What exactly happens inside a crumpled sheet? New simulations, taking into account that the sheet can't pass through itself, reveal that crumpled sheets are more rigid than one might have guessed.
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Didonna, B. A look inside the creases. Nature Mater 5, 167–168 (2006). https://doi.org/10.1038/nmat1599
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DOI: https://doi.org/10.1038/nmat1599
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