Experimental studies on snaking in 3D-printed cylindrical shells under axial compression using photogrammetry
Data files
Jan 19, 2024 version files 463.01 MB
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Numerical_study_data.rar
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Photogrammetry_Route_A_Experiment_data.rar
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README.md
Abstract
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 20th 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.
README
This README file was generated on 18/01/2024 by G Raju.
GENERAL INFORMATION
Title of Dataset: Experimental studies on snaking in 3D-printed cylindrical shells under axial compression using photogrammetry
Author Information
A. Principal Investigator Contact Information
Name: G Raju
Institution: Indian Institute of Technology, Hyderabad
Address: India
Email: gangadharanr@mae.iith.ac.in
B. Associate or Co-investigator Contact Information
Name: V Ravulapalli
Institution: Indian Institute of Technology, Hyderabad
Address: India
Email: me20resch13005@iith.ac.inDate of data collection: March-December 2023
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SHARING/ACCESS INFORMATION
Recommended citation for this dataset: Raju, Gangadharan; Ravulapalli, Vineeth; Narayanamurthy, Vijayabaskar (2024). Experimental studies on snaking in 3D-printed cylindrical shells under axial compression using photogrammetry. Dryad Digital Repository. https://doi.org/10.5061/dryad.pk0p2ngw8
Links to other publicly accessible locations of the data: None
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SUMMARY OF DATASET CONTENTS:
Using the contents of the dataset the Finite element simulation results and the experimental buckling response of the shell can be reproduced.
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DESCRIPTION OF THE DATA AND FILE STRUCUTRE
The dataset consists of Zipped folders, which can be extracted using software like WinZip or WinRAR.
The folder "Photogrammetry_Route_A_Experiment_data" contains the MATLAB figures used to present the dimples' propagation in section 4.2.2.1. (Route A) of the paper. Their corresponding point clouds are provided as '.xyz' files. The '.Zip' files contain the pictures required to obtain these point clouds using the procedure described in the paper. The Excel spreadsheet contains the axial load-displacement response acquired from a load cell.
The folder "Numerical study_data" contains the input file for generating the Odd Snaking results presented in section 2.2. The videos of all the presented finite element results are provided as '.avi' files.
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DATA-SPECIFIC INFORMATION
(A) Details of Photogrammetry_Route_A_Experiment_data.zip folder:
The following files can be extracted by unzipping the folder:
Data type: MATLAB Figure
File list:
a. Route_A_1
b. Route_A_2
c. Route_A_3
d. Route_A_4
e. Route_A_5Description: The MATLAB software can access these figures and their contents. The figures can be used to reproduce the dimples' propagation results presented in section 4.2.2.1.(Route A) of the paper.
Data type: '.xyz'
File list:
a. Route_A_1.xyz
b. Route_A_2.xyz
c. Route_A_3.xyz
d. Route_A_4.xyz
e. Route_A_5.xyzDescription: The '.xyz' files consist of the point clouds acquired using Photogrammetry as described in the paper. These files can be read using software like NOTEPAD, Microsoft Word, Microsoft Excel, or equivalent tools. Each row of a '.xyz' file represents rectangular coordinates of a buckled shell's geometry, separated by blank spaces. These files can be used to generate the provided MATLAB figures.
Data type: WinZIP folders
File list:
a. Route_A_1_pics
b. Route_A_2_pics
c. Route_A_3_pics
d. Route_A_4_pics
e. Route_A_5_picsDescription: Each Zipped folder contains the JPG format pictures required to obtain these point clouds using the procedure described in section 4.1.2 of the paper.
Data type: Microsoft Excel Worksheet
File Name: Route_A_load-dispDescription: The Worksheet consists of the experimentally acquired axial load-displacement response of the shell, presented in Figure 9 of the paper.
(B) Details of Numerical_study_data.zip folder:
The following files can be extracted by unzipping the folder:
Data type: Input file ('.inp')
File Name: Odd_snaking_input_fileDescription: By importing this input file into ABAQUS software, the buckling response of a single dimpled shell can be acquired, and the Odd Snaking results presented in section 2.2 can be reproduced.
Data type: '.avi'
File list:
a. Even_snaking
b. Odd_snaking
c. Measured_geom_ImperfectionDescription: These '.avi' video files animate the finite element results presented in the paper.
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LIST OF REQUIRED SOFTWARE
- MATLAB
- Microsoft Excel
- NOTEPAD/Microsoft Word
- ABAQUS
- Meshroom
- Meshlab
- Netfabb (for scaling the geometry)
Methods
The dataset of Numerical results of buckling of 3D printed shells was generated using ABAQUS, a Finite element software.
The dataset of Experimental results of buckling of 3D printed shells consists of load-displacement response under compression. In addition, the post-buckling mode shapes of the shell acquired using Photogrammetry were also uploaded.