Thank you very much for the insight provided already. I will confess to being ignorant of shear deformation. Must be something not taught in general mechanical engineering curriculum. We have some CE's around here and will consult there library of books for more information. Is there any...
I don't have the exact numbers with me, but it was a simply supported beam (approx 3 feet in length) with point load applied at mid-span. Load is applied downward on the top part of the flange. The equation used for maximum deflection was ymax = -PL^3/(48EI). Material is A36. I have calc...
I work at a community college and doing some bending beam experiments for student labs. When doing simply supported beam deflection calculations and measurements, I am seeing some inconsistent data that I cannot explain.
If I test a basic cross sectional shape (square, rectangle, tube), I get...
I am advising a group of college students on the development of a electical motor/combustion engine hybrid vehicle project. We are all very new to this field.
I am looking for textbook and resource recommendations to educate ourselves in this technology.
As mechanical engineers, I am...
I am developing an intranet website for our engineering department and would like to include a section on helpful websites for engineers...things like online calculators, design resources, standards..etc. We are mainly mechanical engineers and do alot of machine design with motion control...
I am developing an intranet website for our engineering department and would like to include a section on helpful websites for engineers...things like online calculators, design resources, standards..etc. We are mainly mechanical engineers and do alot of machine design with motion control...
Goto this website to download a crude model of a human.<br><br><A HREF="http://www.neprouser.org/Tips-Tricks/tips.htm" TARGET="_new">http://www.neprouser.org/Tips-Tricks/tips.htm</A><br><br>I have no idea if its meets the detail that you need though. PTC also offers a human factors...
If you have access to the fan blade outside of the assembly, there is an experimental way of determining the moment of Inertia. It is often used to measure the inertia of motor rotor assemblies. In fact the procedure is described nicely in the NEMA standard for...
The above answers are good ball park numbers. If you have a particular grade of steel, check the following online site for more definite numbers:<br>
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<A HREF="http://www.matweb.com/" TARGET="_new">http://www.matweb.com/</A><br>
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They also have many more material properties for...
I presently do not have a copy, but I have always consulted a book titled "Roark's Formulas for Stress and Strain" for these types of problems. I do not recall if it covers sphere's, but it is very comprehensive and a great book to have if you do lots of stress/strain calculations...
I am doing rotor interia calculations for some rotor assemblies in a brushless DC motor. In the past I have always ignored any effect due to front and rear bearings. I am beginning to question this assumption. Does anyone know if this a valid assumption, and if not, some insight on how to...
Not sure what t/r is (tube thickness to tube radius ration?), but here's what I would do:<br>
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In tension: Stress(s) = Axial Load(P)/Area(A), so if you know your stress level, solve for A. This is the area of the tube and would be equal to 0.25*PI(Do^2-Di^2). You will need to pick the...
Does anyone know of some internet resources defining NEMA motor frame sizes (i.e. physical dimensions for bolt patterns, shaft size etc)? Some searching around on general purpose search engines did not prove successful.<br>
To solve the steady state problem from temperature initial to temp final, you should be able to get a reasonable answer by just doing an energy balance. Check any college physics book for some good examples. Equations will something of the form:<br>
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heat from water=heat to ice +...
