Local Stress Analysis of Thin-Walled Structures by Hierarchical Finite Elements.

2000 ◽  
pp. 105-119 ◽  
Author(s):  
Masa HAYASHI ◽  
Chikara WATANABE ◽  
Michio SAITOH
Keyword(s):  
Finite Elements ◽  
Stress Analysis ◽  
Local Stress ◽  
Thin Walled Structures ◽  
Thin Walled ◽  
Hierarchical Finite Elements

scholarly journals Large deflection and post-buckling of thin-walled structures by finite elements with node-dependent kinematics

2020 ◽  
Author(s):  
E. Carrera ◽  
◽  
A. Pagani ◽  
R. Augello
Keyword(s):  
Finite Elements ◽  
Large Deflection ◽  
Nonlinear Problems ◽  
Structural Domain ◽  
Fe Model ◽  
Efficient Manner ◽  
Cross Sectional ◽  
Thin Walled Structures ◽  
Post Buckling ◽  
Thin Walled

AbstractIn the framework of finite elements (FEs) applications, this paper proposes the use of the node-dependent kinematics (NDK) concept to the large deflection and post-buckling analysis of thin-walled metallic one-dimensional (1D) structures. Thin-walled structures could easily exhibit local phenomena which would require refinement of the kinematics in parts of them. This fact is particularly true whenever these thin structures undergo large deflection and post-buckling. FEs with kinematics uniform in each node could prove inappropriate or computationally expensive to solve these locally dependent deformations. The concept of NDK allows kinematics to be independent in each element node; therefore, the theory of structures changes continuously over the structural domain. NDK has been successfully applied to solve linear problems by the authors in previous works. It is herein extended to analyze in a computationally efficient manner nonlinear problems of beam-like structures. The unified 1D FE model in the framework of the Carrera Unified Formulation (CUF) is referred to. CUF allows introducing, at the node level, any theory/kinematics for the evaluation of the cross-sectional deformations of the thin-walled beam. A total Lagrangian formulation along with full Green–Lagrange strains and 2nd Piola Kirchhoff stresses are used. The resulting geometrical nonlinear equations are solved with the Newton–Raphson linearization and the arc-length type constraint. Thin-walled metallic structures are analyzed, with symmetric and asymmetric C-sections, subjected to transverse and compression loadings. Results show how FE models with NDK behave as well as their convenience with respect to the classical FE analysis with the same kinematics for the whole nodes. In particular, zones which undergo remarkable deformations demand high-order theories of structures, whereas a lower-order theory can be employed if no local phenomena occur: this is easily accomplished by NDK analysis. Remarkable advantages are shown in the analysis of thin-walled structures with transverse stiffeners.

Comparisons between 1D (Beam) and 2D (Plate/Shell) Finite Elements to Analyze Thin Walled Structures

2014 ◽  
Vol 93 (1-2) ◽  
pp. 3-16 ◽  
Author(s):  
E. Carrera ◽  
M. Cinefra ◽  
M. Petrolo ◽  
E. Zappino
Keyword(s):  
Finite Elements ◽  
Thin Walled Structures ◽  
Thin Walled

Creep-Stress Analysis of Thin-Walled Structures

1960 ◽  
Vol 64 (599) ◽  
pp. 673-682 ◽  
Author(s):  
S. A. Patel ◽  
K. A. V. Pandalai ◽  
B. Venkatraman
Keyword(s):  
Stress Analysis ◽  
Elevated Temperatures ◽  
Early Stage ◽  
New Techniques ◽  
Creep Stress ◽  
Thin Walled Structures ◽  
Stage Of Development ◽  
Method Of Solution ◽  
Realistic View ◽  
Thin Walled

In the present era of supersonic and hypersonic flight, structural analysts are well aware of the new problems that arise from the exposure of aircraft and missile structures to elevated temperatures. The task of solving these problems is in its early stage of development. Since the problems are diversified in nature, a different method of solution has to be developed in each case. It is probable that in some cases radically new techniques may have to be devised. Until such time, the structural designer is forced to take a realistic view and use satisfactory extensions of existing methods of analysis.

scholarly journals Models and Finite Elements for Thin-Walled Structures

2004 ◽  
Author(s):  
M. Bischoff ◽  
K.-U. Bletzinger ◽  
W. A. Wall ◽  
E. Ramm
Keyword(s):  
Finite Elements ◽  
Thin Walled Structures ◽  
Thin Walled

scholarly journals Blade cutting of thin walled structures by explicit dynamics finite elements

Meccanica ◽  
2017 ◽  
Vol 53 (6) ◽  
pp. 1271-1289 ◽  
Author(s):  
Federica Confalonieri ◽  
Aldo Ghisi ◽  
Umberto Perego
Keyword(s):  
Finite Elements ◽  
Explicit Dynamics ◽  
Thin Walled Structures ◽  
Thin Walled ◽  
Blade Cutting

Educational Software for Stress Analysis of Idealized Thin Walled Open Sections

2013 ◽  
Vol 315 ◽  
pp. 339-343 ◽  
Author(s):  
Jaffar S. Mohamed Ali ◽  
Hasna Nur Fadhila ◽  
Nor Azhanadia Binti Aziz
Keyword(s):  
User Interface ◽  
Stress Analysis ◽  
Graphical User Interface ◽  
Cross Sections ◽  
Learning Process ◽  
Educational Software ◽  
Thin Walled Structures ◽  
Torsional Loads ◽  
Thin Walled ◽  
Teaching Learning

An educational software which can aid students in stress analysis of idealized thin-walled open sections has been developed. The software enables students to select different cross-sections which may be subjected to bending, shear or torsional loads and evaluate the stresses on it. Results obtained through this software have been validated. The software has been developed using MATLAB with graphical user interface (GUI). The software is expected to be a useful tool for effective teaching learning process of courses on thin-walled structures and aircraft structures.

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