Learning Forum

[happykiran]

Hi, 
Please help me how can I comapre deflection results with two different materials which have the same young modulus but different hardness.

I have attached material properties for reference ( C-1018 and C-1008)

[SaiD]

Hi,

Due to company policies, Ansys employees cannot download any attachments. Could you use the "Insert Image" option to add images to your post instead? What does your geometry look like and what are the boundary conditions you are applying?

You can create one analysis, assign material 1 to it and solve it. Then duplicate the analysis in Workbench, change the Material Assignment to material 2 and solve it. Then you can compare the deflection results.

 

Hope this helps,

Sai

 

[happykiran]

Hi the procedure u told i agree but how i can compare results if the young modulus Is same in both materials.

[Rob]

In CFD Post we can read two data sets into a single session. Can you do the same with Mechanical into CFD Post? 

[happykiran]

I'm doing static structural analysis. with two materials say x and y where Y is harder material with the young modulus. ow can I relate both results on deflection

[SaiD]

Hardness cannot be defined as a material property in Ansys (or any FEA software) since Hardness only affects the localized surface behavior and not the bulk behavior of a body (the bulk behavior is controlled by Young's modulus, Poisson's ratio etc.). I am not sure what kind of loads you have and what the objective of the simulation is. Based on what I understand, Hardness is affected by the Yield Strength of a material. So FEA can be used to calculate the hardness number of a surface (assuming you have other material properties available), but it cannot be provided as an input.

In case you are trying to simulate a hardness test you may find these discussion helpful:

https://forum.ansys.com/forums/topic/simulation-of-vickers-hardness-test-on-a-substrate-with-coating/

 

The only other option I can think of in case where the body (with material x or y) is coming in contact with another body, is varying the contact stiffness. I assume a harder material will have a higher contact stiffness. But calculation of contact stiffness (even when hardness is not in picture) is an a straight forward thing and you may have to search around a bit to figure that out.

 

Hope this helps,

Sai 

[happykiran]

Hi, Sai thanks a lot for your explanation. I clarify that I'm looking for deflection values. in X material I'm getting 0.5" values (roughly) and now I want to change material to Y which is harder than X. so if I run the simulation I will get the same deflection since Elastic modulus and Poisons ration is same.

[SaiD]

Yes, unless you are doing an indentation test or hardness test, both the materials will give the same deflection.