Empathy List Archives

FP

Francesca Pistorio

Sun, Dec 18, 2022 3:30 PM

Good morning,

I would like to apply a bending moment to a beam modelled with solid elements. However, solid elements have only ux, uy and uz DOFs.

Actually, I’m interested in the stress stae caused by the bending moment and I have also tried to apply it to each node using the “sf” command. Unfortunately, I did not obtain the correct result.

Is there a way to solve this problem?

Thank you for your time and help.

Francesca

Student at Politecnico di Torino

Good morning, I would like to apply a bending moment to a beam modelled with solid elements. However, solid elements have only ux, uy and uz DOFs. Actually, I’m interested in the stress stae caused by the bending moment and I have also tried to apply it to each node using the “sf” command. Unfortunately, I did not obtain the correct result. Is there a way to solve this problem? Thank you for your time and help. Francesca Student at Politecnico di Torino

CW

Christopher Wright

Sun, Dec 18, 2022 4:24 PM

On Dec 18, 2022, at 9:30 AM, Francesca Pistorio francesca.pistorio@polito.it wrote:

Is there a way to solve this problem?

Yes. But you need to explain in logical detail what you've actually done and how—logically—you know something is wrong and how you've tried to fix it. No one can possibly diagnose the problem because you haven't actually explained what the problem is.

Give some thought to posing the question properly—so you don't keep wasting your time and everyone else's. Describe what you've done in detail; explain what exactly made you decide you've screwed up and measures you've taken to fix it. A problem this simple with a closed form solution is trivial—chances are the mistake is obvious and equally trivial.

Christopher Wright P.E. (ret'd) |"They couldn't hit an elephant at
chrisw@skypoint.com | this distance" (last words of Gen.
http://www.skypoint.com/members/chrisw/ | John Sedgwick, Spotsylvania (1864)

> On Dec 18, 2022, at 9:30 AM, Francesca Pistorio <francesca.pistorio@polito.it> wrote: > > Is there a way to solve this problem? Yes. But you need to explain in logical detail what you've actually done and how—logically—you know something is wrong and how you've tried to fix it. No one can possibly diagnose the problem because you haven't actually explained what the problem is. Give some thought to posing the question properly—so you don't keep wasting your time and everyone else's. Describe what you've done in detail; explain what exactly made you decide you've screwed up and measures you've taken to fix it. A problem this simple with a closed form solution is trivial—chances are the mistake is obvious and equally trivial. Christopher Wright P.E. (ret'd) |"They couldn't hit an elephant at chrisw@skypoint.com | this distance" (last words of Gen. http://www.skypoint.com/members/chrisw/ | John Sedgwick, Spotsylvania (1864)

FP

Francesca Pistorio

Sun, Dec 18, 2022 5:28 PM

I’m sorry for the lack of clarity. I would try to explain the problem better.

I would like to model a beam subjected to a certain bending moment "M". I’m interested in the stress state caused by the bending moment M. I’m trying to solve a fracture mechanics problem, so I could just get the stress from this bending moment.

In addition, I need to use solid elements (eg solid186). However, the problem is that solid elements do not have rotational degrees of freedom so I cannot directly apply a bending moment M.

From the beam theory, I can indirectly calculate the stress due to the bending moment and apply it as pressure using the command "sf". In particular this stress is proportional to the coordinate "z" (which is the coordinate along the thickness of the beam).

Therefore, I created a *do cycle, and applied the same pressure to all nodes with the same z-coordinate. So the stress will be:

stress=coefficient (from the beam theory)*z-coordinate

My analysis doesn’t converge and I think this depends on how I’m applying the pressure using the sf command.

I hope you can give me some suggestions.

Thank you for your help and time.

Francesca
Student at Politecnico di Torino

Inviato da Postahttps://go.microsoft.com/fwlink/?LinkId=550986 per Windows

Da: Francesca Pistoriomailto:francesca.pistorio@polito.it
Inviato: domenica 18 dicembre 2022 16:30
A: xansys-temp@list.xansys.org mailto:xansys-temp@list.xansys.org
Oggetto: [STRUCT] Bending moment and solid elements

Good morning,

I would like to apply a bending moment to a beam modelled with solid elements. However, solid elements have only ux, uy and uz DOFs.

