Orthotropic Foam Microstructure Layout for Variable Elasticity
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Solution Overview
Problem
Current additive manufacturing techniques struggle to produce objects with orthotropic elastic properties, where elasticity can vary by direction, due to technology-dependent constraints and the generation of voluminous computer objects that are difficult to manage with existing machines.
Innovation Solution
A data processing device and method for manufacturing orthotropic foams, which calculates branch grain locations and determines manufacturing data to create objects with varying elasticity by weighting distances between branch grains based on deformation data, allowing for the production of objects with different rigidity in different directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additive manufacturing is used to produce objects with orthotropic elastic properties, then the ability to create variable elasticity structures is improved, but the technology-dependent manufacturing constraints and voluminous data generation worsen the ease of manufacture
Solution Approach 1:
The patent segments the continuous microstructure into discrete Voronoi cells with specific topological configurations. By dividing the foam structure into manageable cellular units with defined grain orientations and connectivity, the complex orthotropic elasticity requirement is broken down into controllable discrete elements that can be manufactured using additive manufacturing constraints
Solution Approach 2:
The patent applies local quality by assigning different Voronoi cell configurations, grain orientations, and connectivity patterns to different regions of the foam structure. This allows the elasticity to be modulated locally in specific directions while maintaining manufacturability, as each local region can be optimized independently according to the required orthotropic properties
2Ease of manufacture
If conventional isotropic Voronoi foams are used, then ease of manufacture is improved, but the ability to produce direction-dependent elasticity worsens
Solution Approach 1:
The patent introduces asymmetry by creating Voronoi cells with non-uniform grain orientations and anisotropic connectivity patterns. Instead of isotropic random structures, the grains are deliberately oriented in specific directions with controlled connectivity, creating asymmetric structures that exhibit different elastic properties in different directions while remaining manufacturable
3Manufacturing precision
If detailed microstructure data is generated for orthotropic foams, then manufacturing precision is improved, but data storage complexity and volume worsen
Solution Approach 1:
The patent applies preliminary action by pre-defining a limited set of Voronoi cell templates with specific topological configurations and grain orientation patterns. These pre-characterized cells are stored in a database with their elastic properties pre-calculated, allowing the complex microstructure generation to be replaced by selecting and assembling predefined templates, thus reducing data storage requirements while maintaining manufacturing precision
Data Source
AI summary
The invention relates to a device designed to determine manufacturing data for producing objects that have variable, freely orientable orthotropic elasticity characteristics, by calculating data relating to grains of branches, which combined define branches, the number of grains of branches and the thickness of each branch being related to the desired elasticity characteristics.