Self-Transforming Fibrous Composite Structures
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Solution Overview
Problem
Existing 3D printing technologies lack the ability to create self-transforming structures that can change shape predictably in response to external stimuli, such as temperature changes, due to limitations in material expansion and contraction rates and orientation patterns.
Innovation Solution
A self-transforming structure is created by combining a flexible, fibrous composite with an added material having a different expansion or contraction rate, where the added material's grain pattern is oriented relative to the weave pattern of the fibrous composite, allowing for predictable shape transformation in response to external stimuli like temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing 3D printing technologies are used, then manufacturing capability is available, but the ability to create self-transforming structures with predictable shape change is lacking
Solution Approach 1:
The patent combines two different materials with distinct properties: a flexible fibrous composite and an added material with different expansion/contraction characteristics. This composite structure enables self-transformation by exploiting the differential response of each material to external stimuli, achieving predictable shape change that neither material could accomplish alone.
Solution Approach 2:
The added material is strategically positioned and oriented at specific angles (0°, 45°, or 90°) relative to the weave pattern of the flexible fibrous composite. This local orientation control creates non-uniform expansion or contraction patterns that drive predictable shape transformations in specific directions, enabling precise control over the transformation behavior.
2Adaptability or versatility
If materials with different expansion rates are combined, then self-transformation is enabled, but control over transformation direction and predictability is limited
Solution Approach 1:
The patent employs specific grain pattern orientations (0°, 45°, or 90°) of the added material relative to the weave pattern to control the direction and nature of transformation. By locally orienting the grain pattern at predetermined angles, the invention achieves predictable shape changes in specific directions, transforming the uncontrollable differential expansion into a designable transformation behavior.
Solution Approach 2:
The invention controls transformation parameters by varying the grain pattern orientation angles and the dimensions of the added material. By changing these parameters, predictable shape transformations can be programmed into the structure, enabling control over transformation direction, magnitude, and timing in response to external stimuli.
3Manufacturing precision
If grain pattern is oriented relative to weave pattern, then predictable self-transformation is achieved, but manufacturing complexity increases
Solution Approach 1:
The invention divides the structure into two distinct functional segments: the flexible fibrous composite substrate and the added material with grain pattern. This segmentation allows each component to be designed and manufactured independently with optimized properties, then combined to achieve the overall self-transformation function, reducing overall manufacturing complexity.
Solution Approach 2:
By combining the flexible fibrous composite with the added material in a composite structure, the invention achieves predictable self-transformation through the synergistic interaction of materials with different properties. The composite design allows standard manufacturing techniques to be used for each material separately, avoiding the need for entirely new complex manufacturing processes.
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
This approach enables the creation of structures that can transform from a flat configuration into a three-dimensional shape, offering strength, elasticity, and adaptability suitable for various industries including aviation, automotive, and building materials.
Implementation Method 1
The flexible, fibrous composite and the added material have different expansion or contraction rates in response to an external stimulus to cause the structure to self-transform
Data Source
AI summary
A self-transforming structure is formed from a flexible, fibrous composite having a weave pattern of fibers woven at intersecting angles, the weave pattern having a boundary and one or more axes for the fibers, and an added material coupled to the flexible, fibrous composite to form a structure, wherein the flexible, fibrous composite and the added material have different expansion or contraction rates in response to an external stimulus to cause the structure to self-transform, and wherein the added material has a grain pattern oriented relative the weave pattern of the flexible, fibrous composite. Applications of the self-transforming structures include aviation, automotive, apparel/footwear, furniture, and building materials. One particular example is for providing adaptive control of fluid flow, such as in a jet engine air inlet.