Actually, I’m interested in the stress stae caused by the bending moment and I have also tried to apply it to each node using the “sf” command. Unfortunately, I did not obtain the correct result.

Is there a way to solve this problem?

Thank you for your time and help.

Francesca

Student at Politecnico di Torino

I’m sorry for the lack of clarity. I would try to explain the problem better. I would like to model a beam subjected to a certain bending moment "M". I’m interested in the stress state caused by the bending moment M. I’m trying to solve a fracture mechanics problem, so I could just get the stress from this bending moment. In addition, I need to use solid elements (eg solid186). However, the problem is that solid elements do not have rotational degrees of freedom so I cannot directly apply a bending moment M. From the beam theory, I can indirectly calculate the stress due to the bending moment and apply it as pressure using the command "sf". In particular this stress is proportional to the coordinate "z" (which is the coordinate along the thickness of the beam). Therefore, I created a *do cycle, and applied the same pressure to all nodes with the same z-coordinate. So the stress will be: stress=coefficient (from the beam theory)*z-coordinate My analysis doesn’t converge and I think this depends on how I’m applying the pressure using the sf command. I hope you can give me some suggestions. Thank you for your help and time. Francesca Student at Politecnico di Torino Inviato da Posta<https://go.microsoft.com/fwlink/?LinkId=550986> per Windows Da: Francesca Pistorio<mailto:francesca.pistorio@polito.it> Inviato: domenica 18 dicembre 2022 16:30 A: xansys-temp@list.xansys.org<mailto:xansys-temp@list.xansys.org> Oggetto: [STRUCT] Bending moment and solid elements Good morning, I would like to apply a bending moment to a beam modelled with solid elements. However, solid elements have only ux, uy and uz DOFs. Actually, I’m interested in the stress stae caused by the bending moment and I have also tried to apply it to each node using the “sf” command. Unfortunately, I did not obtain the correct result. Is there a way to solve this problem? Thank you for your time and help. Francesca Student at Politecnico di Torino

NH

Nelson Ho

Sun, Dec 18, 2022 9:02 PM

Hello Francesca,

You can apply a bending moment via an RBE3 from a pilot node which will
transfer the rot dofs.

For your pressure situation you can try using a table via the *dim
function. Tabulate the pressures with respect to the z coordinate. Ansys
use this table as an index to interpolate between your inputs in your *do
loop.

Thanks,
Nelson

On Sun, Dec 18, 2022 at 9:28 AM Francesca Pistorio <
francesca.pistorio@polito.it> wrote:

I’m sorry for the lack of clarity. I would try to explain the problem
better.

I would like to model a beam subjected to a certain bending moment "M".
I’m interested in the stress state caused by the bending moment M. I’m
trying to solve a fracture mechanics problem, so I could just get the
stress from this bending moment.

In addition, I need to use solid elements (eg solid186). However, the
problem is that solid elements do not have rotational degrees of freedom so
I cannot directly apply a bending moment M.

From the beam theory, I can indirectly calculate the stress due to the
bending moment and apply it as pressure using the command "sf". In
particular this stress is proportional to the coordinate "z" (which is the
coordinate along the thickness of the beam).

Therefore, I created a *do cycle, and applied the same pressure to all
nodes with the same z-coordinate. So the stress will be:

stress=coefficient (from the beam theory)*z-coordinate

My analysis doesn’t converge and I think this depends on how I’m applying
the pressure using the sf command.

I hope you can give me some suggestions.

Thank you for your help and time.

