Calculating the Elasticity of an Annular Disc Without Prior Information

In summary, the conversation discusses different methods for calculating the elasticity of an annular disc with unknown material properties. These methods include finite element analysis, nanoindentation, and uniaxial testing. A possible approach is suggested by performing a test without cutting the disc and using clamps to apply force at the sides.
  • #1
umer_majid
1
0
Hi,

I have an annular disc that looks like the following:

Rubber-Backing-Pad-0582282.jpg


I need to get the elasticity of the material, since I don't have any information on it. Does anyone have any suggestions on how I can calculate the elasticity?

Maybe I can get a force/displacement curve by bending the disc (held at the center)? I have equipment to do that. But how can I use that information to get the modulus?

Any help will be appreciated :)

Thanks & Regards,

Umer
 
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  • #2
Hi umer_majid, welcome to PF!

One approach is to model the geometry by finite element analysis, obtain the force/displacement response, and match that to experiment. Another is to find someone to perform nanoindentation on the material to measure its stiffness. Another (destructive) method is to cut out a rectangular section and perform uniaxial testing on it.
 
  • #3
I don't know the dimensions of your annular disc, but if you only need Young module and the material is not plstic (no linear elasticity) , may be you can try test without cut. Use the clamp to clamping at both sides of one radio.
 

1. What is the concept of elasticity of annular disc?

The elasticity of annular disc refers to the ability of a disc-shaped object with a circular hole in the middle to resist deformation and return to its original shape when a force is applied. It is a measure of how much the shape of the disc can change without permanently altering its structure.

2. How is the elasticity of annular disc measured?

The elasticity of annular disc is typically measured using a material property called Young's modulus. This is a measure of the stiffness of a material, and it is defined as the ratio of stress (force per unit area) to strain (change in length per unit length) in the direction of the applied force. The higher the Young's modulus, the stiffer the material and the more elastic the disc will be.

3. What factors affect the elasticity of annular disc?

There are several factors that can affect the elasticity of annular disc, including the material properties of the disc, such as its Young's modulus and Poisson's ratio, the dimensions of the disc, and the magnitude and direction of the applied force. Additionally, the temperature and environment in which the disc is subjected to the force can also play a role in its elasticity.

4. How does the elasticity of annular disc differ from other shapes?

The elasticity of annular disc is similar to other shapes in that it is a measure of the resistance to deformation. However, the specific properties and behavior of an annular disc may differ from other shapes due to its unique geometry and design. For example, the circular hole in the middle of the disc can affect its overall stiffness and ability to withstand deformation.

5. How can the elasticity of annular disc be used in practical applications?

The elasticity of annular disc has various practical applications, such as in the design of springs, bearings, and other mechanical components. It is also important in the field of material science and engineering, as it can help determine the suitability of certain materials for specific purposes. Additionally, understanding the elasticity of annular disc can aid in the development of more efficient and durable structures and products.

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