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ERESX

Testi Riccardo

Tue, Aug 6, 2024 9:47 AM

Best regards
Riccardo Testi

Development and Strategies
2 Wheeler Engines Technical Centre
Piaggio & C. S.p.A
Viale Rinaldo Piaggio, 25
56025 Pontedera (Pisa) - ITALY
Phone: +39 0587 272850
Fax: +39 0587 272010
Mobile: +39 339 7241918
E-mail: riccardo.testi@piaggio.com mailto:riccardo.testi@piaggio.com

Dear Sirs, the Theory Manual states that SOLID187s have 4 integration points. Would you mind letting me know whether that means that issuing ERESX,NO provides the user with stress data at the corner nodes only? Thank you very much Best regards Riccardo Testi --- Development and Strategies 2 Wheeler Engines Technical Centre Piaggio & C. S.p.A Viale Rinaldo Piaggio, 25 56025 Pontedera (Pisa) - ITALY Phone: +39 0587 272850 Fax: +39 0587 272010 Mobile: +39 339 7241918 E-mail: riccardo.testi@piaggio.com<mailto:riccardo.testi@piaggio.com>

Matthew Ridzon, PE

Tue, Aug 6, 2024 12:59 PM

Your question isn't totally clear. There is typically no need to issue this command.

Please understand the mathematics of an element, which is broken down in graduate-level numerical analysis courses. The solution takes place across the element at Gauss integration points using numerical techniques. In other words, the solution does not take place directly at the nodes. The data from the integration points is then extrapolated or copied to the nearby nodes.

Typically, there is no need to issue ERESX since it happens seamlessly behind the scenes. If a model is linear, it will extrapolate the data from the Gauss integration points to the nodes. If a model is nonlinear, it will copy the data from the Gauss integration points to the nodes. The software is able to auto-detect if it is linear or nonlinear. The ANSYS "Intro to Basic Structural Nonlinearities" course, Lecture 2, breaks this down pretty nicely.

-Matt

-----Original Message-----
From: Testi Riccardo via Xansys xansys-temp@list.xansys.org
Sent: Tuesday, August 6, 2024 5:47 AM
To: xansys-temp@list.xansys.org
Cc: Testi Riccardo riccardo.testi@piaggio.com
Subject: [Xansys] ERESX

Best regards
Riccardo Testi

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Your question isn't totally clear. There is typically no need to issue this command. Please understand the mathematics of an element, which is broken down in graduate-level numerical analysis courses. The solution takes place across the element at Gauss integration points using numerical techniques. In other words, the solution does not take place directly at the nodes. The data from the integration points is then extrapolated or copied to the nearby nodes. Typically, there is no need to issue ERESX since it happens seamlessly behind the scenes. If a model is linear, it will extrapolate the data from the Gauss integration points to the nodes. If a model is nonlinear, it will copy the data from the Gauss integration points to the nodes. The software is able to auto-detect if it is linear or nonlinear. The ANSYS "Intro to Basic Structural Nonlinearities" course, Lecture 2, breaks this down pretty nicely. -Matt -----Original Message----- From: Testi Riccardo via Xansys <xansys-temp@list.xansys.org> Sent: Tuesday, August 6, 2024 5:47 AM To: xansys-temp@list.xansys.org Cc: Testi Riccardo <riccardo.testi@piaggio.com> Subject: [Xansys] ERESX Dear Sirs, the Theory Manual states that SOLID187s have 4 integration points. Would you mind letting me know whether that means that issuing ERESX,NO provides the user with stress data at the corner nodes only? Thank you very much Best regards Riccardo Testi --- Development and Strategies 2 Wheeler Engines Technical Centre Piaggio & C. S.p.A Viale Rinaldo Piaggio, 25 56025 Pontedera (Pisa) - ITALY Phone: +39 0587 272850 Fax: +39 0587 272010 Mobile: +39 339 7241918 E-mail: riccardo.testi@piaggio.com<mailto:riccardo.testi@piaggio.com> _______________________________________________ Xansys mailing list -- xansys-temp@list.xansys.org To unsubscribe send an email to xansys-temp-leave@list.xansys.org If you are receiving too many emails from XANSYS please consider changing account settings to Digest mode which will send a single email per day. Please send administrative requests such as deletion from XANSYS to xansys-mod@tynecomp.co.uk and not to the list