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6 results for “Cylindrical Shell”
Database of Static Buckling Experiments with Cylindrical Composite Shells under Axial Compression
<p>This document lists all freely available data on thin-walled axially loaded composite cylindrical shells. The list includes the material used, the laminate lay-up, the wall thickness, the radius, the length, the determined material parameters, the boundary conditions, the buckling load, the manufacturer and manufacturing process as well as the test rig used.</p> <p>If you have new test data you want to add in this database feel free to contact us via tobias.hartwich@tuhh.de or stefan.panek@tuhh.de</p>
Experimental studies on snaking in 3D-printed cylindrical shells under axial compression using photogrammetry
<p>The buckling instability of cylindrical shells under axial compression has been one of the most renowned problems in structural engineering for several decades. Many pioneering works in the 20<sup>th</sup> century have provided insights into understanding the shells' infamous imperfection sensitivity and led to reliability-based designs. However, a recent surge in numerical studies of the snaking phenomenon explores the development of a localised stable post-buckling mode in axially compressed cylindrical shells. Hitherto, none of the experimental studies report on the evolution of azimuthal snaking. In this work, experimental studies are carried out with the objective of revealing the snaking phenomenon. The axial compression experiments are performed on 3D-printed shells made of thermoplastic polyurethane (TPU). The work's novelty lies in the usage of TPU shells for slowing down the propagation of circumferential dimples and making it feasible to capture them using Photogrammetry. Despite the match between the experimental and numerical mode shapes, the experiments reveal multiple routes for the snaking sequence. Furthermore, mode transitions such as reduction in circumferential wave number and transformation of symmetric mode into an asymmetric one are observed. These experimental results provide insights into the localised phenomenon of snaking and validate numerical solutions.</p>
Randomly stacked open cylindrical shells as functional mechanical energy absorber
<p>Experimental and simulation data for the paper entitled <em>Randomly stacked open cylindrical shells as functional mechanical energy absorber. </em></p> <p>Download and unzip the AllFigureData.zip. </p> <p>Contact</p> <p>Experiments: sano@mech.keio.ac.jp</p> <p>Simulations: florence.bertails@inria.fr</p>
Experimental studies on snaking in 3D-printed cylindrical shells under axial compression using photogrammetry
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Data set for displacement-based multi-modal formulation of Koiter's method applied to cylindrical shells
<p>These results complement the results reported in the AIAA SciTech 2022 publication "Displacement-based multi-modal formulation of Koiter's method applied to cylindrical shells", presented in the Special Session in Honor of Prof. Dr. Johann Arbocz.</p> <p>A preprint of is already available as:</p> <blockquote> <p>Castro SGP, Jansen E. Displacement-based multi-modal formulation of Koiter's method applied to cylindrical shells. EngrXiv Preprints, 2021. <a href="https://doi.org/10.31224/osf.io/92xvf">doi:10.31224/osf.io/92xvf</a>.</p> </blockquote> <p>The results are generated using the bfsccylinder module version 0.3.12, see file <a href="https://zenodo.org/record/5667978/files/bfsccylinder-0.3.12.zip">bfsccylinder-0.3.12.zip</a>, also available in PyPi (<a href="https://pypi.org/project/bfsccylinder/">https://pypi.org/project/bfsccylinder/</a>). The composites module is also needed, see file <a href="https://zenodo.org/record/5667978/files/composites-0.4.18.zip">composites-0.4.18.zip</a>, also available in PyPi (<a href="https://pypi.org/project/composites/">https://pypi.org/project/composites/</a>).</p> <p> </p> <p><strong>Main analysis scripts:</strong></p> <p><a href="https://zenodo.org/record/5667978/files/koiter_cylinder_von_Karman.py?download=1">koiter_cylinder_von_Karman.py</a> has the analysis function using Donnell-type or Von Kárman-type shell kinematics.</p> <p><a href="https://zenodo.org/record/5667978/files/koiter_cylinder_Sanders.py">koiter_cylinder_Sanders.py</a> has the analysis function using Sanders-type shell kinematics.</p> <p> </p> <p><strong>Verification case: Water's composite cylindrical shell</strong></p> <p><a href="https://zenodo.org/record/5667978/files/v00_DIANA_Waters_shell.zip">v00_DIANA_Waters_shell.zip</a> reference results obtained with a converged model using DIANA Q40L elements</p> <p><a href="https://zenodo.org/record/5667978/files/v00_Waters_composite_cylindrical_shell_sanders.py">v00_Waters_composite_cylindrical_shell_sanders.py</a> script to run the verification case</p> <p><a href="https://zenodo.org/record/5667978/files/v00_Waters_composite_cylindrical_shell_sanders.results">v00_Waters_composite_cylindrical_shell_sanders.result</a> results saved in an object file saved using Pickle, can be loaded with `pickle.load()`</p> <p><a href="https://zenodo.org/record/5667978/files/v00_Waters_composite_cylindrical_shell_sanders_b_ijkl.txt">v00_Waters_composite_cylindrical_shell_sanders_b_ijkl.txt</a> b_ijkl coefficients for this case, with 10 modes in the Koiter expansion</p> <p><a href="https://zenodo.org/record/5667978/files/v00_Waters_composite_cylindrical_shell_sanders_output.txt">v00_Waters_composite_cylindrical_shell_sanders_output.txt</a> printed output</p> <p> </p> <p> </p> <p> </p>
Graduated Cylindrical Shell fitting results for multiple CMEs from multiple catalogs
<p>Graduated Cylindrical Shell fitting results for multiple CMEs from multiple catalogs</p>
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