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MIT-LAE / TASOPT.jl

Medium fidelity aircraft-propulsion system design and optimization.
https://mit-lae.github.io/TASOPT.jl/
MIT License
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Floor sizing bug in `fusew` #68

Closed askprash closed 1 month ago

askprash commented 1 month ago

Noticed this when I started cleaning up the fusew function and the fuselage structures here #57. This line here sets the max shear stress allowable in the floor beams to be equal to the maximum bending stress: https://github.com/MIT-LAE/TASOPT.jl/blob/b02a90b58c2cf9cad655b204cd9c015a57d5623e/src/structures/fuseW.jl#L147 This seems to have been carried over from the FORTRAN code.

Most Al alloys have notably lower shear strength $\tau{max} < \sigma{max}$ This must be making the floors webs considerably thinner and therefore the floor weight is probably lower than it should be.

@ngomezve / @aditeyashukla does this make sense? Or am I missing something?

Fixing in #57

aditeyashukla commented 1 month ago

Makes perfect sense - I noticed this too but thought it was just taking a rough estimate. I think it should be super easy to make it accurate now as we have material properties for the floor accessible/editable