topic Re: Non-linear materials confusion in Fusion Support Forum

Non-linear materials confusion

Tehnik_spb — Wed, 03 Apr 2019 10:34:55 GMT

Hi! I'm trying to simulate aluminium deformations and discover some strange things. When I choose material in nonlinear static stress study I see icon of non-linear properties for some aluminium alloys. But when I open same alloys in "manage material" -> "material browser" and open advanced preferences there is no non-linear properties.Â

Does it mean that in simulation this alloy will calculate like linear material despite it have non-linear icon? After that I try to check other alloys and found only three, Aluminium - High, Moderate and Low Strength Alloys. They doesn't have icons of nonlinear properties in Study materials in simulation setup, but have it in properties in material browser. When I try to open properties in Study material and click "view advanced material properties" Fusion immediately crash. So, if material have non-linear icon, but don't have non-linear properties in material browser it will be calculated like linear material, right? And should I try to use non-linear moderate-strength aluminium alloy to simulation despite the bug with properties view?

click on view advanced cause crashing fusion 360icon with non-linear propertiessame material with no non-linear properties

Re: Non-linear materials confusion

henderh — Fri, 05 Apr 2019 21:58:31 GMT

Hi Tehnik_spb,

Thank you for bringing these to our attention. I can reproduce the crash the first time I press the button, which is now logged in our system as ID 49059 and forwarded on to Development to look into addressing in an upcoming release.

For the icon, it signifies that the material has fatigue properties. I agree that the icon is not useful in Simulation but would be more useful if it signified nonlinear material properties instead (logged as ID 49057).

To specify a nonlinear material, please choose one from the Fusion 360 Nonlinear material library. The library selector pull-down will display only those types in the study materials drop-down. If a suitable one does not exist, you can use an existing nonlinear material from the library as a basis to define a custom one.

We apologize for the inconvenience.

Best regards,

Re: Non-linear materials confusion

Tehnik_spb — Thu, 11 Apr 2019 08:14:28 GMT

Fusion can do fatigue analysis?

Re: Non-linear materials confusion

henderh — Thu, 11 Apr 2019 21:29:11 GMT

Fusion doesn't offer a fatigue analysis study type currently.
The material library is shared for multiple Autodesk products, fatigue data may still apply for one of those.
I've logged ID 49057 into our system to have the icon removed from Fusion Sim's Study Material dialog until we can offer a fatigue study type.

Thank you for bringing this to our attention.

Best regards,