Francesca
Student at Politecnico di Torino

Inviato da Postahttps://go.microsoft.com/fwlink/?LinkId=550986 per
Windows

Da: Francesca Pistoriomailto:francesca.pistorio@polito.it
Inviato: domenica 18 dicembre 2022 16:30
A: xansys-temp@list.xansys.org mailto:xansys-temp@list.xansys.org
Oggetto: [STRUCT] Bending moment and solid elements

Good morning,

I would like to apply a bending moment to a beam modelled with solid
elements. However, solid elements have only ux, uy and uz DOFs.

Actually, I’m interested in the stress stae caused by the bending moment
and I have also tried to apply it to each node using the “sf” command.
Unfortunately, I did not obtain the correct result.

Is there a way to solve this problem?

Thank you for your time and help.

Francesca

Student at Politecnico di Torino

Xansys mailing list -- xansys-temp@list.xansys.org
To unsubscribe send an email to xansys-temp-leave@list.xansys.org
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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

Hello Francesca, You can apply a bending moment via an RBE3 from a pilot node which will transfer the rot dofs. For your pressure situation you can try using a table via the *dim function. Tabulate the pressures with respect to the z coordinate. Ansys use this table as an index to interpolate between your inputs in your *do loop. Thanks, Nelson On Sun, Dec 18, 2022 at 9:28 AM Francesca Pistorio < francesca.pistorio@polito.it> wrote: > I’m sorry for the lack of clarity. I would try to explain the problem > better. > > I would like to model a beam subjected to a certain bending moment "M". > I’m interested in the stress state caused by the bending moment M. I’m > trying to solve a fracture mechanics problem, so I could just get the > stress from this bending moment. > > In addition, I need to use solid elements (eg solid186). However, the > problem is that solid elements do not have rotational degrees of freedom so > I cannot directly apply a bending moment M. > > From the beam theory, I can indirectly calculate the stress due to the > bending moment and apply it as pressure using the command "sf". In > particular this stress is proportional to the coordinate "z" (which is the > coordinate along the thickness of the beam). > > Therefore, I created a *do cycle, and applied the same pressure to all > nodes with the same z-coordinate. So the stress will be: > > stress=coefficient (from the beam theory)*z-coordinate > > My analysis doesn’t converge and I think this depends on how I’m applying > the pressure using the sf command. > > I hope you can give me some suggestions. > > > Thank you for your help and time. > > Francesca > Student at Politecnico di Torino > > Inviato da Posta<https://go.microsoft.com/fwlink/?LinkId=550986> per > Windows > > Da: Francesca Pistorio<mailto:francesca.pistorio@polito.it> > Inviato: domenica 18 dicembre 2022 16:30 > A: xansys-temp@list.xansys.org<mailto:xansys-temp@list.xansys.org> > Oggetto: [STRUCT] Bending moment and solid elements > > > Good morning, > > I would like to apply a bending moment to a beam modelled with solid > elements. However, solid elements have only ux, uy and uz DOFs. > > > > Actually, I’m interested in the stress stae caused by the bending moment > and I have also tried to apply it to each node using the “sf” command. > Unfortunately, I did not obtain the correct result. > > > > Is there a way to solve this problem? > > > > Thank you for your time and help. > > > > Francesca > > Student at Politecnico di Torino > > _______________________________________________ > 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 >

MG

Mohammad Gharaibeh

Sun, Dec 18, 2022 9:10 PM

You can try applying a force perpendicular to the beam axis. This force
must result in a bending moment that is equal to what you intend to apply
(moment=force*distance). I recommend to apply the force on nodes - maybe on
one node.

Can you mention what boundary conditions you have? You might need to plot a
shear-moment diagram first to understand how you should be applying the
force/moment.

On Sunday, December 18, 2022, Francesca Pistorio <
francesca.pistorio@polito.it> wrote:

Good morning,

I would like to apply a bending moment to a beam modelled with solid
elements. However, solid elements have only ux, uy and uz DOFs.

Actually, I’m interested in the stress stae caused by the bending moment
and I have also tried to apply it to each node using the “sf” command.
Unfortunately, I did not obtain the correct result.

Is there a way to solve this problem?

Thank you for your time and help.

