{"id":43402,"date":"2020-04-29T11:58:56","date_gmt":"2020-04-29T11:58:56","guid":{"rendered":"\/forum\/forums\/topic\/type-of-load-to-find-out-fatigue-life-of-a-component\/"},"modified":"2020-04-29T11:58:56","modified_gmt":"2020-04-29T11:58:56","slug":"type-of-load-to-find-out-fatigue-life-of-a-component","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/type-of-load-to-find-out-fatigue-life-of-a-component\/","title":{"rendered":"Type of load to find out fatigue life of a component"},"content":{"rendered":"<p style=\"box-sizing: border-box; margin: 0px 0px 10px; font-size: 15px; overflow-x: hidden; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-style: italic;\">I have a bent tube. One end is supposed to be fixed. A sinusoidally varying load is to be applied on the other end. I need to compute the fatigue life of the full component.<\/p>\n<p><\/p>\n<p style=\"box-sizing: border-box; margin: 0px 0px 10px; font-size: 15px; overflow-x: hidden; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-style: italic;\">I have a few doubts regarding applying the load. In my case, I am applying a remote force.The load should reverse from &#8211; to +. I have inserted the fatigue tool and defined fully reversed loading.&nbsp;<\/p>\n<p><\/p>\n<p style=\"box-sizing: border-box; margin: 0px 0px 10px; font-size: 15px; overflow-x: hidden; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-style: italic;\">The sinusoidally varying load function is 15000*sin(31.41592*time). The frequency of the load is 5Hz. The amplitude of the load is 15000N. Since I have already mentioned &#8216;fully reversed&#8217; loading in the fatigue tool, which sort of load should I apply?<br style=\"box-sizing: border-box;\"><br style=\"box-sizing: border-box;\">(a) constant load with load amplitude of 15000N:<\/p>\n<p><\/p>\n<p style=\"box-sizing: border-box; margin: 0px 0px 10px; font-size: 15px; overflow-x: hidden; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-style: italic;\"><img decoding=\"async\" style=\"box-sizing: border-box; border: 0px; vertical-align: middle; max-width: 100%;\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/f7d92b1d-2e5c-42b0-9259-aba900bb5ec6\/86751734-52c4-4c06-8f92-abaa006e5382_img1.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p style=\"box-sizing: border-box; margin: 0px 0px 10px; font-size: 15px; overflow-x: hidden; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-style: italic;\">or (b) function load 15000*sin(31.41592*time):<\/p>\n<p><\/p>\n<p style=\"box-sizing: border-box; margin: 0px 0px 10px; font-size: 15px; overflow-x: hidden; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-style: italic;\"><img decoding=\"async\" style=\"box-sizing: border-box; border: 0px; vertical-align: middle; max-width: 100%;\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/f7d92b1d-2e5c-42b0-9259-aba900bb5ec6\/a7e22a17-ab44-401d-8bde-abaa006e678a_img2.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p style=\"box-sizing: border-box; margin: 0px 0px 10px; font-size: 15px; overflow-x: hidden; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-style: italic;\">&nbsp;Also, since my frequency of the fully reversed loading is 5Hz, I have defined under &#8216;Life units&#8217; that &#8216;units name&#8217; is &#8216;seconds&#8217; and that 1 cycle is equal to 0.2 seconds (basically accounting for the 5Hz condition). Is this the right approach?<\/p>\n<p><\/p>\n<p style=\"box-sizing: border-box; margin: 0px; font-size: 15px; overflow-x: hidden; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-style: italic;\"><img decoding=\"async\" style=\"box-sizing: border-box; border: 0px; vertical-align: middle; max-width: 100%;\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/f7d92b1d-2e5c-42b0-9259-aba900bb5ec6\/1b60b5e1-422d-4e24-865f-abaa006f7046_img3.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-43402","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["15583"],"_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":["757"],"_bbp_subscription":["250487"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["43402"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","176322"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["113186"],"_bbp_last_active_id":["113186"],"_bbp_last_active_time":["2020-05-01 11:27:41"]},"test":"99siddharth99"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/43402","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\/43402\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=43402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}