Empathy List Archives

DV

Dayal, Vinay [AER E]

Thu, Jan 20, 2022 9:01 PM

I want to solve this problem:
[cid:82de071b-7695-4819-aaea-26440f168307]

In ANSYS the pressure load can be ramped, but it is applied in the plane of the area. So, pressure perpendicular to the plane is not possible.

In Workbench the line pressure can be applied in component form and so perpendicular pressure is possible. The problem there is that the pressure is constant over the line and a ramped pressure is not allowed.

Any ideas how this can be overcome? I know the round about ways of doing it. In ANSYS, create a tiny area on the line, perpendicular to the area, and then apply pressure on the outer line. But then I am changing the effective stiffness of the plate.

Any ideas?

Vinay Dayal

Dr. Vinay Dayal
Associate Professor
Aerospace Engineering
Faculty Associate
Center for Nondestructive Evaluations
1200 Howe Hall, 537 Bissell Rd
Iowa State University
Ames, IA 50011

I want to solve this problem: [cid:82de071b-7695-4819-aaea-26440f168307] In ANSYS the pressure load can be ramped, but it is applied in the plane of the area. So, pressure perpendicular to the plane is not possible. In Workbench the line pressure can be applied in component form and so perpendicular pressure is possible. The problem there is that the pressure is constant over the line and a ramped pressure is not allowed. Any ideas how this can be overcome? I know the round about ways of doing it. In ANSYS, create a tiny area on the line, perpendicular to the area, and then apply pressure on the outer line. But then I am changing the effective stiffness of the plate. Any ideas? Vinay Dayal Dr. Vinay Dayal Associate Professor Aerospace Engineering Faculty Associate Center for Nondestructive Evaluations 1200 Howe Hall, 537 Bissell Rd Iowa State University Ames, IA 50011

RR

rafael.rodarte@sew.com.br

Fri, Jan 21, 2022 11:02 AM

Hi

See the command SFGRAD

-----Mensagem original-----
De: Dayal, Vinay [AER E] vdayal@iastate.edu
Enviada em: quinta-feira, 20 de janeiro de 2022 18:01
Para: XANSYS Mailing List Home xansys-temp@list.xansys.org
Assunto: [Xansys] Applying ramp load

I want to solve this problem:
[cid:82de071b-7695-4819-aaea-26440f168307]

In ANSYS the pressure load can be ramped, but it is applied in the plane of the area. So, pressure perpendicular to the plane is not possible.

In Workbench the line pressure can be applied in component form and so perpendicular pressure is possible. The problem there is that the pressure is constant over the line and a ramped pressure is not allowed.

Any ideas how this can be overcome? I know the round about ways of doing it. In ANSYS, create a tiny area on the line, perpendicular to the area, and then apply pressure on the outer line. But then I am changing the effective stiffness of the plate.

Any ideas?

Vinay Dayal

Dr. Vinay Dayal
Associate Professor
Aerospace Engineering
Faculty Associate
Center for Nondestructive Evaluations
1200 Howe Hall, 537 Bissell Rd
Iowa State University
Ames, IA 50011

Hi See the command SFGRAD -----Mensagem original----- De: Dayal, Vinay [AER E] <vdayal@iastate.edu> Enviada em: quinta-feira, 20 de janeiro de 2022 18:01 Para: XANSYS Mailing List Home <xansys-temp@list.xansys.org> Assunto: [Xansys] Applying ramp load I want to solve this problem: [cid:82de071b-7695-4819-aaea-26440f168307] In ANSYS the pressure load can be ramped, but it is applied in the plane of the area. So, pressure perpendicular to the plane is not possible. In Workbench the line pressure can be applied in component form and so perpendicular pressure is possible. The problem there is that the pressure is constant over the line and a ramped pressure is not allowed. Any ideas how this can be overcome? I know the round about ways of doing it. In ANSYS, create a tiny area on the line, perpendicular to the area, and then apply pressure on the outer line. But then I am changing the effective stiffness of the plate. Any ideas? Vinay Dayal Dr. Vinay Dayal Associate Professor Aerospace Engineering Faculty Associate Center for Nondestructive Evaluations 1200 Howe Hall, 537 Bissell Rd Iowa State University Ames, IA 50011

DV

Dayal, Vinay [AER E]

Wed, Feb 2, 2022 4:32 PM

OK. The plate problem was too difficult. So can anyone solve this problem:
I you make 1 beam element then the solution is not correct. If you make 10 elements, then you must distribute load variation for each element. You cannot make the entire beam a line, mesh, and try to apply pressure on the line. Line in ANSYS is defined attached to an area in ANSYS. A standalone line cannot have a pressure.
Any ANSYS experts here who can answer?

