How Geometry Controls the Tearing of Adhesive Thin Films on Curved Surfaces

Details How Geometry Controls the Tearing of Adhesive Thin Films on Curved Surfaces How Geometry Controls the Tearing of Adhesive Thin Films on Curved Surfaces

2011-06-27

arxiv.org/abs/1106.5366v2

Phys. Rev. Lett. 107, 164303 (2011)

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.107.164303

Flaps can be detached from a thin film glued on a solid substrate by tearing and peeling. For flat substrates, it has been shown that these flaps spontaneously narrow and collapse in pointy triangular shapes. Here we show that various shapes, triangular, elliptic, acuminate or spatulate, can be observed for the tears by adjusting the curvature of the substrate. From combined experiments and theoretical models, we show that the flap morphology is governed by simple geometric rules.

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