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No values for stress sensors when using weldments in design study

Question asked by Karel Notebaert on Apr 7, 2016

Hi all,

I am currently working on a thesis where I am drawing an ULM aircraft.

carburatoren 2.JPG

Now, I'm doing a design study on the lift struts. When I do a static simulation, I get results for stress as seen in the picture below.

simulatie.jpg

But when I'm running my design study with different force loads, I don't get values for stress. Even though I've added a stress sensor for model max in the constraints.

design study.jpg

The minimum factor of safety gives me values but stress doesn't. This makes no sense to me...

Did someone had a similar problem and knows how to solve this? (For the lift strut, I used weldments.)

Thank you!

Karel

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