[cid:da710925-8e55-4dd8-9459-ab3a680e6a26]

Vinay Dayal

From: Dayal, Vinay [AER E]
Sent: Thursday, January 20, 2022 3:01 PM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Subject: Applying ramp load

I want to solve this problem:
[cid:82de071b-7695-4819-aaea-26440f168307]

In ANSYS the pressure load can be ramped, but it is applied in the plane of the area. So, pressure perpendicular to the plane is not possible.

In Workbench the line pressure can be applied in component form and so perpendicular pressure is possible. The problem there is that the pressure is constant over the line and a ramped pressure is not allowed.

Any ideas how this can be overcome? I know the round about ways of doing it. In ANSYS, create a tiny area on the line, perpendicular to the area, and then apply pressure on the outer line. But then I am changing the effective stiffness of the plate.

Any ideas?

Vinay Dayal

Dr. Vinay Dayal
Associate Professor
Aerospace Engineering
Faculty Associate
Center for Nondestructive Evaluations
1200 Howe Hall, 537 Bissell Rd
Iowa State University
Ames, IA 50011

OK. The plate problem was too difficult. So can anyone solve this problem: I you make 1 beam element then the solution is not correct. If you make 10 elements, then you must distribute load variation for each element. You cannot make the entire beam a line, mesh, and try to apply pressure on the line. Line in ANSYS is defined attached to an area in ANSYS. A standalone line cannot have a pressure. Any ANSYS experts here who can answer? [cid:da710925-8e55-4dd8-9459-ab3a680e6a26] Vinay Dayal ________________________________ From: Dayal, Vinay [AER E] Sent: Thursday, January 20, 2022 3:01 PM To: XANSYS Mailing List Home <xansys-temp@list.xansys.org> Subject: Applying ramp load I want to solve this problem: [cid:82de071b-7695-4819-aaea-26440f168307] In ANSYS the pressure load can be ramped, but it is applied in the plane of the area. So, pressure perpendicular to the plane is not possible. In Workbench the line pressure can be applied in component form and so perpendicular pressure is possible. The problem there is that the pressure is constant over the line and a ramped pressure is not allowed. Any ideas how this can be overcome? I know the round about ways of doing it. In ANSYS, create a tiny area on the line, perpendicular to the area, and then apply pressure on the outer line. But then I am changing the effective stiffness of the plate. Any ideas? Vinay Dayal Dr. Vinay Dayal Associate Professor Aerospace Engineering Faculty Associate Center for Nondestructive Evaluations 1200 Howe Hall, 537 Bissell Rd Iowa State University Ames, IA 50011

CA

Caba, Aaron (US)

Fri, Feb 4, 2022 2:00 PM

In Workbench the line pressure can be applied in component form and so
perpendicular pressure is possible. The problem there is that the pressure
is constant over the line and a ramped pressure is not allowed.

Vinay,

Have you tried defining a table that has the load as a function of location? This Ozen article shows how to do that. Make tables for X, Y, Z load components then apply them individually. There is an example about 2/3 of the way down.
https://www.ozeninc.com/apdl-arrays-tables-quickreference/

To understand this better, look at the input deck Mechanical is producing for your perpendicular loads. Mechanical writes out a file called ds.dat, and it will show you the APDL commands needed to produce your loads. Combine that with the tables above and you should be able to solve your problem.

More info about tables:
https://www.padtinc.com/blog/what-every-user-should-know-about-tables-in-ansys-mechanical-apdl/

Aaron

-----Original Message-----
From: Dayal, Vinay [AER E] vdayal@iastate.edu
Sent: Wednesday, February 2, 2022 11:33 AM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Subject: [Xansys] Re: Applying ramp load

External Email Alert

This email has been sent from an account outside of the BAE Systems network.
Please treat the email with caution, especially if you are requested to click on a link, decrypt/open an attachment, or enable macros. For further information on how to spot phishing, access OSI IT Policies and report phishing by forwarding mail to phishing@baesystems.com.