Francesca

Student at Politecnico di Torino

Xansys mailing list -- xansys-temp@list.xansys.org
To unsubscribe send an email to xansys-temp-leave@list.xansys.org
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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

--

---====
Mohammad A Gharaibeh, Ph.D.
Associate Professor
Department of Mechanical Engineering
The Hashemite University
P.O. Box 330127
Zarqa, 13133, Jordan
Tel: +962 - 5 - 390 3333 Ext. 4771
Fax: +962 - 5 - 382 6348

---====

You can try applying a force perpendicular to the beam axis. This force must result in a bending moment that is equal to what you intend to apply (moment=force*distance). I recommend to apply the force on nodes - maybe on one node. Can you mention what boundary conditions you have? You might need to plot a shear-moment diagram first to understand how you should be applying the force/moment. On Sunday, December 18, 2022, Francesca Pistorio < francesca.pistorio@polito.it> wrote: > Good morning, > > I would like to apply a bending moment to a beam modelled with solid > elements. However, solid elements have only ux, uy and uz DOFs. > > > > Actually, I’m interested in the stress stae caused by the bending moment > and I have also tried to apply it to each node using the “sf” command. > Unfortunately, I did not obtain the correct result. > > > > Is there a way to solve this problem? > > > > Thank you for your time and help. > > > > Francesca > > Student at Politecnico di Torino > _______________________________________________ > 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 > -- ===================================== Mohammad A Gharaibeh, Ph.D. Associate Professor Department of Mechanical Engineering The Hashemite University P.O. Box 330127 Zarqa, 13133, Jordan Tel: +962 - 5 - 390 3333 Ext. 4771 Fax: +962 - 5 - 382 6348 =====================================

TR

Testi Riccardo

Mon, Dec 19, 2022 7:45 AM

Dear Ms. Pistorio,
if you are using the Workbench environment, you might apply a moment to the surface you are willing to load.
If you are using the Mechanical APDL (Cliassic) GUI, you might use the RBE3 command, just as Mr. Ho suggested.

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

-----Original Message-----
From: Francesca Pistorio francesca.pistorio@polito.it
Sent: domenica 18 dicembre 2022 18:29
To: xansys-temp@list.xansys.org
Subject: [Xansys] R: [STRUCT] Bending moment and solid elements

CAUTION:This email originated from outside the Piaggio Group. Do not click links or open attachments unless you recognize the sender and know the content is safe.

I'm sorry for the lack of clarity. I would try to explain the problem better.

I would like to model a beam subjected to a certain bending moment "M". I'm interested in the stress state caused by the bending moment M. I'm trying to solve a fracture mechanics problem, so I could just get the stress from this bending moment.

In addition, I need to use solid elements (eg solid186). However, the problem is that solid elements do not have rotational degrees of freedom so I cannot directly apply a bending moment M.

From the beam theory, I can indirectly calculate the stress due to the bending moment and apply it as pressure using the command "sf". In particular this stress is proportional to the coordinate "z" (which is the coordinate along the thickness of the beam).

Therefore, I created a *do cycle, and applied the same pressure to all nodes with the same z-coordinate. So the stress will be:

stress=coefficient (from the beam theory)*z-coordinate

My analysis doesn't converge and I think this depends on how I'm applying the pressure using the sf command.

I hope you can give me some suggestions.

Thank you for your help and time.

Francesca
Student at Politecnico di Torino

Inviato da Posta< https://urlsand.esvalabs.com/?u=https%3A%2F%2Fgo.microsoft.com%2Ffwlink%2F%3FLinkId%3D550986&e=e5c82b6b&h=b4dc83db&f=y&p=y > per Windows

Da: Francesca Pistoriomailto:francesca.pistorio@polito.it
Inviato: domenica 18 dicembre 2022 16:30
A: xansys-temp@list.xansys.org mailto:xansys-temp@list.xansys.org
Oggetto: [STRUCT] Bending moment and solid elements

Good morning,

I would like to apply a bending moment to a beam modelled with solid elements. However, solid elements have only ux, uy and uz DOFs.

