## Finding Stresses AND Factor of Safety Calculations on 3D jig

## Finding Stresses AND Factor of Safety Calculations on 3D jig

(OP)

Hello,

I had an interview where I had to figure out the FOS at the point where the jig was most likely going fail. Didn't get all the way through the problem and didn't know if if i started out the problem correctly. Could I get some help with working through the problem? The attachment has the information given in the problem that I can remember.

Thanks,

Reuben Huddleston

I had an interview where I had to figure out the FOS at the point where the jig was most likely going fail. Didn't get all the way through the problem and didn't know if if i started out the problem correctly. Could I get some help with working through the problem? The attachment has the information given in the problem that I can remember.

Thanks,

Reuben Huddleston

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

do they really need 5 decimal places ? maybe for tooling, but ??

that's a lot for an interview calc !

i'd look at the two ends of the inclined flange.

another day in paradise, or is paradise one day closer ?

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

Thanks for responding! No they didn't ask for 5 dec. places that was just my settings in AutoCad

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

another day in paradise, or is paradise one day closer ?

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

where would you analyze the structure ?

another day in paradise, or is paradise one day closer ?

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

point B or A sure ... there's a subtle difference between the two. The moment at A is clearly higher, but ...

another day in paradise, or is paradise one day closer ?

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

## RE: Finding Stresses AND Factor of Safety Calculations on 3D jig

I suspect section C will have the highest margins, and so therefore not critical. Just like a tension failure in the green web area isn't likely to be critical.

Section A has the higher bending moment, but there's a twist in the calcs that makes it stronger than section B and so it isn't really obvious which is critical.

another day in paradise, or is paradise one day closer ?