Jim Katen Posted August 20, 2010 Report Share Posted August 20, 2010 I'm having a hard time coming up with a correct term. Let's say you have a wing nut. When you turn it, you exert (mostly) even forces on each wing. Now suppose that one of the wings has broken off. When you turn it, you now exert a lateral force in addition to a rotational one. What's the term for this unbalanced force? I thought of eccentric, but it seems like there's a better one out there. - Jim Katen, Oregon Quote Link to comment Share on other sites More sharing options...
Rob Amaral Posted August 20, 2010 Report Share Posted August 20, 2010 That's what I would use... eccentric... Quote Link to comment Share on other sites More sharing options...
Erby Posted August 20, 2010 Report Share Posted August 20, 2010 Google "eccentric lateral force". It's used quite a bit. Quote Link to comment Share on other sites More sharing options...
Mark P Posted August 20, 2010 Report Share Posted August 20, 2010 Wobbly Quote Link to comment Share on other sites More sharing options...
fyrmnk Posted August 20, 2010 Report Share Posted August 20, 2010 Torsional? Wouldn't that apply whether it's equal force or not? Shear could also be used in conjuction with it maybe. Quote Link to comment Share on other sites More sharing options...
kurt Posted August 20, 2010 Report Share Posted August 20, 2010 What's the specific problem? Quote Link to comment Share on other sites More sharing options...
Jim Morrison Posted August 20, 2010 Report Share Posted August 20, 2010 I think most people would understand 'eccentric'. There may be a more accurate term, but depending on who your audience is, they mightn't understand it. Quote Link to comment Share on other sites More sharing options...
Marc Posted August 20, 2010 Report Share Posted August 20, 2010 I'm having a hard time coming up with a correct term. Let's say you have a wing nut. When you turn it, you exert (mostly) even forces on each wing. Now suppose that one of the wings has broken off. When you turn it, you now exert a lateral force in addition to a rotational one. What's the term for this unbalanced force? I thought of eccentric, but it seems like there's a better one out there. - Jim Katen, Oregon It's a torque either way. With an unbroken wing nut, the torque is generated by twin symmetrical force vectors or twin mechanical moments. With one wing broken, the torque is generated by a single force vector and friction force. At least that's what I think. Marc Quote Link to comment Share on other sites More sharing options...
Chris Bernhardt Posted August 20, 2010 Report Share Posted August 20, 2010 Now suppose that one of the wings has broken off. When you turn it, you now exert a lateral force in addition to a rotational one. What's the term for this unbalanced force? I thought of eccentric, but it seems like there's a better one out there. I wouldn't call it eccentric, since to me that conotes how it moves about center, and my grandmother would have no idea what I was talking about. If I had a situation where force had been applied evenly in rotation, I would tell my grandma that the force is now applied unevenly, which will cause a problem, i.e. vibration, out of roundness, etc. Chris, Oregon Quote Link to comment Share on other sites More sharing options...
Rob Amaral Posted August 20, 2010 Report Share Posted August 20, 2010 The real answer is 'whatever the Scarecrow said' (after he got his diploma from the fake Wizard...) ! Quote Link to comment Share on other sites More sharing options...
Richard Moore Posted August 20, 2010 Report Share Posted August 20, 2010 Let's say you have a wing nut. When you turn it, you exert (mostly) even forces on each wing. Now suppose that one of the wings has broken off. When you turn it, you now exert a lateral force in addition to a rotational one. Isn't that effectively what happens when you apply a torque wrench (actually any single handled wrench) to a nut? The unmoving bolt creates the pivot point and forces the lateral movement of the wrench to become rotational...but there's still an uneven force being applied. So I'm going to go with "off-centered torque". Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted August 21, 2010 Report Share Posted August 21, 2010 The wingnut is broken, replace it. I'm suprised I have to explain this. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted August 21, 2010 Author Report Share Posted August 21, 2010 The wingnut is broken, replace it. I'm suprised I have to explain this. Good answer. But it's not the answer to the question I asked. This has almost nothing to do with home inspections by the way. It's just a pure question with no application. A long series of sychronized events got me to thinking about it and wondering what word would describe it. Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted August 21, 2010 Report Share Posted August 21, 2010 Am I the only one that can't come up with something that doesn't use the words "spinny thingie"? Quote Link to comment Share on other sites More sharing options...
kurt Posted August 21, 2010 Report Share Posted August 21, 2010 Couple is a vector quantity where you have a moment arm and an applied force. It is sometimes described as torque, but it's a little different, I think. It could be applied along with eccentric, but only mechanical engineers would know what you're talking about. Quote Link to comment Share on other sites More sharing options...
John Kogel Posted August 22, 2010 Report Share Posted August 22, 2010 Sheesh, you guys, it's a plain old "Lop-sided wingnut". But Jim, it sounds like you are describing a "crank", something Grandma would understand very well. [] Quote Link to comment Share on other sites More sharing options...
mgbinspect Posted August 22, 2010 Report Share Posted August 22, 2010 The force is single moment. The resulting momentary flex and twist, which will vary with the material, is the result of torsion. Does a torsion bar on vehicle cover pretty well all of the foces you're dealing with? (I noticed after posting that Kevin had already mentioned "torsional", but discounted it. Actually, torsion, by definition, does seem to best describe all of the forces and variables, though. Since the axis is not fixed, the torsion will be momentary and tough to calculate.) Quote Link to comment Share on other sites More sharing options...
hausdok Posted August 23, 2010 Report Share Posted August 23, 2010 Cattywompus OT - OF!!! M. Quote Link to comment Share on other sites More sharing options...
mgbinspect Posted August 23, 2010 Report Share Posted August 23, 2010 Cattywompus OT - OF!!! M. Wow! That's certainly the best slang for it so far - pretty much a home run. [:-thumbu] Quote Link to comment Share on other sites More sharing options...
Hearthman Posted August 23, 2010 Report Share Posted August 23, 2010 tangential rotational torsion due to a lack of bilaterally balanced torque resulting in the feces impacting on the rotary oscillating convection blower. Quote Link to comment Share on other sites More sharing options...
Erby Posted August 23, 2010 Report Share Posted August 23, 2010 Really odd, where some of these conversations go! 0- Quote Link to comment Share on other sites More sharing options...
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