Knots are not for naught: Design, properties, and topology of hierarchical intertwined microarchitected materials.

ABSTRACT: Lightweight and tough engineered materials are often designed with three-dimensional hierarchy and interconnected structural members whose junctions are detrimental to their performance because they serve as stress concentrations for damage accumulation and lower mechanical resilience. We introduce a previously unexplored class of architected materials, whose components are interwoven and contain no junctions, and incorporate micro-knots as building blocks within these hierarchical networks. Tensile experiments, which show close quantitative agreements with an analytical model for overhand knots, reveal that knot topology allows a new regime of deformation capable of shape retention, leading to a ~92% increase in absorbed energy and an up to ~107% increase in failure strain compared to wov

SUBMITTER: Moestopo WP 

PROVIDER: S-EPMC9995035 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature