Workbench Mechanical - Introduction to Contact
Workbench Mechanical - Introduction to Contact
Workbench Mechanical - Introduction to Contact
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<strong>Workbench</strong> <strong>Mechanical</strong> - <strong>Introduction</strong> <strong>to</strong> <strong>Contact</strong><br />
... <strong>Contact</strong> Formulations<br />
Training Manual<br />
• The main difference between Pure Penalty and Augmented Lagrange<br />
methods is that the latter augments the contact force (pressure)<br />
calculations:<br />
Pure Penalty:<br />
Augmented Lagrange:<br />
F = k<br />
F<br />
normal<br />
normal<br />
normal<br />
x<br />
penetration<br />
= knormal<br />
x<br />
penetratio n<br />
+ λ<br />
• Because of the extra term λ, the augmented Lagrange method is less<br />
sensitive <strong>to</strong> the magnitude of the contact stiffness k normal .<br />
ANSYS, Inc. Proprietary<br />
© 2009 ANSYS, Inc. All rights reserved.<br />
3-6<br />
April 30, 2009<br />
Inven<strong>to</strong>ry #002659
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