Actually, I'm interested in the stress stae caused by the bending moment and I have also tried to apply it to each node using the "sf" command. Unfortunately, I did not obtain the correct result.

Is there a way to solve this problem?

Thank you for your time and help.

Francesca

Student at Politecnico di Torino

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

Dear Ms. Pistorio, if you are using the Workbench environment, you might apply a moment to the surface you are willing to load. If you are using the Mechanical APDL (Cliassic) GUI, you might use the RBE3 command, just as Mr. Ho suggested. 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 -----Original Message----- From: Francesca Pistorio <francesca.pistorio@polito.it> Sent: domenica 18 dicembre 2022 18:29 To: xansys-temp@list.xansys.org Subject: [Xansys] R: [STRUCT] Bending moment and solid elements CAUTION:This email originated from outside the Piaggio Group. Do not click links or open attachments unless you recognize the sender and know the content is safe. I'm sorry for the lack of clarity. I would try to explain the problem better. I would like to model a beam subjected to a certain bending moment "M". I'm interested in the stress state caused by the bending moment M. I'm trying to solve a fracture mechanics problem, so I could just get the stress from this bending moment. In addition, I need to use solid elements (eg solid186). However, the problem is that solid elements do not have rotational degrees of freedom so I cannot directly apply a bending moment M. From the beam theory, I can indirectly calculate the stress due to the bending moment and apply it as pressure using the command "sf". In particular this stress is proportional to the coordinate "z" (which is the coordinate along the thickness of the beam). Therefore, I created a *do cycle, and applied the same pressure to all nodes with the same z-coordinate. So the stress will be: stress=coefficient (from the beam theory)*z-coordinate My analysis doesn't converge and I think this depends on how I'm applying the pressure using the sf command. I hope you can give me some suggestions. Thank you for your help and time. Francesca Student at Politecnico di Torino Inviato da Posta< https://urlsand.esvalabs.com/?u=https%3A%2F%2Fgo.microsoft.com%2Ffwlink%2F%3FLinkId%3D550986&e=e5c82b6b&h=b4dc83db&f=y&p=y > per Windows Da: Francesca Pistorio<mailto:francesca.pistorio@polito.it> Inviato: domenica 18 dicembre 2022 16:30 A: xansys-temp@list.xansys.org<mailto:xansys-temp@list.xansys.org> Oggetto: [STRUCT] Bending moment and solid elements Good morning, I would like to apply a bending moment to a beam modelled with solid elements. However, solid elements have only ux, uy and uz DOFs. Actually, I'm interested in the stress stae caused by the bending moment and I have also tried to apply it to each node using the "sf" command. Unfortunately, I did not obtain the correct result. Is there a way to solve this problem? Thank you for your time and help. Francesca Student at Politecnico di Torino _______________________________________________ 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

HC

Helio Carlos Bortolon

Mon, Dec 19, 2022 9:46 AM

Greetings,

Have you tried to use a Remote Point in the solid face corresponding to the beam's extremity, and then to apply the moment to the RP?

HTH

Hélio C. Bortolon

PÚBLICA

-----Mensagem original-----
De: Francesca Pistorio francesca.pistorio@polito.it
Enviada em: domingo, 18 de dezembro de 2022 12:30
Para: xansys-temp@list.xansys.org
Assunto: [Xansys] [STRUCT] Bending moment and solid elements

[Geralmente, você não obtém emails de francesca.pistorio@polito.it. Saiba por que isso é importante em https://aka.ms/LearnAboutSenderIdentification ]

Good morning,

I would like to apply a bending moment to a beam modelled with solid elements. However, solid elements have only ux, uy and uz DOFs.

Actually, I'm interested in the stress stae caused by the bending moment and I have also tried to apply it to each node using the "sf" command. Unfortunately, I did not obtain the correct result.

Is there a way to solve this problem?

Thank you for your time and help.

