View Poll Results: Should DarkOnion be banned from the SCIC section?
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Should DarkOnion be banned from SCIC?
Registered User
iTrader: (1)
Joined: Jan 2003
Posts: 4,682
From: Union City/San Diego, CA USA
Car Info: The Thundercougarfalconbird
oh ya. One of my friends at work asked me to analyze one of the parts that another forum member analyzed. It was a rear suspension cross brace of some sort. To make a long story short, it was terribly done almost to the point of misleading people. It was done in a Finite Element model and it looked fancy, but the constraints were all done wrong, the model showed that the part would basically fail (450000psi stresses would fail titanium) and the stress contours looked way off...
Registered User
iTrader: (1)
Joined: Jan 2003
Posts: 4,682
From: Union City/San Diego, CA USA
Car Info: The Thundercougarfalconbird
Well the maximum von-mises stress (which is a yield criterion) was showing 450,000 psi. Yield is where the metal deforms and is unable to return to its original state. So permanently deformed. The Ultimate Tensile strength (or the point of breakage) of titanium (your run of the mill 6Al-4V) is 130,000 psi. Ya. Something was wrong with their analysis... I can't say how much their part can take because the analysis was done wrong.
Something Custom
iTrader: (9)
Joined: Aug 2003
Posts: 14,505
From: Las Vegas NV
Car Info: 2018 Grand Cherokee Limited Ecodiesel EOC Stage 1










