My worry would not be the initial bulge. That while interesting is no big
deal until either some air gets under the edge or the pressure on the dzus
button is more that the panel will take and the button rips through the
panel. Using the stiffener approach while keeping the panel from flexing
does not take into account the pressure trying to pull the panel off the
car. If stiffeners would keep the panel from flexing completely would you
just run 4 buttons, one on each corner and not worry about the PSI on the
button?
Dave
> -----Original Message-----
> From: owner-land-speed@Autox.Team.Net
> [mailto:owner-land-speed@Autox.Team.Net]On Behalf Of John Burk
> Sent: Tuesday, December 28, 2004 2:07 PM
> To: land-speed@Autox.Team.Net
> Subject: Re : Dzus Spacing
>
>
> Dave and Mayf - If air pressure makes a flat panel bulge 1/8"
> over a 13" span
> no yielding has occured - All alloys of alumimum are equaly
> elastic so if the
> panels were 1100 or 7075 they would both bulge the same amount - I hate to
> double the number of Dzus buttons so I think riveting a stiffener on the
> inside is the best - Was just wondering what button spacing
> others would use
> in this area of low pressure - Dave I daily use my copy of
> Machinerys Handbook
> but I have better information on propertys of metals .
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