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Re: Von Mises Allowable Stress

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On Jan 23, 2006, at 1:55 PM, Chance, Acie wrote:

Besides being careful can anyone explain what is wrong with the above arguments for using 0.75Fy as the allowable stress.
Substantially nothing, provided you aren't dealing with possible instability and the stress was pure bending (no inplane compression). If your case were a plate supported on stiffeners underneath, you'd probably need to consider it with stiffened or unstiffened flange criteria.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 1864)

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