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I had a blade on my fan just bend and tear up the radiator. Never seen that happen before. I've got plenty of clearance and the motor is tied down.
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Re: What would cause a fan blade to fail?
Posted by:
JimmieD
(66.81.28.---)
Posts: 1,090
Posts: 1,090
Date: July 03, 2009 11:37PM
The metal wouldn't necessarily get soft after being bent out of shape only one time. It may get progressively weaker as it is bent repeatedly, but only one bend may not noticeably weaken, at least to the point of being able to feel it with your hands.
In addition one can't know what the normal resistance to bending is unless a good blade is also bent, so it's impossible to tell if the one blade is seriously weakend compared to others that are untested.
There are only three possible causes: a mechanical force applied in some way, or metal fatigue, or both.
Magnafluxing or other processes are required to positively show metal fatigue before a failure, or to analyze the cause of a failure due to metal fatigue.
I'd still count the neighborhood cats, see if one is missing or walking funny, maybe the one with the short tail and the chronic twitch....
Edited 1 time(s). Last edit at 07/03/2009 11:38PM by JimmieD.
In addition one can't know what the normal resistance to bending is unless a good blade is also bent, so it's impossible to tell if the one blade is seriously weakend compared to others that are untested.
There are only three possible causes: a mechanical force applied in some way, or metal fatigue, or both.
Magnafluxing or other processes are required to positively show metal fatigue before a failure, or to analyze the cause of a failure due to metal fatigue.
I'd still count the neighborhood cats, see if one is missing or walking funny, maybe the one with the short tail and the chronic twitch....
Edited 1 time(s). Last edit at 07/03/2009 11:38PM by JimmieD.
