Workbench Mechanical â Metal Plasticity
Workbench Mechanical â Metal Plasticity
Workbench Mechanical â Metal Plasticity
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<strong>Workbench</strong> <strong>Mechanical</strong> – <strong>Metal</strong> <strong>Plasticity</strong><br />
… Yield Criterion<br />
Training Manual<br />
• The von Mises yield criterion predicts that yielding will occur<br />
whenever the distortion energy in a unit volume equals the<br />
distortion energy in the same volume when uniaxially stressed to<br />
the yield strength.<br />
– From this theory, a scalar invariant (von Mises equivalent stress) is<br />
derived as:<br />
<br />
e<br />
<br />
1<br />
2<br />
2<br />
2<br />
<br />
<br />
<br />
<br />
<br />
1<br />
2<br />
2<br />
3<br />
3<br />
1<br />
2<br />
<br />
• When von Mises equivalent stress exceeds the uniaxial material<br />
yield strength, general yielding will occur.<br />
ANSYS, Inc. Proprietary<br />
© 2009 ANSYS, Inc. All rights reserved.<br />
5-10<br />
April 30, 2009<br />
Inventory #002659
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