Francesca

Student at Politecnico di Torino

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
O emitente desta mensagem é responsável por seu conteúdo e endereçamento e deve observar as normas internas da Petrobras. Cabe ao destinatário assegurar que as informações e dados pessoais contidos neste correio eletrônico somente sejam utilizados com o grau de sigilo adequado e em conformidade com a legislação de proteção de dados e privacidade aplicável. A utilização das informações e dados pessoais contidos neste correio eletrônico em desconformidade com as normas aplicáveis acarretará a aplicação das sanções cabíveis.

The sender of this message is responsible for its content and address and must comply with Petrobras' internal rules. It is up to the recipient to ensure that the information and personal data contained in this email are only used with the appropriate degree of confidentiality and in compliance with applicable data protection and privacy legislation. The use of the information and personal data contained in this e-mail in violation of the applicable rules will result in the application of the applicable sanctions.

El remitente de este mensaje es responsable por su contenido y dirección y debe cumplir con las normas internas de Petrobras. Corresponde al destinatario asegurarse de que la información y los datos personales contenidos en este correo electrónico solo se utilicen con el grado adecuado de confidencialidad y de conformidad con la legislación aplicable en materia de privacidad y protección de datos. El uso de la información y datos personales contenidos en este correo electrónico en contravención de las normas aplicables dará lugar a la aplicación de las sanciones correspondientes.

Greetings, Have you tried to use a Remote Point in the solid face corresponding to the beam's extremity, and then to apply the moment to the RP? HTH Hélio C. Bortolon PÚBLICA -----Mensagem original----- De: Francesca Pistorio <francesca.pistorio@polito.it> Enviada em: domingo, 18 de dezembro de 2022 12:30 Para: xansys-temp@list.xansys.org Assunto: [Xansys] [STRUCT] Bending moment and solid elements [Geralmente, você não obtém emails de francesca.pistorio@polito.it. Saiba por que isso é importante em https://aka.ms/LearnAboutSenderIdentification ] Good morning, I would like to apply a bending moment to a beam modelled with solid elements. However, solid elements have only ux, uy and uz DOFs. Actually, I'm interested in the stress stae caused by the bending moment and I have also tried to apply it to each node using the "sf" command. Unfortunately, I did not obtain the correct result. Is there a way to solve this problem? Thank you for your time and help. Francesca Student at Politecnico di Torino _______________________________________________ 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 O emitente desta mensagem é responsável por seu conteúdo e endereçamento e deve observar as normas internas da Petrobras. Cabe ao destinatário assegurar que as informações e dados pessoais contidos neste correio eletrônico somente sejam utilizados com o grau de sigilo adequado e em conformidade com a legislação de proteção de dados e privacidade aplicável. A utilização das informações e dados pessoais contidos neste correio eletrônico em desconformidade com as normas aplicáveis acarretará a aplicação das sanções cabíveis. The sender of this message is responsible for its content and address and must comply with Petrobras' internal rules. It is up to the recipient to ensure that the information and personal data contained in this email are only used with the appropriate degree of confidentiality and in compliance with applicable data protection and privacy legislation. The use of the information and personal data contained in this e-mail in violation of the applicable rules will result in the application of the applicable sanctions. El remitente de este mensaje es responsable por su contenido y dirección y debe cumplir con las normas internas de Petrobras. Corresponde al destinatario asegurarse de que la información y los datos personales contenidos en este correo electrónico solo se utilicen con el grado adecuado de confidencialidad y de conformidad con la legislación aplicable en materia de privacidad y protección de datos. El uso de la información y datos personales contenidos en este correo electrónico en contravención de las normas aplicables dará lugar a la aplicación de las sanciones correspondientes.

CW

Christopher Wright

Mon, Dec 19, 2022 3:09 PM

On Dec 18, 2022, at 11:28 AM, Francesca Pistorio francesca.pistorio@polito.it wrote:

In addition, I need to use solid elements (eg solid186). However, the problem is that solid elements do not have rotational degrees of freedom so I cannot directly apply a bending moment M.

Impose a transverse distributed load to a model of a simple beam and determine the internal bending moment and shear loads anywhere along the span. Select the the elements to one side of the section and nodes along the cross section of interest. Then issue the NFORCE command to produce the internal force distribution at the section.

