Investigating the role of geometry on the adhesive strength of mussel inspired structures*

This study investigates the mechanical origins of the adhesive strength of marine mussel plaque/thread structures via synthetic mimics. We aim to develop a deeper, predictive understanding of how the geometry and material properties of the plaque impact structural deformation, interfacial energy dissipation, and ultimately, adhesion. Using custom-designed 3D printed molds, we can quickly manufacture and test a wide range of bio-inspired shapes and geometries. Experimentally, we measure the pull off forces as a function of geometric parameters at a range of loading angles, while the resulting structural deformation and the different failure modes are observed, thereby providing insight into how stresses are dissipated and concentrated throughout the structure. We anticipate that these studies will lead to an improved understanding of how the geometric design of soft structures can be used to control their adhesion, enabling the development of bioinspired adhesives with superior capabilities for applications in biomedical, aerospace, and structural engineering.