Fiber Reinforced Composite Frame With Differential Loss Coefficients
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Solution Overview
Problem
Existing fiber reinforced composite frames face a trade-off between bending strength and vibration damping capability, making it difficult to achieve both high bending strength and effective vibration damping simultaneously.
Innovation Solution
A frame design featuring a compressive wall part and a tension wall part with a loss coefficient difference of 0.005 or more, where the compressive wall part contributes to bending strength and the tension wall part enhances vibration damping, using a combination of first and second fiber reinforced composites with different properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a frame is made entirely of high damping material to improve vibration damping capability, then the vibration damping capability is improved, but the bending strength decreases because the high damping material is softer than typical fiber reinforced composite
Solution Approach 1:
The patent applies local quality by differentiating the material properties of different frame components. The tension wall part uses high damping material with superior vibration damping capability, while the compressive wall part uses typical fiber reinforced composite with higher stiffness. This localized material assignment allows each component to optimize its function without compromising the other, resolving the trade-off between damping and strength.
Solution Approach 2:
The patent employs composite materials by combining two types of fiber reinforced composites with different material characteristics. The first fiber reinforced composite provides high damping properties for the tension wall, while the second fiber reinforced composite provides high stiffness for the compressive wall. This composite approach enables the frame to achieve both vibration damping capability and bending strength simultaneously.
2Strength
If typical fiber reinforced composite is used to maintain bending strength, then the bending strength is maintained, but the vibration damping capability is insufficient compared to high damping material
Solution Approach 1:
The patent applies local quality by differentiating the material properties of different frame components. The tension wall part uses high damping material with superior vibration damping capability, while the compressive wall part uses typical fiber reinforced composite with higher stiffness. This localized material assignment allows each component to optimize its function without compromising the other, resolving the trade-off between damping and strength.
Solution Approach 2:
The patent employs composite materials by combining two types of fiber reinforced composites with different material characteristics. The first fiber reinforced composite provides high damping properties for the tension wall, while the second fiber reinforced composite provides high stiffness for the compressive wall. This composite approach enables the frame to achieve both vibration damping capability and bending strength simultaneously.
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 configuration allows for both improved bending strength and vibration damping capability, surpassing the limitations of conventional metal-based frames and enabling effective vibration damping while maintaining structural integrity.
Implementation Method 1
a tension wall part which is away from the compressive wall part and extends in the longitudinal direction, and where a tensile stress occurs in the longitudinal direction when the frame receives the bending load. The tension wall part has a loss coefficient which is larger than a loss coefficient of the compressive wall part by 0.005 or more
Data Source
AI summary
Provided is a frame which is made of a fiber reinforced composite and where a bending strength and a vibration damping capability are compatible. The frame which is made of a fiber reinforced composite includes: a compressive wall part where a compressive stress occurs in a longitudinal direction of the frame when the frame receives a bending load in a normal direction perpendicularly intersecting the longitudinal direction; a side wall part extending in the normal direction and defining one of the corners with the compressive wall part; and a tension wall part which is away from the compressive wall part and extends in the longitudinal direction, and where a tensile stress occurs in the longitudinal direction when the frame receives the bending load. The tension wall part has a loss coefficient which is larger than a loss coefficient of the compressive wall part by 0.005 or more.