Dahmoun Mohamed Ridha

Result Solidworks simulation safe or not?

Question by Dahmoun Mohamed Ridha

Hello everyone

It is the study of movement and security of a roof with stainless steel tube and covered with glass 10mm thickness, overlap roof terrace size 9.14 x 8.2 m therefore 75m2.
<a target="_blank" href="https://imageshack.com/i/n1jrcej"><img src="http://imagizer.imageshack.us/v2/xq90/829/jrce.jpg" border="0"></a>
The weight of the glass thickness of 10mm and 25kg \ m2 so I have a total 1875kg which will be distributed on the upper units of the structure.
I simplified and fixed the model and specify the forces.
The layout of automatic movement gives me this result
<a target="_blank" href="https://imageshack.com/i/f6sxbuj"><img src="http://imagizer.imageshack.us/v2/xq90/546/sxbu.jpg" border="0"></a>
And after put at scale,
<a target="_blank" href="https://imageshack.com/i/0wptg"><img src="http://imageshack.com/a/img32/594/pt.gif" border="0"></a>
this is the result
<a target="_blank" href="https://imageshack.com/i/n1ofn7j"><img src="http://imagizer.imageshack.us/v2/xq90/829/ofn7.jpg" border="0"></a>
In the layout of security I chose the von Mises stresses max and I worked with the safety factor 1 and even more,
<a target="_blank" href="https://imageshack.com/i/g1cg3xg"><img src="http://imageshack.com/a/img577/1232/cg3x.gif" border="0"></a>
and the result is impeccable.
<a target="_blank" href="https://imageshack.com/i/167hqtj"><img src="http://imagizer.imageshack.us/v2/xq90/42/7hqt.jpg" border="0"></a>

My question is: can I trust these results to move to the fabrication and erection or not?
And how can I know if the roof will withstand that weight for a long time or not? With the wind and the rain?


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1 Answer

Lukasz Siwiec
Answered on 12 Mar, 2014 07:41 AM

I see you do this in static simulation, so I don't trust this. I try to you use a non-linear dynamic beacause in this simulation you can obtain very real results. In static simulation you have only one pick, I mean max. force in very short time.

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