HyperSizer Support Forum
Engineering & Analysis Methods => Miscellaneous Analysis & Methods => Topic started by: HyperSizer User on December 18, 2008, 10:17:09 AM
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I was looking at a single circular tube, fixing one end and loading the other. On the user loads entry place, I could put in moments and axial load, but could not enter a value for V1 or V2. When I click on it, it acts like I’m supposed to choose something, but it’s blank. What am I doing wrong?
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Beam shear forces are dependent on beam moments because the two are not independent of each other. HyperSizer assumes a constant shear force in a beam and a linear variation of bending moment. The constant shear force in a beam is calculated from:
V = ( M(end B) – M(end A) ) / Length
It sounds like you are loading the beam up as a cantilevered beam, therefore, the bending moment on end B would be zero and to get the shear you want, set
M(end A) = - V *Length
So, for a shear force of V = 10 lb on a 30” beam, set M(end A) = - (10) * (30) = -300 lb-in, M(end B) = 0, and the Length to 30”. Analyze, and you should see a V value of 10 lb.
Let me know if you have more questions.