Kirigami Meta-Sheet for Enhanced Impact Absorption

Dahyun Joo; Yasuhiro Miyazawa; Seokhyeon Hong; Dongha Lee; Jinkyu Yang; Do-Nyun Kim

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arXiv · 2609.08362

Kirigami Meta-Sheet for Enhanced Impact Absorption

Dahyun Joo·Yasuhiro Miyazawa·Seokhyeon Hong·Dongha Lee·Jinkyu Yang·Do-Nyun Kim

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Abstract

Impact absorbers based on mechanical metamaterials often use bulky, vertically stacked architectures, limiting large area deployment and scalable manufacturing. Here, we propose a kirigami meta-sheet as a planar absorber that uses transitions between positive and negative stiffness regimes rather than sacrificial crushing. Guided by an analysis of a simple mass-spring-damper model, we program the stiffness of kirigami meta-sheets through the hinge ratio connecting the unit cells. Quasistatic indentation experiments confirm that the meta-sheet with a low hinge ratio most clearly exhibits the negative stiffness transition. The drop-tower tests show that it reduces rebound, decreases the first impact force, and increases dissipation. Unlike polyethylene mesh and styrofoam, this kirigami meta-sheet is shown to be effective in protecting a falling egg. Its planar geometry enables area scaling by tiling and is compatible with sheet level manufacturing routes such as cutting, molding, and lamination, establishing kirigami meta-sheets as practical impact absorbers.

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Dahyun Joo, Yasuhiro Miyazawa, Seokhyeon Hong, Dongha Lee, Jinkyu Yang, Do-Nyun Kim. 2026-09-08. Kirigami Meta-Sheet for Enhanced Impact Absorption. https://arxiv.org/abs/2609.08362

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