To meet sustainable goals in various engineering sectors, we urgently need innovative design strategies. This work presents a nature-inspired generative design methodology to support innovation-driven sustainable engineering design. It allows designers to create unpredicted but valuable components that can be directly integrated by modern manufacturing methods such as additive manufacturing. In this approach, the design of components is redefined as a series of elemental design instructions and emergence mechanisms that react to the design environment to generate innovative designs. Inspired by plant growth and development from nature, a set of “Design Hormones” is proposed which influence “design growth and development” through analogues of biological mechanisms. The design grows and develops from the actions of the hormones and genes, which do not know anything about the emergent shape or form of the design, they simply respond to the environment. The hormones are encoded with genes in a design seed, and different designs can emerge from the same seed in response to different environments based on their influence on the seed. A practical algorithm is then presented to implement the emergence of design from a simple seed. A range of examples are tested to demonstrate the effectiveness of the proposed approach. This work contributes foundational nature-inspired generative design theory and processes to promote innovative design for manufacturing in a sustainable future towards the next industrial revolution.
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