OK. The plate problem was too difficult. So can anyone solve this problem:
I you make 1 beam element then the solution is not correct. If you make 10 elements, then you must distribute load variation for each element. You cannot make the entire beam a line, mesh, and try to apply pressure on the line. Line in ANSYS is defined attached to an area in ANSYS. A standalone line cannot have a pressure.
Any ANSYS experts here who can answer?

[cid:da710925-8e55-4dd8-9459-ab3a680e6a26]

Vinay Dayal

From: Dayal, Vinay [AER E]
Sent: Thursday, January 20, 2022 3:01 PM
To: XANSYS Mailing List Home xansys-temp@list.xansys.org
Subject: Applying ramp load

I want to solve this problem:
[cid:82de071b-7695-4819-aaea-26440f168307]

In ANSYS the pressure load can be ramped, but it is applied in the plane of the area. So, pressure perpendicular to the plane is not possible.

In Workbench the line pressure can be applied in component form and so perpendicular pressure is possible. The problem there is that the pressure is constant over the line and a ramped pressure is not allowed.

Any ideas how this can be overcome? I know the round about ways of doing it. In ANSYS, create a tiny area on the line, perpendicular to the area, and then apply pressure on the outer line. But then I am changing the effective stiffness of the plate.

Any ideas?

Vinay Dayal

Dr. Vinay Dayal
Associate Professor
Aerospace Engineering
Faculty Associate
Center for Nondestructive Evaluations
1200 Howe Hall, 537 Bissell Rd
Iowa State University
Ames, IA 50011

> In Workbench the line pressure can be applied in component form and so > perpendicular pressure is possible. The problem there is that the pressure > is constant over the line and a ramped pressure is not allowed. Vinay, Have you tried defining a table that has the load as a function of location? This Ozen article shows how to do that. Make tables for X, Y, Z load components then apply them individually. There is an example about 2/3 of the way down. https://www.ozeninc.com/apdl-arrays-tables-quickreference/ To understand this better, look at the input deck Mechanical is producing for your perpendicular loads. Mechanical writes out a file called ds.dat, and it will show you the APDL commands needed to produce your loads. Combine that with the tables above and you should be able to solve your problem. More info about tables: https://www.padtinc.com/blog/what-every-user-should-know-about-tables-in-ansys-mechanical-apdl/ Aaron -----Original Message----- From: Dayal, Vinay [AER E] <vdayal@iastate.edu> Sent: Wednesday, February 2, 2022 11:33 AM To: XANSYS Mailing List Home <xansys-temp@list.xansys.org> Subject: [Xansys] Re: Applying ramp load External Email Alert This email has been sent from an account outside of the BAE Systems network. Please treat the email with caution, especially if you are requested to click on a link, decrypt/open an attachment, or enable macros. For further information on how to spot phishing, access OSI IT Policies and report phishing by forwarding mail to phishing@baesystems.com. OK. The plate problem was too difficult. So can anyone solve this problem: I you make 1 beam element then the solution is not correct. If you make 10 elements, then you must distribute load variation for each element. You cannot make the entire beam a line, mesh, and try to apply pressure on the line. Line in ANSYS is defined attached to an area in ANSYS. A standalone line cannot have a pressure. Any ANSYS experts here who can answer? [cid:da710925-8e55-4dd8-9459-ab3a680e6a26] Vinay Dayal ________________________________ From: Dayal, Vinay [AER E] Sent: Thursday, January 20, 2022 3:01 PM To: XANSYS Mailing List Home <xansys-temp@list.xansys.org> Subject: Applying ramp load I want to solve this problem: [cid:82de071b-7695-4819-aaea-26440f168307] In ANSYS the pressure load can be ramped, but it is applied in the plane of the area. So, pressure perpendicular to the plane is not possible. In Workbench the line pressure can be applied in component form and so perpendicular pressure is possible. The problem there is that the pressure is constant over the line and a ramped pressure is not allowed. Any ideas how this can be overcome? I know the round about ways of doing it. In ANSYS, create a tiny area on the line, perpendicular to the area, and then apply pressure on the outer line. But then I am changing the effective stiffness of the plate. Any ideas? Vinay Dayal Dr. Vinay Dayal Associate Professor Aerospace Engineering Faculty Associate Center for Nondestructive Evaluations 1200 Howe Hall, 537 Bissell Rd Iowa State University Ames, IA 50011