Attachable Elastomeric Pad for Composite Parts
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Solution Overview
Problem
Direct vulcanization of elastomeric layers to composite parts often results in weak bonds and potential damage to the parts due to high temperatures required, which can cause brittleness in elastomeric materials and deformation in composite parts, while liquid adhesives fail to provide a strong and durable attachment.
Innovation Solution
The method involves calendering an elastomeric material into a uniform layer, vulcanizing it to a composite shim with reinforcement and adhesive layers, and then attaching the shim to the composite part using a structural adhesive, thereby reducing heat and pressure requirements and ensuring a strong bond without directly exposing the part to the vulcanization process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If direct vulcanization is used to attach elastomeric layers to composite parts, then strong bonding is achieved, but the high temperature causes brittleness in elastomeric materials and deformation in composite parts
Solution Approach 1:
A calendered elastomeric layer is introduced as an intermediary between the adhesive and the composite part. This layer is pre-calendered to uniform thickness before bonding, allowing it to serve as a buffer that protects the composite part from excessive heat while maintaining strong adhesive bonding to the elastomeric material.
Solution Approach 2:
The bonding system is segmented into distinct functional layers: the adhesive layer for bonding, the calendered elastomeric layer for protection and uniformity, and the composite part. This segmentation allows each layer to perform its specific function optimally, with the calendered layer shielding the part from thermal damage.
2Ease of operation
If liquid adhesive is used for attachment, then ease of application is improved, but bond strength and durability are insufficient
Solution Approach 1:
The bonding solution uses a composite approach combining liquid adhesive with a calendered elastomeric layer. The liquid adhesive provides ease of application and bonding, while the calendered elastomeric layer reinforces the bond and provides protective functions, creating a composite bonding system that achieves both ease of operation and high strength.
3Volume of moving object
If thick elastomeric layers are applied directly, then adequate material thickness is achieved, but uniformity and heat distribution are poor
Solution Approach 1:
The elastomeric material is pre-calendered to the desired uniform thickness before the bonding process. This preliminary action ensures that when the material is subsequently bonded to the composite part, it maintains consistent thickness and provides uniform heat distribution, eliminating the need for thick, non-uniform applications.
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 approach allows for a strong and durable attachment of elastomeric pads to composite parts with reduced risk of damage, maintaining the parts' integrity and elasticity while providing a thicker elastomeric layer and improved heat distribution, ensuring the elastomeric material does not age prematurely.
Implementation Method 1
An elastomeric material is vulcanized to an adhesive layer and a reinforcement layer to form a composite shim
Implementation Method 2
calendering an elastomeric material into an elastomeric layer having a thickness that is more uniform than the elastomeric material prior to the calendaring
Data Source
AI summary
According to one embodiment, a method comprises calendering an elastomeric material into an elastomeric layer having a thickness that is more uniform than the elastomeric material prior to the calendaring. After calendaring, the elastomeric layer is vulcanized to a composite shim comprising at least one reinforcement layer and at least one layer of adhesive.