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Methodology for Designing Bio-Like Structures with Diverse Geometry and Hierarchical Topologies
Abstract
Biomimetic research has established that the key to the remarkable composite materials found in nature lies in a unique combination of constituent properties and hierarchical structural design. However, these design concepts have not been readily adapted to synthetic materials, because it is still unclear how to apply biolike principles to practical engineering applications. There is a need for a robust methodology that is capable of generating biomimetic structures with complex geometry and multiscale hierarchy, while accounting for application specific design criteria. The purpose of this work is to demonstrate a novel bio-like design methodology that meets these objectives. The approach is based on a bio-inspired pattern generation algorithm, the Gray-Scott model, which employs reactiondiffusion kinetics typically used to study morphogenesis. From a geometric perspective, the model is capable of producing a wide array of bio-like patterns such as spots, stripes, coral, and lace by controlling the reaction rates. For the first time, using this approach, we demonstrate the ability to produce hierarchical microstructures by controlling length scales using variable diffusion coefficients. The bio-like microstructures generated with this new approach complement recent advances in additive manufacturing that make fabrication of such novel structures feasible for the first time. This design paradigm permits the development of custom bio-like structures, thereby dramatically expanding the options for bio-inspired design of engineering materials.
DOI
10.12783/asc35/34922
10.12783/asc35/34922