Compression Set: Definition, How It Works, and Understanding the Graph
A compression set is a measurement of the amount of change in a material’s shape or size when it is subjected to forces or stresses. It is an important factor for determining the longevity and performance of materials used in various industries, from automotive to medical and beyond. In this article, we will discuss what a compression set is, how it works, and how to understand the graph associated with it.
What is a Compression Set?
Compression set is the amount of permanent deformation a material undergoes when it is subjected to a specific level of force over a period of time. This is typically measured as a percentage of the original dimension of the material. The higher the compression set, the more the material has been deformed and the less resilient it is.
In most applications, the material used must not be too brittle or too flexible. The ideal material should have enough flexibility to withstand the applied forces while also being able to return to its original shape and size when the forces are removed. Compression set is used to measure the ability of a material to do this.
How Does Compression Set Work?
Compression set is typically measured using a compression set test. This involves placing a sample of the material in a clamping device and then applying a known force over a set time period. At the end of the test, the material is inspected to determine how much of the original shape and size has been lost. This is expressed as a percentage of the original dimension.
The test is typically done at different levels of force in order to determine how much the material can withstand before undergoing permanent deformation. This information can then be used to select a material that is suitable for the application.
Understanding the Graph
When testing for a compression set, it is common to plot the results on a graph. This graph will usually have two axes, with one axis representing the force applied and the other axis representing the amount of compression set. The graph will typically look like a bell curve, with the highest point indicating the maximum amount of compression set that can be tolerated by the material.
The graph is useful in helping to select a material that is suitable for the application. For example, if the application requires a material with a low compression set, then the material should be selected from the lower portion of the graph. Similarly, if the application requires a material with a high compression set, then the material should be selected from the higher portion of the graph.
Conclusion
Compression set is an important factor in determining the longevity and performance of materials used in various industries. It is measured using a compression set test, which involves applying a known force over a set time period. The results can then be plotted on a graph, which can be used to select a material that is suitable for the application. By understanding the compression set and the associated graph, you can make informed decisions about which materials to use for your project.