# Talk:Shearing (physics)

Latest comment: 5 years ago by 2602:306:CFCE:1EE0:4432:55D:B636:8FF0 in topic Basics & Presumptions: Lead & intro

## Mergeing

I oppose the mergeing of this article with shear centre, since the shear centre is a very important topic in heavy engineering and is not explained by this physics article - --77.99.25.138 (talk) 20:58, 28 November 2007 (UTC)

## The shear center=center of twist???

The shear center is determined by statics (forces, stresses); the center of twist is a kinematic characteristics. Imagine a cantilever beam with a thin-walled channel section. If pure torque is applied on the free end, the beam should only undergo pure twisting. Yet if the shear center is the center of twist the section would be rotated either above or below its original position when twisting about the shear center. This would mean the beam is either bent up- or downward.

If we are defining the center of twist to be a point where we measure how much the section is rotating (i.e. the angle of twist), then it should be the centroid.222.153.234.213 (talk) 14:56, 5 May 2009 (UTC)

## Basics & Presumptions: Lead & intro

Like most people, I arrived here on a Wiki lazy link, and found the article wanting: —confusing jargonish gibberish. The problem, like most similar (usually technical) articles seems to be the authors making unwarranted presumptions about the reader (in violation of wiki guidelines which says; write to the average person MOS:LEAD).

I am Joe Average. While the title is "Shearing (physics)," this means nothing to me since I am unaware there is more than one kind of shearing. To most people, "shear" is a verb, NOT a noun. This not being explained, —me not doing the required unlearning,— all I see is gibberish.

```"Shearing (manufacturing), a metalworking process which cuts stock without the formation of chips or the use of burning or melting"   "Shear (sheet metal), various tools to shear sheet metal."
```

verb 1. cut the wool off (a sheep or other animal). 2. break off or cause to break off, owing to a structural strain. "the derailleur sheared and jammed in the rear wheel"
noun 1. a strain in the structure of a substance produced by pressure, when its layers are laterally shifted in relation to each other.

I hope somebody will make this most basic clarification. An explanation is not a list of facts & truisms, it usually requires much more thought. See also the rules of communication.