3D Meta-Structure Modeling for Lightweight Load-Bearing Components
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Solution Overview
Problem
Current additive manufacturing technologies and design methods for mechanical systems lack optimized designs that balance strength and weight, particularly in load-bearing components, where non-strength contributing elements are difficult to remove effectively.
Innovation Solution
The development of three-dimensional meta-structure models, referred to as 'Meshagons,' which are generated using finite element mesh structures with varying cross-sectional areas and interlinking linkages, allowing for the creation of ultra-light, high-strength components with programmable connectivity and porosity, suitable for production via additive manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional additive manufacturing is used to manufacture load-bearing components, then the components can be produced with standard structural designs, but the components will have excessive weight and non-strength contributing elements that cannot be effectively removed
Solution Approach 1:
The patent segments the component into a hierarchical meta-structure consisting of multiple levels of tetrahedral elements (ML-1, ML-2, ML-3). Each level divides the structure into smaller discrete elements that can be independently optimized. This segmentation allows removal of non-essential material while maintaining structural integrity through the distributed hierarchical network of elements.
Solution Approach 2:
The patent applies local quality by varying the density and distribution of meta-structural elements at different locations within the component. The hierarchical tetrahedral structure allows different regions to have optimized element densities and configurations based on local stress requirements, enabling weight reduction in low-stress areas while maintaining strength in critical regions.
2Adaptability or versatility
If finite element mesh structures are converted to three-dimensional meta-structure models with varying cross-sectional areas, then the structural properties can be optimized for specific applications, but the manufacturing complexity and model generation time increase
Solution Approach 1:
The patent implements nested doll by creating a hierarchical structure where ML-2 elements are nested within ML-1 elements, and ML-3 elements are nested within ML-2 elements. This nested hierarchical organization allows complex structural properties to be controlled through systematic refinement of nested levels, making the complexity manageable through recursive patterns rather than random complexity.
Solution Approach 2:
The patent uses parameter changes by systematically varying geometric parameters (cross-sectional areas, element densities, hierarchical levels) to optimize structural properties. The meta-structure model allows continuous adjustment of parameters such as element size, distribution, and hierarchical depth to tailor structural properties for specific applications while maintaining a consistent generative framework.
3Weight of moving object
If non-strength contributing elements are removed from mechanical systems, then the weight is reduced, but the strength and structural integrity may be compromised
Solution Approach 1:
The patent applies preliminary action by performing comprehensive finite element analysis and structural optimization before the additive manufacturing process. The hierarchical meta-structure is designed and validated in silico with optimized element distributions and configurations that guarantee structural integrity. This preliminary computational design ensures that material is removed only from non-critical regions while maintaining strength requirements, eliminating the need for post-manufacturing structural verification.
Solution Approach 2:
The patent implements feedback through iterative finite element analysis that evaluates the structural performance of the hierarchical meta-structure during the design phase. The analysis provides feedback on stress distributions and structural integrity, which is used to refine the meta-structure configuration before manufacturing. This closed-loop design process ensures weight optimization does not compromise reliability.
Data Source
AI summary
The exemplified methods and systems facilitate manufacturing of a new class of mechanical, loading-bearing components having optimized stress/strain three-dimensional meta-structure structures (also referred to herein as “Meshagons”) as finite-element-based 3D volumetric mesh structures. The resulting three-dimensional meta-structure structures provide high strength, ultra-light connectivity, with programmable interlinkage properties (e.g., density/porosity of linkages).