README – Research Data (last modified 22 October 2025 by Ted O'Hare)

This repository contains the supporting research data associated with the article:

'An implicit hyperelastoplastic micropolar material point method for shear bands and size effects at finite strains'
Authors: Ted O'Hare, William Coombs, Panos Gourgiotis and Charles Augarde
Journal: Computer Methods in Applied Mechanics and Engineering
DOI: https://doi.org/10.1016/j.cma.2025.118516

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Contents

1. Excel file (Figures_Data.xlsx)
   - Each worksheet corresponds to one figure from the paper.
   - The worksheet names match the figure numbers (Fig5, Fig8, etc.).
   - Each sheet contains the raw or post-processed numerical data plotted in the respective figure.
   - Axes labels, units, and legends are consistent with those used in the paper.

2. VTK files (.vtk)
   - Separate folders are provided for each figure containing visualisation data.
   - Filenames match the corresponding sub-figures (e.g. Fig6a.vtk).
   - These files allow direct visualisation of the computational results in standard tools such as ParaView or VisIt.

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File Structure

/Data
  ├── Figures_Data.xlsx
  ├── Fig6/
  │     ├── Fig6a.vtk
  │     ├── ...
  ├── Fig7/
  │     ├── Fig7a.vtk
  │     ├── Fig7c.vtk
  ├── Fig10/
  │     ├── Fig10a.vtk
  │     ├── ...
  ├── Fig13/
  │     ├── Fig13a.vtk
  │     ├── Fig13c.vtk
  ├── Fig15/
        ├── Fig15b.vtk
        ├── Fig15c.vtk

Note: Figure 7b is not supplied because it is identical to the data shown in Figure 6f. Figures 12, 13b, and 15a are not supplied because they are identical to the data shown in Figure 10b.

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Usage

- Excel data: Open Figures_Data.xlsx in any spreadsheet software. Each sheet contains the numerical values plotted in the corresponding figure of the paper.
- VTK files: Open the .vtk files in ParaView, VisIt, or another compatible visualisation tool to reproduce the figure images and explore the results interactively.

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Notes

- The data are provided exactly as used in the preparation of the figures; no further processing is required.
- Units are SI unless otherwise stated.
- Minor variations in visual appearance may occur depending on the visualisation software and settings.

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Funding

This research was supported by the UKRI Engineering and Physical Sciences Research Council (EPSRC) [grant number EP/T518001/1].

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Licence

Access to this dataset is provided under a Creative Commons Attribution 4.0 International (CC BY) licence.
https://creativecommons.org/licenses/by/4.0/

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Code

The MATLAB code developed and used in this study is freely available on GitHub under an MIT licence:
https://github.com/TedOHare/Micropolar-MPM

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Citation

If you use this data, please cite the associated publication:

O'Hare, T. J., Coombs, W. M., Gourgiotis, P. A. & Augarde, C. E. (2026). An implicit hyperelastoplastic micropolar material point method for shear bands and size effects at finite strains. Computer Methods in Applied Mechanics and Engineering, 448, 118516.

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Contact

For any questions regarding this dataset, please contact the corresponding author:  
Professor Will Coombs – w.m.coombs@durham.ac.uk
