Composite Vibration-Damping Body With Strain-Concentrating Recess
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Solution Overview
Problem
Conventional composite vibration-damping bodies exhibit insufficient vibration damping performance due to dispersed strain distribution across multiple elastic bodies, leading to inadequate attenuating action.
Innovation Solution
A composite vibration-damping body is designed with a first elastic body of higher attenuation material featuring a recessed part that concentrates strain, allowing for enhanced attenuating action by focusing strain in a specific strain concentration part, while a second elastic body with lower compression set provides additional shock absorption and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple elastic bodies are overlapped with each other, then the degree of freedom in adjusting spring characteristics is improved, but the strain is dispersed and the attenuating action becomes insufficient
Solution Approach 1:
The first elastic body is designed with a recessed part that creates a strain concentration part, making the strain distribution non-uniform. This local quality change ensures that strain concentrates in specific regions of the first elastic body rather than being dispersed throughout multiple elastic bodies, thereby enhancing the attenuating action while maintaining the composite structure's adaptability
Solution Approach 2:
The invention uses a composite structure of two elastic bodies with different hardness values and material properties. The first elastic body has higher attenuation characteristics while the second has lower hardness, creating a composite system that combines both high energy dissipation capability and adjustable spring characteristics through the interaction of these dissimilar materials
2Loss of energy
If strain is concentrated in a specific part of the first elastic body, then the attenuating action is enhanced, but the structure becomes more complex
Solution Approach 1:
Instead of creating entirely separate components, the invention modifies the first elastic body by forming a recessed part within it. This local structural modification creates the strain concentration effect without requiring additional separate parts, thus enhancing attenuating action while minimizing increases in overall structural complexity
Solution Approach 2:
The first elastic body is segmented into different functional regions through the recessed part, creating a strain concentration part and other regions with different strain distributions. This internal segmentation allows strain concentration in specific areas without requiring external complex mechanisms or additional components
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 achieves excellent vibration damping performance by concentrating strain in the first elastic body's recessed part, enhancing energy attenuation and maintaining durability and shock absorption capabilities.
Implementation Method 1
a strain concentration part configured to be subjected to an increased strain during load input is set to a wall of the gap of the first elastic body
Implementation Method 2
the first elastic body is formed of a material having higher attenuation than that of the second elastic body
Implementation Method 3
attenuating action exhibited by deformation of the elastic body during load input
Data Source
AI summary
A composite vibration-damping body including a first elastic body and a second elastic body overlapped with each other, wherein the first elastic body is formed of a material having higher attenuation than that of the second elastic body, the first elastic body includes a recessed part opening onto a surface of the first elastic body, and the recessed part forms a gap, and a strain concentration part configured to be subjected to an increased strain during load input is set to a wall of the gap of the of the first elastic body.