Compression-Molded Composite Sandwich Core With Cavities
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Solution Overview
Problem
Compression-molded composite components with sandwich structures face limitations in design freedom and increased weight and cost due to the need for thicker cores to enhance load-bearing capacity, which also reduces available space.
Innovation Solution
A compression-molded composite component with integral strengthening structures formed by press molding, featuring a core with cavities and fiber-reinforced thermoplastic outer layers, providing strength without additional supports, thus maintaining thinness and design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the core is increased to enhance load-bearing capacity, then the strength and stiffness of the composite component are improved, but the available space is reduced and the weight increases
Solution Approach 1:
The core is segmented into a cellular structure with multiple cavities rather than a solid mass. This segmentation provides sufficient load-bearing capacity through the distributed cellular framework while maintaining lower weight and preserving more available space compared to a solid core of equivalent strength.
Solution Approach 2:
The core utilizes a porous cellular structure with controlled voids and cavities. This porous configuration delivers the necessary mechanical strength and stiffness while significantly reducing the material density and overall weight, thereby preserving available space without compromising load-bearing capacity.
2Strength
If the thickness of the core is increased to enhance load-bearing capacity, then the strength and stiffness of the composite component are improved, but the weight of the component increases
Solution Approach 1:
The core is segmented into a cellular structure with multiple cavities rather than a solid mass. This segmentation provides sufficient load-bearing capacity through the distributed cellular framework while maintaining lower weight and preserving more available space compared to a solid core of equivalent strength.
Solution Approach 2:
The core utilizes a porous cellular structure with controlled voids and cavities. This porous configuration delivers the necessary mechanical strength and stiffness while significantly reducing the material density and overall weight, thereby preserving available space without compromising load-bearing capacity.
3Strength
If additional supports are provided at the underside of the component to increase load-bearing capacity, then the strength is improved, but the cost and weight increase and valuable storage space is reduced
Solution Approach 1:
The strengthening structures are merged with the outer layers to form an integral unit rather than separate components. This integration eliminates the need for additional supports at the underside, reducing structural complexity, avoiding extra weight and cost, while preserving storage space. The outer layers themselves provide the strengthening function through their optimized configuration.
Solution Approach 2:
The outer layers serve multiple functions: they provide the primary strengthening capability, form the structural boundaries of the component, and integrate with the cellular core. This multi-functionality eliminates the need for separate strengthening components, simplifying the overall structure while maintaining enhanced load-bearing capacity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances load-bearing capacity while maintaining a lightweight and compact design, offering better dimensional control and reduced manufacturing tolerances, allowing for increased storage space without added weight or cost.
Implementation Method 1
The outer layers are bonded to the core by press molding
Data Source
AI summary
A compression-molded, composite component having a sandwich structure and having integrally formed strengthening structures is disclosed. The component includes a first outer layer having an outer surface, a second outer layer, and a core positioned between the outer layers and having a large number of cavities. The outer layers are bonded to the core by press molding. Portions of at least one of the outer layers are sized, shaped and arranged laterally adjacent to each other in a pattern to provide the component with strength to resist deflection from a load at various positions and orientations at the outer surface.