{"id":32948,"date":"2019-01-29T15:38:35","date_gmt":"2019-01-29T15:38:35","guid":{"rendered":"\/forum\/forums\/topic\/how-to-input-true-stress-when-the-stress-falls\/"},"modified":"2019-01-29T15:38:35","modified_gmt":"2019-01-29T15:38:35","slug":"how-to-input-true-stress-when-the-stress-falls","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-input-true-stress-when-the-stress-falls\/","title":{"rendered":"How to input true stress, when the stress falls"},"content":{"rendered":"<p>Hello anyone,<\/p>\n<p><\/p>\n<p>I have the experimental date of PC material (plastic), from tensile test I got force-displacement, when It converted in the engineering and true stress, I got that the true stress falls. As we know that in Ansys can not be input decreasing stress, can anyone help me with this problem.<\/p>\n<p><\/p>\n<p>First I think that this true stress strain use for the pipe specimen with diameter of 12,5mm, Where I need the max force which pipe can endure during tensile test. And I got that is about 1800N as in the below pic.<\/p>\n<p><\/p>\n<p>Second I think to use true stress strain for drop test, where need to determine when&nbsp; the plate (500x500x15) will break (when strain is about 1mm\/mm) if on it drops the sphere of 0,5kg.&nbsp;&nbsp; The plate is of the same material as the pipe, PC.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/bd1970d7-f461-4b91-ae8c-a8e9007ffbbb\/c3fafbfe-4434-4eab-88f8-a9e400fdf6dd_force-displacement.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-32948","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["5120"],"_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","0","0","0","0"],"_btv_view_count":["1395"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["32948"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","157108"],"_bbp_voice_count":["2"],"_bbp_reply_count":["10"],"_bbp_last_reply_id":["76970"],"_bbp_last_active_id":["76970"],"_bbp_last_active_time":["2019-02-06 10:46:32"]},"test":"adisa"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/32948","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\/32948\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=32948"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}