Oblique wrinkles

TL;DR

This paper provides a theoretical analysis showing that oblique wrinkles can form on soft solids under extreme deformation at smaller strains than normal wrinkles, but they are unlikely to be observed experimentally.

Contribution

It introduces a theoretical framework explaining the formation of oblique wrinkles and predicts their occurrence at lower strains than traditional wrinkles, while also discussing their experimental unobservability.

Findings

Oblique wrinkles form at smaller strains than normal wrinkles.

Oblique wrinkles are theoretically possible but unlikely to be observed in experiments.

Theoretical analysis explains the conditions for oblique wrinkle formation.

Abstract

We prove theoretically that when a soft solid is subjected to an extreme deformation, wrinkles can form on its surface at an angle that is oblique to a principal direction of stretch. These oblique wrinkles occur for a strain that is smaller than the one required to obtain wrinkles normal to the direction of greatest compression. We go on to explain why they will probably never be observed in real-world experiments.