Engineering question
11-21-2001, 06:10 PM
#11
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[QUOTE]Originally posted by thehoner
[B]
Btw Mingster, at least your questions are getting a bit more complicated - beams are a little more complex than the circumference of a circle.
[B]
Btw Mingster, at least your questions are getting a bit more complicated - beams are a little more complex than the circumference of a circle.
11-21-2001, 06:39 PM
#12
Originally posted by RandyP
Yes, Hollow is great unless you are using it as a club
Also, I'm not sure that there are any shear strength gains from hollow.
Yes, Hollow is great unless you are using it as a club
Also, I'm not sure that there are any shear strength gains from hollow.
Serious brainiacs around these parts
The not so involved answer is the hollow is weaker than the solid if the outside dimensions and the material are identical, but the hollow is also way lighter for the same strength if you are not constrained in the outside dimension. Make the tube very slightly larger in OD as compared to the solid and you will have the same torsional rigidity with significantly less weight. This of course hold true to a point, you get to aluminum can thinness and other sh!t starts playing a factor
You're talking sway bars in particular, yes?
11-22-2001, 05:24 AM
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One thing to remember, is that the manufacturing process used to create a hollow bar can also produce more strength given the same material than a solid cast bar.
Then you also have the material that it's made of - that will also make a difference.
Then you also have the joints/attachments. ie why have a stiff bar but an attachment that has play?
As someone pointed, it depends on what you mean by stronger - shear, bending, torsion/twist etc.
Then you also have the material that it's made of - that will also make a difference.
Then you also have the joints/attachments. ie why have a stiff bar but an attachment that has play?
As someone pointed, it depends on what you mean by stronger - shear, bending, torsion/twist etc.
11-24-2001, 06:17 AM
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One big plus for hollow is the ability to cost-effectively use high strength alloys (i.e. much less material weight and plus management of material costs). For example the availability of chrome-moly tubing is excellent and the physical characteristics such as yield, tensile, etc. are greatly improved as compared to carbon steel.
An interesting link is http://www.efunda.com/home.cfm. Take a look at the strength data for steel versus alloy steel. Beware, you will have to move fairly quickly through the menus since the free look doesn't last long since this is a subscriber site. It times out in a couple of minutes.
An interesting link is http://www.efunda.com/home.cfm. Take a look at the strength data for steel versus alloy steel. Beware, you will have to move fairly quickly through the menus since the free look doesn't last long since this is a subscriber site. It times out in a couple of minutes.
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