Embedded Wire-Rope Composites for Resonant Vibration Damping
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Solution Overview
Problem
Existing composite materials used in vehicle components lack effective vibration dampening capabilities, particularly under dynamic loading conditions, where friction dampening is limited due to uniform distribution of reinforcing materials that prevent inter-wire friction.
Innovation Solution
Embedding metal cables or ropes with plural individual wires into the composite materials during the molding process, allowing for dry friction between the wires to occur, which is controlled by adjusting the pressure in the mold to achieve a predetermined resonant vibration dampening capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcing materials are uniformly distributed in the matrix, then the composite material achieves high strength and stiffness, but the vibration dampening capacity is reduced due to prevention of inter-wire friction
Solution Approach 1:
The reinforcing material is segmented into discrete cable elements rather than being uniformly distributed. Each cable consists of multiple individual wires that can move relative to one another, creating friction interfaces that dampen vibrations while maintaining overall structural strength.
Solution Approach 2:
The cable elements are strategically positioned at specific locations within the composite material where vibration dampening is most needed. The local arrangement of wires within each cable allows for inter-wire friction to occur, providing targeted vibration control while maintaining high strength at critical locations.
2Object-affected harmful factors
If metal cables or ropes with plural individual wires are embedded in composite materials, then vibration dampening capacity is increased through dry friction, but the manufacturing complexity increases
Solution Approach 1:
The metal cables or ropes with their multiple individual wires are prepared and positioned in the mold before the composite material is molded. This preliminary placement ensures proper positioning and allows the molding process to encapsulate the cables, creating the friction interfaces needed for vibration dampening without requiring complex post-processing steps.
Solution Approach 2:
The embedding of vibration-dampening cables is merged with the composite material molding process itself. By integrating the cable placement and material molding into a single manufacturing step, the process complexity is minimized while still achieving the desired vibration dampening through the embedded cable structure.
3Object-affected harmful factors
If pressure in the mold is adjusted during molding, then the amount of dry friction between wires is controlled to achieve predetermined resonant vibration dampening, but the manufacturing precision requirements increase
Solution Approach 1:
The mold pressure is used as a controllable parameter to adjust the amount of dry friction between the wires in the embedded cables. By varying the pressure during molding, the tightness of the wire packing and the resulting friction force can be controlled, allowing for predetermined resonant vibration dampening characteristics to be achieved through parameter optimization rather than complex geometric design.
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 enhances the vibration dampening capacity of composite components by utilizing Coulomb friction between the wires, effectively reducing the sensitivity to dynamic loading and improving the material's ability to resist resonant vibrations, while maintaining structural integrity and reducing weight.
Implementation Method 1
an amount of dry friction developed by sliding movement of contact surfaces between said outer wires dampens resonant vibration of the component
Data Source
AI summary
A method and system for increasing dampening capacity utilizing dry friction between individual wires of a rope embedded in a molded component formed from a composite. The individual wires allow inter-wire friction to occur during part vibration. The amount of inter-wire friction is controlled by the pressure when the component is molded. The component includes a body that is a molded matrix formed form a composite material. The body may be of any material selected from the group consisting of a polymer, a metal or a ceramic material. One or more vibration-dampening ropes are embedded in the body. The vibration-dampening ropes may be elongated segments or may be a rope having connected ends that form one or more rings. The vibration-dampening rope includes at least outer wires and can further include a plurality of inner wires surrounded by the outer wires. Composite material is prevented from passing through the outer wires, thereby forming voids between the wires.