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[Xansys] [struct] Stress-Strain Curve with negative slope
 
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ayo.brimmo
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Joined: 01 Jul 2013
Posts: 38
Location: Masdar City, Abu Dhabi

PostPosted: Tue Apr 15, 2014 7:04 am  Reply with quote

Hi,

In the regional ANSYS conference held in Dubai last year, one of the presenters claimed to have modeled a material with a strain-stress curve which included the necking region (negative slope). According to the materials reference, "No segment on the stress-strain curve can have a slope less than zero" and I pointed this out to him during his presentation but he was adamant that the negative slope was modeled on ANSYS. In order not to drag it for too long, we agreed to meet after the session but I never saw this guy again. Unfortunately, this presentation wasn't in the original schedule and he was presenting just because someone else drop out at the last minute so I have no means of tracking him.

So my questions:
- Is there a material property model that can handle a negative stress-strain slope?
- If yes, has anyone successfully used it?
- Though a long shot, did anyone on this list make such presentation?

Best,
Ayo Brimmo
Masdar, UAE


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Ayo Brimmo
Research Engineer
Masdar Institute of Science and Technology
UAE.
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