|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
04-22-2016, 09:51 AM | #141 |
Senior Member
Join Date: May 2010
Location: Central Iowa
Posts: 701
|
Re: Gravity bends a crank?
I got side-tracked at work one day and decided to ran a quick finite element analysis on a 5.7L SBC crankshaft to determine the amount of deflection that occurs when its stored in various orientations. The CAD geometry was simplified - features that would not affect the analysis were removed - to reduce processing time, but was taken directly from a GM-supplied model.
Four conditions were modeled, with gravitational force being the only force acting on the crankshaft. Steel with the following properties was selected as the material. Things to note about the images:
Conditions Modeled:
As you can see, even in the worst condition (vertical storage), the maximum amount of deflection that occurs is in the hundred thousandths. This is less than the accuracy that can be measured by nearly all micrometers. It would be fair to assume that a Flathead crankshaft would exhibit similar behavior. So, in conclusion, store the crankshaft however you feel fit. If you want to store it vertically to save space, do that. If you want to store it horizontally to prevent damage from tipping over, do that.
__________________
Mike Wanted: - '32-34 Open Cab Pickup (RPU) parts and documents/articles/info - ARDUN parts Last edited by itslow; 04-22-2016 at 10:02 AM. |
04-22-2016, 09:54 AM | #142 |
Senior Member
Join Date: May 2010
Location: Central Iowa
Posts: 701
|
Re: Gravity bends a crank?
I also, for sh!ts and giggles, ran a simulation where the crankshaft is only supported by the center main journal. I'm not even sure how one would store a crank this way, but here's the plot:
In this case, you can see the max deflection is still in the ten thousandths.
__________________
Mike Wanted: - '32-34 Open Cab Pickup (RPU) parts and documents/articles/info - ARDUN parts |
Sponsored Links (Register now to hide all advertisements) |
|
04-22-2016, 10:29 AM | #143 |
Senior Member
Join Date: Jul 2013
Location: Sacramento, CA
Posts: 368
|
Re: Gravity bends a crank?
Hardly news...Molly's known this all along...she's seen straight crankshafts in every position imaginable.
|
04-22-2016, 10:41 AM | #144 |
Senior Member
Join Date: May 2010
Location: Canada Where it snows
Posts: 2,058
|
Re: Gravity bends a crank?
Yup
|
04-22-2016, 02:52 PM | #145 |
Senior Member
|
Re: Gravity bends a crank?
yup - therya go - real fart smellers
|
04-22-2016, 02:57 PM | #146 |
Senior Member
Join Date: Apr 2016
Location: ohio
Posts: 147
|
Re: Gravity bends a crank?
Sponsored Links (Register now to hide all advertisements)
|
04-22-2016, 03:15 PM | #147 |
Senior Member
Join Date: May 2010
Location: North Dakota
Posts: 1,632
|
Re: Gravity bends a crank?
Just you wait. That tidbit will be released to bring car guys into the fold.
"Nowwww letmebeclear. Ahhh, climatechange ahhhh, willbendyourcrank ahhh burnupyourcoil and ahhh ruinyourshocks. Thedebate ahhh isover!"
__________________
I dig coal, which provides motivation for EVs. Last edited by 1952henry; 04-23-2016 at 04:17 PM. |
|
|
Sponsored Links (Register now to hide all advertisements) |
|