{"id":29546,"date":"2018-06-21T13:56:52","date_gmt":"2018-06-21T13:56:52","guid":{"rendered":"\/forum\/forums\/topic\/fill-up-the-curve-of-nonlinear-material\/"},"modified":"2018-06-21T13:56:52","modified_gmt":"2018-06-21T13:56:52","slug":"fill-up-the-curve-of-nonlinear-material","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fill-up-the-curve-of-nonlinear-material\/","title":{"rendered":"Fill up the curve of nonlinear material"},"content":{"rendered":"<p>Hi everyone,<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>I did simple analysis of c. beam. I used nonlinear material, PA GF15. I converted engineering stress and strain to true.<\/p>\n<p><\/p>\n<p>In the results I did not get <span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\">corresponding curve of stress strain.<br \/><\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\"><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/bd1970d7-f461-4b91-ae8c-a8e9007ffbbb\/a73f565b-cf53-467a-a0e3-a90600e38533_screenshot-2.jpg?width=690&amp;upscale=false\" alt=\"\"><\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\">red &#8211; Eng. stress-strain,<\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\">black &#8211; True stress-strain,<\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\">blue &#8211; the result stress-total strain.<\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\">I wanted to determine max. Force which should be occur in max. stress (in the above pic. it is about 120MPa.), but the result of stress and strain <\/span><\/span><span class=\"short_text\" lang=\"en\"><span class=\"\"><span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\">behave as linear not as nonlinear, which is needed. <br \/><\/span><\/span><\/span><\/span><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\">I sent the data sheet of material and the archive file of the analysis.<\/span><\/span><\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\">Whether I have determined Young module correct.<br \/><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/bd1970d7-f461-4b91-ae8c-a8e9007ffbbb\/d6729ea1-d7b8-4e3c-80fd-a90600f4ef00_screenshot-1.jpg?width=690&amp;upscale=false\" alt=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\">In the pic. above I used PA GF15 plastic material for more <\/span><\/span><\/span><\/span><\/span><\/span><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\">complex geometry where is used tetrahedron elements but green curve is result of stress strain, but blue is <\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\"><span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\">entered<\/span><\/span> as bilinear isotropic hardening. As the pic shows the results do not <\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\"><span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\"><span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\">respond the input data stress and strain of plastic material.<br \/><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><\/p>\n<p><span class=\"short_text\" lang=\"en\"><span class=\"\"><span class=\"short_text\" lang=\"en\"><span class=\"\">If&nbsp; anyone&nbsp; has an idea about this, pleas tell me.<\/span><\/span><\/span><\/span><\/p>\n<p><\/p>\n<p><span id=\"result_box\" class=\"short_text\" lang=\"en\"><span class=\"\">All the best good people!!!<\/span><\/span><\/p>\n","protected":false},"template":"","class_list":["post-29546","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["1715"],"_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":["1","1","1","1","1"],"_btv_view_count":["2927"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["29546"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","157108"],"_bbp_voice_count":["2"],"_bbp_reply_count":["9"],"_bbp_last_reply_id":["59907"],"_bbp_last_active_id":["59907"],"_bbp_last_active_time":["2018-06-28 09:39:36"],"_bbp_notification_enabled":["258"]},"test":"adisa"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/29546","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\/29546\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=29546"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}