{"id":37802,"date":"2019-09-19T15:06:32","date_gmt":"2019-09-19T15:06:32","guid":{"rendered":"\/forum\/forums\/topic\/evaluation-of-stiffness-matrix-at-iteration-ith-newton-raphson-method\/"},"modified":"2019-09-19T15:06:32","modified_gmt":"2019-09-19T15:06:32","slug":"evaluation-of-stiffness-matrix-at-iteration-ith-newton-raphson-method","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/evaluation-of-stiffness-matrix-at-iteration-ith-newton-raphson-method\/","title":{"rendered":"Evaluation of stiffness matrix at iteration ith &#8211; Newton-Raphson method"},"content":{"rendered":"<p>Hello everyone,<\/p>\n<p><\/p>\n<p>I&#8217;d like to know how Ansys computes the stiffness matrix at point x1 in figure. I&#8217;m studying the way in which Ansys uses the Newton-Raphson method when there are nonlinearities.<\/p>\n<p><\/p>\n<p>In the slide there is the specification that we don&#8217;t know the real curve F-x, thus I have some problem to understand which slope is taken at x1 by Ansys.<\/p>\n<p><\/p>\n<p>Thank you so much for your time.<img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/51c33382-71dc-41be-8455-aa190172d73d\/d9471785-c91e-48a0-bd11-aacd00f8f079_0.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-37802","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["9980"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["452"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["37802"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","897","163749"],"_bbp_voice_count":["3"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["94702"],"_bbp_last_active_id":["94702"],"_bbp_last_active_time":["2019-09-23 07:38:12"]},"test":"gennaro"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/37802","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\/37802\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=37802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}