{"id":166872,"date":"2023-04-05T14:32:17","date_gmt":"2023-04-05T14:32:17","guid":{"rendered":"\/knowledge\/forums\/topic\/why-is-a-crack-assigned-a-new-material-id\/"},"modified":"2023-07-31T12:32:10","modified_gmt":"2023-07-31T12:32:10","slug":"why-is-a-crack-assigned-a-new-material-id","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-is-a-crack-assigned-a-new-material-id\/","title":{"rendered":"Why is a crack assigned a new material ID?"},"content":{"rendered":"<p>From the command from the example in the documentation (&#8220;tb, cgcr, 2, , , PARIS&#8221;).  Cracks are usually assigned a different material ID from the underlying material for at least two reasons:  a) it&#8217;s easier from a user&#8217;s standpoint to separate crack parameters as a separate material ID for bookkeeping purposes (e.g., material ID 1 is material, material ID 2 are crack parameters) similar to how we may assign a different material ID for contact (friction), even though contact occurs on the surface of the material  b) if a user has more than 1 crack present (e.g., 2 cracks in different locations), we need 2 different material IDs &#8211; one for each crack &#8211; and using separate material IDs may be easier to track<\/p>\n","protected":false},"template":"","class_list":["post-166872","topic","type-topic","status-publish","hentry","topic-tag-4391","topic-tag-fracture","topic-tag-general","topic-tag-mechanical","topic-tag-structural-mechanics"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["5\/4\/2023 20:20"],"_bbp_forum_id":["27789"],"_bbp_author_ip":["209.182.204.162"],"_btv_view_count":["307"],"siebel_km_number":["2054213"],"product_version":["19"],"km_published_date":["2018-04-19T00:00:00.000Z"],"family":["Structural Mechanics"],"application_name":["Mechanical"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/166872","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/166872\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=166872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}