{"id":389475,"date":"2024-10-14T11:12:53","date_gmt":"2024-10-14T11:12:53","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/389475\/"},"modified":"2024-10-14T11:12:53","modified_gmt":"2024-10-14T11:12:53","slug":"389475","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/389475\/","title":{"rendered":"Reply To: Solution combination give me a lower stress than the static case one"},"content":{"rendered":"<p>&lt;p&gt;Hello Dlooman,&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Thank you for your answer!&lt;br&gt;&lt;br&gt;&lt;\/p&gt;&lt;p&gt;I understand what you mean about the real and imaginary parts, but if I extract the stress at a specific frequency and phase (136.21 Hz and 81&ordm;, for example), which I have identified as the moment when the maximum equivalent von Mises stress occurs, I wouldn&rsquo;t have the issue of the result having both real and imaginary parts, right? If that&rsquo;s not what you mean when you say it&rsquo;s the same to compare static stress with harmonic stress, what are you referring to?&lt;\/p&gt;&lt;p&gt;On the other hand, I think I understand your example about the sigma components and the importance of their signs in the von Mises equivalent stress. Therefore, I understand that the Solution Combination applies the Linear or SRSS method to the normal and shear stress components for each node, and then with the result of that, it calculates the equivalent von Mises stress (if I request it). Is that correct?&lt;br&gt;&lt;br&gt;On the other hand, I have performed another combination of the results, this time using the linear method. The final result is much closer to what I would expect, that is, to the static analysis in terms of maximum values of von mises stress. As can be seen in the image below, the stress distribution below 180 MPa is very similar in both solutions, only the high stress values change. Does this mean it is more appropriate to perform the combination using the linear method for static and harmonic?&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/14-10-2024-1728904131-mceclip1.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-389475","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=\"Hello Dlooman, Thank you for your answer!I understand what you mean about the real and imaginary parts, but if I extract the stress at a specific frequency and phase (136.21 Hz and 81\u00ba, for example), which I have identified as the moment when the maximum equivalent von Mises stress occurs, I wouldn\u2019t have the issue of\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" 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