Talk:Necking (engineering)

Who understands this
This is completely incomprehensible for someone who reads a necking explanation for the first time: "As the material deforms, all locations undergo approximately the same amount of strain as long as it hardens more than its cross-sectional area decreases, as shown at small draw ratios in the top diagram and at all draw ratios in the bottom. But if the material begins to harden by a smaller proportion than the decrease in cross-sectional area, as indicated by the first tangent point in the top diagram, strain concentrates at the location of highest stress or lowest hardness. The greater the local strain, the greater the local decrease in cross-sectional area, which in turn causes even more concentration of strain, leading to an instability that causes the formation of a neck. This instability is called "geometric" or "extrinsic" because it involves the material's macroscopic decrease in cross-sectional area." Can someone rewrite it??? — Preceding unsigned comment added by 136.8.33.71 (talk) 13:38, 22 January 2016 (UTC)

Reworking article
I redid this page from scratch. Incorporated original reference as well as a few important ones that describe the pertinent concepts. Photo is gas-pipe-grade MDPE. Also included a concise but (I hope) instructive discussion of how and why the phenomenon occurs.

Also made it less metals-centric and removed fracture mechanics aspects that belong elsewhere.

Crosslink (talk) 03:20, 21 February 2009 (UTC)


 * I just upgraded the assessment to start-class. If you have any questions or want a higher rating, leave me a message on my talk page. -- Explodicle (T/C) 15:01, 23 February 2009 (UTC)


 * Sounds about right for now. Thanks! Crosslink (talk) 21:41, 23 February 2009 (UTC)

I made a couple of small edits: Considère has a grave accent (not acute), and UK English spelling of "behaviour" in one of the references. —Preceding unsigned comment added by 86.9.207.88 (talk) 21:58, 3 January 2010 (UTC)