Carbon Nanotube Fiber Composite Tube for Vibration Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fiber composite materials used in mechanical arms face challenges with insufficient vibration damping, brittleness leading to high stress breakage, and high raw material costs, which affect throughput and structural integrity.
Innovation Solution
A fiber composite structure is developed with a specific ratio of multilayered carbon nanotube composite resin layers to fiber prepreg layers, forming a hollow tube body, where the composite resin layers cover 40% to 60% of the area of the fiber prepreg layers, enhancing vibration damping while maintaining mechanical strength and reducing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If polymeric fiber composite materials are made thinner, lighter and shorter to meet light weight requirements, then weight is reduced, but vibration damping characteristics deteriorate and brittleness increases
Solution Approach 1:
The patent applies composite materials by combining polymeric fiber composite materials with viscoelastic damping layers and high-strength reinforcement layers. This creates a multi-layer composite structure that integrates lightweight properties with vibration damping and fracture resistance, resolving the contradiction between weight reduction and vibration damping characteristics
Solution Approach 2:
The patent applies local quality by placing viscoelastic damping layers and high-strength reinforcement layers at specific positions within the composite structure. The damping layers are positioned to maximize vibration absorption, while reinforcement layers are strategically located to prevent fracture at critical stress points, allowing different regions to have specialized functions that address both weight and reliability requirements
2Strength
If materials with higher physical strength are used to prevent breakage, then strength is improved, but brittleness increases and vibration damping effect deteriorates
Solution Approach 1:
The patent uses composite materials combining high-strength polymeric fiber composite layers with viscoelastic damping layers and additional reinforcement layers. This multi-material composite structure allows the system to achieve high overall strength while the viscoelastic components provide ductility and energy absorption, preventing catastrophic brittle failure
Solution Approach 2:
The patent applies beforehand cushioning by incorporating viscoelastic damping layers that absorb and dissipate energy before stress can propagate through the high-strength polymeric layers. This cushioning effect prevents stress concentration that would lead to brittle fracture, allowing the use of high-strength materials without the associated brittleness problem
3Reliability
If damping characteristics are improved to reduce vibration attenuation time, then vibration damping effect is improved, but material cost increases
Solution Approach 1:
The patent applies local quality by positioning damping and reinforcement layers at specific locations where vibration and stress are most critical. Rather than uniformly distributing damping materials throughout the entire structure, the design places them strategically to maximize vibration attenuation effectiveness while minimizing the total quantity of expensive damping material required
Solution Approach 2:
The patent uses composite materials that combine relatively inexpensive polymeric fiber composite layers with smaller quantities of viscoelastic damping layers and reinforcement layers. This composite approach achieves effective vibration damping through the synergistic interaction of different materials, reducing the total material cost compared to using large quantities of pure viscoelastic damping material
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 significantly improves vibration damping efficiency, reduces vibration attenuation time, and maintains structural hardness, offering a broader range of applications with reduced material costs and improved competitiveness.
Implementation Method 1
the composite resin layer and the fiber prepreg layers wind together to form a hollow tube body... significantly improves vibration damping efficiency, reduces vibration attenuation time
Implementation Method 2
at least one composite resin including a plurality of multilayered carbon nanotubes and a second resin... being disposed between two of the fiber prepreg layers
Data Source
AI summary
A fiber composite structure is provided that includes a plurality of fiber prepreg layers and at least one composite resin layer. The fiber prepreg layer includes a first resin and a plurality of fibers impregnated with the first resin. The composite resin layer includes a plurality of multilayered carbon nanotubes and a second resin, and is disposed between the two of the fiber prepreg layers. The composite resin layer and the fiber prepreg layers wind together to form a hollow tube body, in which the ratio of the number of layers of the composite resin layer to the fiber prepreg layers is from 1:4 to 1:7, and each composite resin layer covers 40% to 60% of the area of the adjacent fiber prepreg layers.