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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
Zdravko,
FEA Programs, including SolidWorks Simulation, work on the basis of properties other than hardness, like the Young's Modulus, Poisson's Ratio, and Yield Strength. I don't know much about measuring hardness in metals, but in plastics and rubbers you can have materials with the same hardness that have quite different values of stiffness and strength. If this is also true for metals, then you will need to decide what type of material you will be wanting to use, then find the material properties above for that material with the proper hardness. If that material doesn't already exist in the SolidWorks library, then you will need to make a new material with the required properties. I'm not familiar with how to do that in SolidWorks.
Jerry S.
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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
If you are doing a linear static problem then just go to assign a material, right click to add a new material library and then right click to add a material. You'll only need the Young's Modulus and Poisson's Ratio because those are the only characteristics which are used by linear static FEA. Hardness and material strength don't enter into the computation.
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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
what do you need the hardness to contribute to the application?
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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
I have a similar question and my situation is this:
I am simulating a linear roller bearing. An unidirectional radial load is placed on the inner member, so I want to simulate the stress placed on the outter member as the rollers excert pressure on the outter's member inner surface.
When I do the simulation, the entire body of the outter member appears to withstand the load with a healty degree of safety. However, the very spots where the ball bearings sit against the inner face of the outter member are highly indented, well beyond the yield strenght of the material. I know by experience hardened steel is used, but so far I have not managed to find how to simulate that condition.
Thanks for whtever help you might throu in this direction.
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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
I'd have to look at it, but in general I would not trust the results at a point-like contact. I'd do a Hertz contact stress hand calc for that. The FEA will be valid far from the singularities. Hardness won't affect the results, only the elastic properties will.
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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
Many thanks to all for you inputs and ideas. I got my answer. Not sure if Andreev got his. I got mine. Following Pogue's advice, I changed the model in the simulator to appear as a non-uniform load along the inner surface of the outter member. It worked great as it allowed me to see the behavior of the entire member piece, both on stress and fatigue as well. Then for contact stresses I made a hertzian calc. It all worked as expected and results were confirmed at the lab.
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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
hi, probably best to create a thread for this and post a picture. i can't totally tell how much fidelity you have in the model and don't think the material is causing your issue. in the end, for the material, the answer is to just create a material with that hardness.
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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
The answer is no. Hardness is not a unit of measurement. It is based on a test method where a ball makes an indentation. The closest you can get is relating hardness test results to Ultimate tensile stress (UTS). I suggest you talk to the Hardness Equipment manufactuer if you really want to go down this road as each manufacturer has their own conversion chart to UTS.
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Re: SolidWorks sumulation - how to add material with Brinell Hardness 60HB
There are conversion charts to ASTM standards. A quick web search will bring up a number of them.
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