{"id":394773,"date":"2024-11-21T12:58:00","date_gmt":"2024-11-21T12:58:00","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/moment-reaction-probe-with-large-deformation\/"},"modified":"2025-09-22T08:54:07","modified_gmt":"2025-09-22T08:54:07","slug":"moment-reaction-probe-with-large-deformation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/moment-reaction-probe-with-large-deformation\/","title":{"rendered":"Moment Reaction probe with Large deformation"},"content":{"rendered":"<p>&lt;p&gt;Hi,&nbsp;&lt;\/p&gt;&lt;p&gt;I would like to read the reaction moment probe from the contact in a large displacement analysis. When I use the summation method: orientation system or centroid, the moment is read relative to the undisplaced centroid of the contact. I need the summation point to be at the centroid of the displaced contact. Is there any way to do this automatically? The only solution I have found is to move the coordinate system exactly by the value the geometry moves, but this is too labor-intensive to do for many&nbsp;contacts and many timesteps.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;When the summation point does not move with the mesh, this results in a false reading of the moments.&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/21-11-2024-1732193809-mceclip3.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/11\/21-11-2024-1732193847-mceclip4.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-394773","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi, I would like to read the reaction moment probe from the contact in a large displacement analysis. 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When I use the summation method: orientation system or centroid, the moment is read relative to the undisplaced centroid of the contact. I need the summation point to be at the centroid of the displaced contact. 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