Abstract
Crumpled-based materials are relatively easy to fabricate and show robust mechanical properties for practical applications, including meta-biomaterials design aimed for improved tissue regeneration. For such requests, however, the structure needs to be porous. We introduce a crumpled holey thin sheet as a robust bio-metamaterial and measure the mechanical response of a crumpled holey thin Mylar sheet as a function of the hole size and hole area fraction. We also study the formation of patterns of crease lines and ridges. The area fraction largely dominated the crumpling mechanism. We also show, the crumpling exponents slightly increases with increasing the hole area fraction and the total perimeter of the holes. Finally, hole edges were found to limit and guide the propagation of crease lines and ridges.
Highlights
Crumpling and folding of thin-wall objects are frequently encountered in nature, technology, and everyday life
Understanding the physics of crumpling in such controlled experiments could be helpful for designing crumpling-based metamaterials, where crumpled structures act as the building blocks
The effect of material properties on morphology and mechanical response of a crumpled thin sheet was studied in detail experimentally and has been shown that there is a strong link between the morphology and mechanical response of the crumpled structure[4]
Summary
Crumpling and folding of thin-wall objects are frequently encountered in nature, technology, and everyday life. For the first time, we investigate the effects of hole size and area fraction on the crumpling behavior of thin elastic sheets in order to design bio-metamaterials. The distribution of the ridges and crease lines in both holey and non-holey crumpled sheets was measured by scanning and image analyzing the unfolded crumpled specimens.
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