Partially Covered Sandwich Core for Weight-Efficient Structural Stability
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Solution Overview
Problem
Existing sandwich components, particularly those used in aircraft, face challenges in achieving a balance between mechanical stability and weight reduction, often requiring full-surface cover layers that compromise weight efficiency.
Innovation Solution
A partially covered core design with selective fiber reinforcement, where only specific regions are coated with a first cover layer, allowing the core to be accessible and visible in uncoated areas, while maintaining mechanical stability through unidirectional or crossed fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If full-surface cover layers are used to ensure mechanical stability, then structural integrity is improved, but weight increases significantly
Solution Approach 1:
The patent applies cover layers selectively only in specific regions where mechanical stability is required, rather than covering the entire surface. This localized application maintains structural integrity in critical areas while reducing overall material usage and weight.
Solution Approach 2:
The core is divided into different regions: covered regions where mechanical support is needed and uncovered regions where weight reduction is prioritized. This segmentation allows differential application of cover layers based on local structural requirements.
2Strength
If complete cover layers are applied to maintain structural integrity, then mechanical strength is improved, but material usage increases
Solution Approach 1:
Cover layers are applied locally only where load-bearing requirements demand additional structural support, rather than uniformly across the entire component surface. This reduces material consumption while maintaining necessary strength.
Solution Approach 2:
Instead of applying complete cover layers across the entire surface, the patent uses partial coverage with fiber reinforcement only in regions where it provides necessary structural support, eliminating excessive material usage.
3Weight of stationary object
If selective regional coating is used to reduce weight, then weight savings are achieved, but mechanical stability may be compromised
Solution Approach 1:
The patent strategically places cover layers in specific regions where mechanical stability is most critical, using local quality enhancement to maintain overall structural integrity while achieving weight reduction in non-critical areas.
Solution Approach 2:
The selection of which regions to cover is determined in advance based on structural analysis, placing reinforcement exactly where needed before manufacturing, ensuring mechanical stability is maintained while minimizing material usage.
Data Source
AI summary
A sandwich component includes a core having two opposite flat sides and at least one first cover layer connected to the core, mechanically stabilizing the sandwich component and containing at least one fiber component containing fibers. At least one of the flat sides is coated with the first cover layer such that only a coating region of this side is covered by the first cover layer, so that an uncoated free region of this flat side remains, and this flat side is not coated with any further layers so that the core is accessible from an environment in the free region on this flat side. A method for producing a sandwich component includes providing the core, and coating at least one of the flat sides with the first cover layer such that the core remains accessible from the environment in the free region on this flat side.