynomial terms without the need for the introduction of additional internal and unnecessary degrees of freedom. Good convergence can also be obtained when the results are compared with those obtained from the corresponding displacement based elements, having the same total number of degrees of freedom. Furthermore, the plate bending elements are free from any shear locking since they converge to the Kirchhoff solution for thin plates contrarily for the corresponding displacement based elements. In this paper the efficiency of the strain based approach compared to well known displacement formulation is presented. The results obtained by a new formulated plate bending element based on the strain approach and Kirchhoff theory are compared with some others elements. The good convergence of the new formulated element is confirmed

A Comparative Study between Displacement and Strain Based Formulated Finite Elements Applied to the Analysis of Thin Shell Structures

The analysis and design of thin shell structures is a topic of interest in a variety of engineering applications. In structural mechanics problems the analyst seeks to determine the distribution of stresses throughout the structure to be designed. It is also necessary to calculate the displacements of certain points of the structure to ensure that specified allowable values are not exceeded. In this paper a comparative study between displacement and strain based finite elements applied to the analysis of some thin shell structures is presented. The results obtained from some examples show the efficiency and the performance of the strain based approach compared to the well known displacement formulation

Contribution to the Modeling of Structures with Complex Geometries with and without Stiffeners

En pratique, L’analyse des structures complexes tel que les coques minces ; où l’ouvrage couvrant une grande surface avec une géométrie très complexes et parfois supportant des charges importantes. Ces derniers risques de provoquer des grands déplacements ce qui nécessite l’ajout des raidisseurs pour augmenter la rigidité et minimiser les déformations. Ces structures complexes peuvent être analysées par modélisation par la méthode des éléments finis. En général, les joints ou les connexions entre les raidisseurs et les structures de coque sont difficiles à modéliser. Les tâches proposées pour résoudre ce problème sont la modélisation appropriée des structures de coques rigides ainsi que la validation à l'aide des éprouvettes représentatifs testés expérimentalement. Dans cette thèse, plusieurs études expérimentales et numériques concernant le comportement d'un modèle de coque cylindrique sont menées. Le comportement des modèles de coque cylindrique sous une charge concentrée, avec et sans raidisseurs et poutre en bord est étudié. La modélisation numérique à l'aide d'un élément de coque plat développé récemment et deux éléments ABAQUS sont utilisés. Les résultats obtenus expérimentalement et numériquement sont comparés et commenté

Efficiency of the Strain Based Approach Formulation for Plate Bending Analysis

In recent years many finite elements have been developed for plate bending analysis. The formulated elements are based on the strain based approach. This approach leads to the representation of the displacements by higher order polynomial terms without the need for the introduction of additional internal and unnecessary degrees of freedom. Good convergence can also be obtained when the results are compared with those obtained from the corresponding displacement based elements, having the same total number of degrees of freedom. Furthermore, the plate bending elements are free from any shear locking since they converge to the Kirchhoff solution for thin plates contrarily for the corresponding displacement based elements. In this paper the efficiency of the strain based approach compared to well known displacement formulation is presented. The results obtained by a new formulated plate bending element based on the strain approach and Kirchhoff theory are compared with some others elements. The good convergence of the new formulated element is confirmed

A Comparative Study between Displacement and Strain Based Formulated Finite Elements Applied to the Analysis of Thin Shell Structures

The analysis and design of thin shell structures is a topic of interest in a variety of engineering applications. In structural mechanics problems the analyst seeks to determine the distribution of stresses throughout the structure to be designed. It is also necessary to calculate the displacements of certain points of the structure to ensure that specified allowable values are not exceeded. In this paper a comparative study between displacement and strain based finite elements applied to the analysis of some thin shell structures is presented. The results obtained from some examples show the efficiency and the performance of the strain based approach compared to the well known displacement formulation

A Comparative Study between Displacement and Strain Based Formulated Finite Elements Applied to the Analysis of Thin Shell Structures

The analysis and design of thin shell structures is a topic of interest in a variety of engineering applications. In structural mechanics problems the analyst seeks to determine the distribution of stresses throughout the structure to be designed. It is also necessary to calculate the displacements of certain points of the structure to ensure that specified allowable values are not exceeded. In this paper a comparative study between displacement and strain based finite elements applied to the analysis of some thin shell structures is presented. The results obtained from some examples show the efficiency and the performance of the strain based approach compared to the well known displacement formulation