139votes15replies3.1Kviews
A practical checklist for reviewing someone else's FEA report
What to actually look for when you are asked to sign off an analysis you did not run.
- FEA
- peer review
- verification
- simulation
Questions with real model settings in them, case studies with the failure included, and discussions about where design assistance ends and professional sign-off begins. Standards are cited by clause, never reproduced.
Post the model, the load case and what you have already ruled out. Questions that state the assumptions get answered in hours; questions that state only the symptom get answered in days.
What to actually look for when you are asked to sign off an analysis you did not run.
Grade B suite holds its differentials in steady state but loses them under simultaneous door opening. Modelled room by room, which I now think was the mistake.
Two failures, three investigations, and the actual root cause was in the heat treatment chart nobody had cross-checked against the section thickness.
ASME Y14.5 assumes subtractive manufacturing in a lot of places. What datum schemes are actually working for printed parts?
Model predicts failure at the right location but at 1.6× the observed cycle count. Is that correlated or not?
Every project starts with one. I am not convinced anyone opens it until something goes wrong.
Lenders increasingly want the loss tree itemised. Are the headline exceedance numbers doing any work anymore?
4-layer board, signals referenced to a plane that is split under the BGA escape. Trying to work out if I need to respin.
Two robots, a positioner and a load station in an 11 × 8 m bay with a 180 A supply limit and a works council to convince.
Bearing and settlement are comfortable at every position. Stiffness is the binding constraint at nine of fourteen. Sanity check requested.
Remote engineering work crosses jurisdictions constantly. The boundary matters and it is not always drawn clearly.
First submission came back with 34 comments, mostly presentational rather than technical. There must be a better way.
The itemised breakdown lenders actually ask for, with the justification column that saves the second round of queries.
What the numbers in a site investigation report will and will not support.
Six-storey RCC frame, regular plan. Under the seismic combination one interior column shows net tension. Nothing about the geometry suggests it should.
