Integrated Hinge in Composite Structure
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Solution Overview
Problem
Composite materials, such as carbon fiber reinforced polymers, are typically rigid, making them unsuitable for applications requiring flexibility and durability over multiple bending cycles, such as in aviation where access to internal structures is needed.
Innovation Solution
A composite structure with an integrated hinge is developed by interleaving high-strength synthetic fiber fabric, like Kevlar, between layers of carbon fiber reinforced polymer to create a flexible hinge that allows for bending and secure attachment between rigid components, eliminating the need for additional adhesives or hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid composite materials like carbon fiber reinforced polymer are used, then structural strength is improved, but flexibility and durability over bending cycles deteriorate
Solution Approach 1:
The patent uses a composite material system combining carbon fiber reinforced polymer layers with interleaved Kevlar hinge layers. The carbon fiber layers provide structural strength and rigidity, while the Kevlar hinge layers provide flexibility and bending durability. This composite structure resolves the contradiction by integrating materials with complementary properties in a layered configuration where each material performs its optimal function.
Solution Approach 2:
The patent segments the composite structure into distinct functional layers: rigid carbon fiber reinforced polymer layers for structural strength and flexible Kevlar hinge layers for bending capability. By dividing the structure into segments with different material properties, the patent achieves both strength and flexibility simultaneously, with the hinge region specifically designed to accommodate bending cycles.
2Stability of the object's composition
If rigid composite materials are used, then structural integrity is improved, but suitability for applications requiring repeated bending deteriorates
Solution Approach 1:
The patent employs a composite material system where carbon fiber reinforced polymer layers maintain structural integrity while interleaved Kevlar hinge layers provide durability against repeated bending. The composite structure allows the rigid portions to maintain integrity and the flexible hinge portions to withstand cyclic bending, resolving the contradiction between structural stability and bending durability.
Solution Approach 2:
The patent applies local quality by providing different material properties at different locations within the structure. The carbon fiber reinforced polymer layers at the structural portions provide high integrity, while the Kevlar hinge layers at the bending region provide enhanced durability for repeated cycles. This localized differentiation resolves the contradiction by optimizing each region for its specific functional requirement.
3Strength
If additional adhesives or hardware are used to create hinges, then connection strength is improved, but device complexity increases
Solution Approach 1:
The patent merges the hinge function directly into the composite laminate structure by interleaving Kevlar layers during the manufacturing process. This integration eliminates the need for separate adhesives, mechanical fasteners, or additional hardware components. The hinge capability emerges from the composite structure itself, reducing device complexity while maintaining connection strength through the bonded laminate construction.
Solution Approach 2:
The composite structure provides its own hinge functionality through the interleaved Kevlar layers, eliminating the need for external adhesives or hardware. The structure is self-sufficient, with the hinge capability inherent in the material composition and layering arrangement, thereby reducing complexity while maintaining structural integrity and connection strength.
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 integrated hinge enables durable, flexible connections with minimal drag and reduced complexity, allowing for easy access to internal components without compromising structural integrity.
Implementation Method 1
Composite materials, such as carbon fiber reinforced polymer materials, typically are used in applications in which properties of such materials may be advantageous
Implementation Method 2
interleaving high-strength synthetic fiber fabric, like Kevlar, between layers of carbon fiber reinforced polymer to create a flexible hinge
Data Source
AI summary
A composite structure with an integrated hinge is disclosed. In various embodiments, the composite structure includes a plurality of layers of fiber reinforced polymer material; and a hinge structure comprising one or more layers of bendably flexible hinge material a first region of which is interleaved between adjacent layers of said layers of fiber reinforced polymer material comprising the composite structure and bonded to said adjacent layers by bonding material comprising said composite structure, and a second region of which extends beyond said layers of fiber reinforced polymer material comprising the composite structure.