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School project : frame analysis safety factor of 0 ?
School project : frame analysis safety factor of 0 ?
For a school project I'm required to study a frame structure of some ultra-light helicopter's skids. I need to design the skids with different sizes of tubes in order for the skids to be compliant with the french aviation norm. This norm is heavely based on safety factors and when I run my analysis I'm getting some weird results (I'm assuming they are weird because of my inexperience)
Von Misses stress seems quite ok but the safety factor is all over place. Any idea if this result is logical ? Am I missing something ? I think it has something to do with the constraints but I don't get it
The only thing questionable that I see is the factor of safety is shown as 0 instead of infinity where the stress result is 0. I assume that choice was made because computers do not like to divide by 0! It tends to make programs crash. 😉
John Holtz, P.E. Global Product Support Autodesk, Inc.
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