{"id":170779,"date":"2023-06-05T07:05:07","date_gmt":"2023-06-05T07:05:07","guid":{"rendered":"\/knowledge\/forums\/topic\/is-normal-lagrange-nl-contact-better-than-augmented-lagrange-al-pure-penalty-pp-approach-2\/"},"modified":"2023-07-31T12:33:45","modified_gmt":"2023-07-31T12:33:45","slug":"is-normal-lagrange-nl-contact-better-than-augmented-lagrange-al-pure-penalty-pp-approach-2","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/is-normal-lagrange-nl-contact-better-than-augmented-lagrange-al-pure-penalty-pp-approach-2\/","title":{"rendered":"Is Normal Lagrange (NL) contact  better than Augmented Lagrange (AL) \/ Pure Penalty (PP) approach?"},"content":{"rendered":"<p>The Normal Lagrange contact formulation, unlike penalty methods, does not use the contact stiffness for calculating contact forces. This formulation enforces a stronger constraint on contact penetration compared to the penalty methods. Therefore, it may be useful in applications where element penetration is to be mitigated. Also, it is preferred over penalty methods for line-surface and point-line\/surface contacts.<\/p>\n","protected":false},"template":"","class_list":["post-170779","topic","type-topic","status-publish","hentry","topic-tag-18-1","topic-tag-general","topic-tag-mechanical","topic-tag-structural-mechanics"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"The Normal Lagrange contact formulation, unlike penalty methods, does not use the contact stiffness for calculating contact forces. This formulation enforces a stronger constraint on contact penetration compared to the penalty methods. Therefore, it may be useful in applications where element penetration is to be mitigated. Also, it is preferred over penalty methods for line-surface\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/is-normal-lagrange-nl-contact-better-than-augmented-lagrange-al-pure-penalty-pp-approach-2\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Knowledge | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Is Normal Lagrange (NL) contact better than Augmented Lagrange (AL) \/ Pure Penalty (PP) approach? | Ansys Knowledge\" \/>\n\t\t<meta property=\"og:description\" content=\"The Normal Lagrange contact formulation, unlike penalty methods, does not use the contact stiffness for calculating contact forces. 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