|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Biological Materials Science
||Bioinspired Self-strengthening Tape Junctions
||Benjamin Skopic, Hannes Schniepp
|On-Site Speaker (Planned)
Fibers are a fundamental building block for many natural materials because of their high tensile strength and, when paired with an adhesive matrix, importance in composites and metamaterials. Fibers are traditionally cylindrical; however, a tape morphology offers significant performance enhancements. For example, the recluse spider spins a 50 nm-thin silk fiber with a high aspect ratio that acts as a microscopic sticky tape without any adhesive coating. The spider makes adhesive junctions of this tape supporting loads corresponding to 400 MPa, enhancing its web’s toughness via looped metastructures. Here we investigate the mechanisms enabling these impressive junctions and develop a model describing its failure mechanics. We show that these junctions self-strengthen to absorb impressively high forces under certain geometric conditions, reaching the tensile strength or lap shear strength of the tape itself.
||Biomaterials, Mechanical Properties,