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| Jack... |
 Posted: Fri Oct 16, 2009 10:29 am |
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How can I calculate the compression load factor for a 1 inch aluminum
tube, 049-065 wall thickness |
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| dlzc... |
| Posted: Fri Oct 16, 2009 11:02 am |
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| brian whatcott... |
| Posted: Mon Oct 19, 2009 3:53 am |
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Jack wrote:
[quote]How can I calculate the compression load factor for a 1 inch aluminum
tube, 049-065 wall thickness
[/quote]
For metals the load to yield is much the same in compression or in
tension. You find the area of the cross-section and multiply with the
yield strength. But a column in compression doesn't usually fail this
way. It fails in buckling. The criterion here is slenderness ratio.
If its no more than 20 times as long as its diameter, it won't fail in
buckling (usually) and conditionally, columns (or struts, same
difference) can hold up at slenderness ratios up to 80:1.
The key is No Side Loads At All. All Loads Through The Long Axis.
Brian W |
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| Fred Osim... |
| Posted: Wed Oct 21, 2009 9:39 pm |
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the load on the tube has a lot to do with their end conditions, whether it
is simply connected or moment connected, and how it is loaded. for just
compression, stress equals force over area. for buckling,
Pcr=pi^2EI/(KL)^2. if K=1, both ends are pinned, if both ends are rigidly
clamped, K=.5. if one end is clamped and the other end is pinned, K=.7. if
the columned is cantilever and loaded at free end, K=2.
reference: statics and mechanics of materials by nash, schaum's outline.
from fred.
but <advanced at (no spam) gci.net> wrote in message
news:d8b18d2f-17ff-4c7d-a306-143161f54389 at (no spam) s21g2000prm.googlegroups.com...
[quote]How can I calculate the compression load factor for a 1 inch aluminum
tube, 049-065 wall thickness[/quote] |
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