{"id":363807,"date":"2024-04-23T17:58:53","date_gmt":"2024-04-23T17:58:53","guid":{"rendered":"\/forum\/forums\/reply\/363807\/"},"modified":"2024-04-23T17:58:53","modified_gmt":"2024-04-23T17:58:53","slug":"363807","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/363807\/","title":{"rendered":"Reply To: Strain Life Fatigue Analysis"},"content":{"rendered":"<p>&lt;p class=&#8221;MsoNormal&#8221;&gt;Whichever one you want.&lt;span style=&#8221;mso-spacerun: yes;&#8221;&gt;&nbsp; &lt;\/span&gt;By numerical fatigue calculation standards, they are essentially the same result.&lt;span style=&#8221;mso-spacerun: yes;&#8221;&gt;&nbsp; &lt;\/span&gt;You always should consider fatigue results in a statistical sense.&lt;span style=&#8221;mso-spacerun: yes;&#8221;&gt;&nbsp; &lt;\/span&gt;There is never one correct answer.&lt;span style=&#8221;mso-spacerun: yes;&#8221;&gt;&nbsp; &lt;\/span&gt;There is a range of correct answers depending on factors such as how comprehensive the fatigue test data is, how well known the applied loading is, how precisely the surface effects are known, etc.&lt;span style=&#8221;mso-spacerun: yes;&#8221;&gt;&nbsp; &lt;\/span&gt;Most commercial design codes apply a large factor of safety on the calculated fatigue life to encompass the known unknowns and the inherent statistical variance.&lt;\/p&gt;&lt;p class=&#8221;MsoNormal&#8221;&gt;EN is generally considered to be more mathematically precise than SN, but often the SN test data is more comprehensive, so it can be more accurate.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-363807","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Whichever one you want. 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