Circumferentially Wrapped Wood Veneers for Structural Strength
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Solution Overview
Problem
Conventional wood-based hollow structures lack sufficient mechanical properties for structural applications, and the manufacture of metal, concrete, and plastic components contributes to greenhouse gas emissions and plastic waste.
Innovation Solution
Densified, lignin-compromised fibrous plant material veneers are subjected to in situ lignin modification or delignification, then wrapped around a central axis to form circumferentially-extending walls, allowing structures of any desired size and shape, with tailored mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional wood-based hollow structures are used, then environmental sustainability is improved, but mechanical properties are insufficient for structural applications
Solution Approach 1:
The patent applies parameter changes by densifying the wood veneers through compression and modifying the lignin content through chemical treatment. This transforms conventional wood with insufficient mechanical properties into densified wood with enhanced strength, density, and stiffness, while maintaining the environmental sustainability of using renewable plant-based materials instead of metal, concrete, or plastic
Solution Approach 2:
The patent creates composite material structures by combining multiple veneer layers with different orientations and densities. The circumferential wrapping of densified veneers around a central axis forms a composite hollow structure that achieves superior mechanical properties comparable to or exceeding traditional materials, while remaining environmentally sustainable
2Strength
If metal, concrete, and plastic components are manufactured, then mechanical strength is improved, but greenhouse gas emissions and environmental pollution increase
Solution Approach 1:
The patent transforms renewable plant-based materials through parameter changes including densification and lignin modification to achieve mechanical strength comparable to metal, concrete, and plastic. This eliminates the need for harmful manufacturing processes while maintaining structural performance
Solution Approach 2:
The patent uses renewable, biodegradable plant-based materials that can be sustainably sourced and processed. Unlike metal, concrete, and plastic that require energy-intensive manufacturing and contribute to pollution, the densified wood structures offer a sustainable alternative with reduced environmental impact throughout their lifecycle
3Ease of manufacture
If conventional wood veneers are used, then ease of manufacture is improved, but dimensional limits are constrained by source material size
Solution Approach 1:
The patent applies segmentation by dividing the final structure into multiple veneer layers that can be manufactured separately and then assembled through circumferential wrapping. This allows the source material dimensions to be overcome, enabling construction of structures with any desired size, length, or diameter by stacking and wrapping multiple veneer segments
Solution Approach 2:
The patent transitions from two-dimensional veneer sheets to three-dimensional hollow structures through circumferential wrapping around a central axis. This dimensional transformation allows unlimited structural dimensions to be achieved by controlling the number of layers, wall thickness, and wrapping configurations
4Strength
If densification and lignin modification are applied to fibrous plant material, then mechanical strength is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes through densification and lignin modification to enhance mechanical strength. While these processes add manufacturing steps, they transform readily available plant-based materials into high-performance structural components with strength comparable to traditional materials, justifying the additional processing complexity
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 resulting structures exhibit enhanced mechanical strength and energy absorption, overcoming dimensional limitations and environmental impacts of traditional materials.
Implementation Method 1
the one or more fibrous plant material veneers are subjected to in situ lignin modification or delignification (e.g., partial or full)
Implementation Method 2
densified by pressing in a direction crossing a longitudinal growth direction of the fibrous plant material
Data Source
AI summary
A structure can be formed by wrapping one or more densified, lignin-compromised wood veneers wrapped around a central axis. The wrapped wood veneers can form a circumferentially-extending wood wall. A glue can be provided on one or more surface portions of each wood veneer. The wood veneers can be lignin-compromised by in situ lignin modification, partial delignification, or full delignification. The circumferentially-extending wood wall can form a hollow member, for example, a tube, pipe, cup, tank, or bottle. Alternatively, the circumferentially-extending wood wall can surround a central member, for example, to form a rod, bat, club, or dowel.