Don't load the model with concentrated forces because solid elements react badly to concentrated forces. Use body loads like dead weight or surface pressures.

Christopher Wright P.E. (ret'd) |"They couldn't hit an elephant at
chrisw@skypoint.com | this distance" (last words of Gen.
http://www.skypoint.com/members/chrisw/ | John Sedgwick, Spotsylvania (1864)

> On Dec 18, 2022, at 11:28 AM, Francesca Pistorio <francesca.pistorio@polito.it> wrote: > > In addition, I need to use solid elements (eg solid186). However, the problem is that solid elements do not have rotational degrees of freedom so I cannot directly apply a bending moment M. Impose a transverse distributed load to a model of a simple beam and determine the internal bending moment and shear loads anywhere along the span. Select the the elements to one side of the section and nodes along the cross section of interest. Then issue the NFORCE command to produce the internal force distribution at the section. Don't load the model with concentrated forces because solid elements react badly to concentrated forces. Use body loads like dead weight or surface pressures. Christopher Wright P.E. (ret'd) |"They couldn't hit an elephant at chrisw@skypoint.com | this distance" (last words of Gen. http://www.skypoint.com/members/chrisw/ | John Sedgwick, Spotsylvania (1864)

DG

David Gross

Tue, Dec 20, 2022 3:02 PM

Dear OP,

Sorry to be late to the party, but in addition to the SF command in APDL, also look at SFGRAD.

Regards,

David Gross
Dominion Engineering, Inc.

-----Original Message-----
From: Christopher Wright chrisw@skypoint.com
Sent: Monday, December 19, 2022 10:10 AM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Subject: [Xansys] Re: [STRUCT] Bending moment and solid elements

On Dec 18, 2022, at 11:28 AM, Francesca Pistorio francesca.pistorio@polito.it wrote:

In addition, I need to use solid elements (eg solid186). However, the problem is that solid elements do not have rotational degrees of freedom so I cannot directly apply a bending moment M.

Impose a transverse distributed load to a model of a simple beam and determine the internal bending moment and shear loads anywhere along the span. Select the the elements to one side of the section and nodes along the cross section of interest. Then issue the NFORCE command to produce the internal force distribution at the section.

Don't load the model with concentrated forces because solid elements react badly to concentrated forces. Use body loads like dead weight or surface pressures.

Christopher Wright P.E. (ret'd) |"They couldn't hit an elephant at
chrisw@skypoint.com | this distance" (last words of Gen.
http://www.skypoint.com/members/chrisw/ | John Sedgwick, Spotsylvania (1864)

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Dear OP, Sorry to be late to the party, but in addition to the SF command in APDL, also look at SFGRAD. Regards, David Gross Dominion Engineering, Inc. -----Original Message----- From: Christopher Wright <chrisw@skypoint.com> Sent: Monday, December 19, 2022 10:10 AM To: XANSYS Mailing List Home <xansys-temp@list.xansys.org> Subject: [Xansys] Re: [STRUCT] Bending moment and solid elements > On Dec 18, 2022, at 11:28 AM, Francesca Pistorio <francesca.pistorio@polito.it> wrote: > > In addition, I need to use solid elements (eg solid186). However, the problem is that solid elements do not have rotational degrees of freedom so I cannot directly apply a bending moment M. Impose a transverse distributed load to a model of a simple beam and determine the internal bending moment and shear loads anywhere along the span. Select the the elements to one side of the section and nodes along the cross section of interest. Then issue the NFORCE command to produce the internal force distribution at the section. Don't load the model with concentrated forces because solid elements react badly to concentrated forces. Use body loads like dead weight or surface pressures. Christopher Wright P.E. (ret'd) |"They couldn't hit an elephant at chrisw@skypoint.com | this distance" (last words of Gen. http://www.skypoint.com/members/chrisw/ | John Sedgwick, Spotsylvania (1864) _______________________________________________ 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