{"id":458769,"date":"2026-05-24T20:17:07","date_gmt":"2026-05-24T20:17:07","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/strain-energy-output-mat_add_erosion\/"},"modified":"2026-05-24T20:17:07","modified_gmt":"2026-05-24T20:17:07","slug":"strain-energy-output-mat_add_erosion","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/strain-energy-output-mat_add_erosion\/","title":{"rendered":"Strain Energy Output &#8211; *MAT_ADD_EROSION"},"content":{"rendered":"<p>&lt;p class=&#8221;isSelectedEnd&#8221;&gt;Hi everyone,&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;I am running a windshield impactor test in LS-DYNA using&nbsp;&lt;code dir=&#8221;ltr&#8221;&gt;*MAT_ELASTIC<\/code> glass shell elements with &lt;code dir=&#8221;ltr&#8221;&gt;*MAT_ADD_EROSION<\/code>.&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;The erosion card includes a critical stress, critical strain energy, and critical radius. My understanding is that when a glass element reaches the critical stress, LS-DYNA evaluates the accumulated strain energy within the specified radius around that element. If this accumulated strain energy exceeds the critical energy, the related elements are eroded.&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;For my study, I want to keep the critical energy very high so that erosion does not occur, and I want to post-process the time history of this&nbsp; accumulated strain energy during the windshield impact.&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;However, I cannot find this quantity in the output. I can only see part-level &lt;code dir=&#8221;ltr&#8221;&gt;internal_energy<\/code> from &lt;code dir=&#8221;ltr&#8221;&gt;MATSUM<\/code>, but this is not the local&nbsp; strain energy I need.&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;How can I get this strain energy output in LS-DYNA?&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;Thank you&lt;\/p&gt;&lt;p class=&#8221;isSelectedEnd&#8221;&gt;Ali&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-458769","topic","type-topic","status-publish","hentry","topic-tag-erosion-1","topic-tag-failure","topic-tag-failure-criteria","topic-tag-strain-energy-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27814"],"_bbp_topic_id":["458769"],"_bbp_subscription":["691341","58821"],"_bbp_author_ip":["2a02:8071:51e1:a9e0:a140:411d:2a1d:2b84"],"_bbp_last_reply_id":["458816"],"_bbp_last_active_id":["458816"],"_bbp_last_active_time":["2026-05-25 14:30:01"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["691341","58821"],"_btv_view_count":["84"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1779653984:691341"]},"test":"alikuryanhotmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/458769","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/458769\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=458769"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}