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  Topic: [APDL] hyperelastic material: convergence error
saeed.akbari

Replies: 1
Views: 11150

PostForum: XANSYS   Posted: Sun Jan 17, 2016 1:58 pm   Subject: [APDL] hyperelastic material: convergence error
Hello everyone,

I'm trying to model a rubber-like material using neo Hookean hyperelastic material model:

ET,1,PLANE183 ! keyopt3=0 (plane stress)
KEYOPT,1,3,0
E=0.956e6
Nu=0.35 ...
  Topic: [APDL] strain energy of cantilever beam
saeed.akbari

Replies: 2
Views: 13470

PostForum: XANSYS   Posted: Thu Dec 17, 2015 10:48 pm   Subject: [APDL] strain energy of cantilever beam
That's true!
Thanks Martin!
  Topic: [APDL] strain energy of cantilever beam
saeed.akbari

Replies: 2
Views: 13470

PostForum: XANSYS   Posted: Thu Dec 17, 2015 5:55 pm   Subject: [APDL] strain energy of cantilever beam
Hello All,

I'm modeling a cantilever beam with Plane183 and KEYOPT(3)=0 (plane stress).
Then I use SENE command to calculate stiffness (strain) energy of the beam.
The strain energy of the beam ...
  Topic: [APLD] Spring connection to a beam
saeed.akbari

Replies: 0
Views: 7731

PostForum: XANSYS   Posted: Fri Nov 27, 2015 3:20 am   Subject: [APLD] Spring connection to a beam
Dear friends

I am modeling a beam resting on a few springs.
First, I modeled and meshed the beam using PLANE183 elements.
To model each spring, modeled with COMBIN14 elements, I need two nodes: o ...
  Topic: [APDL] large deformation of polymers
saeed.akbari

Replies: 2
Views: 7330

PostForum: XANSYS   Posted: Tue Sep 15, 2015 11:26 am   Subject: [APDL] large deformation of polymers
Hello everyone,

I am going to model a polymeric sheet (dimensions:0.5 mm*0.5 mm) that because of its specific microstructure, can undergo significant elastic deformation. It is used as a scaffold i ...
  Topic: [APDL] Topographical display of stress distribution
saeed.akbari

Replies: 2
Views: 4317

PostForum: XANSYS   Posted: Tue Jul 21, 2015 5:12 am   Subject: [APDL] Topographical display of stress distribution
Thanks Kevin, that worked!
One more question:
How could we remove alphabetic labels on contours, and instead add numeric labels showing the average values of the contours?
This command only adds a ...
  Topic: [APDL] Topographical display of stress distribution
saeed.akbari

Replies: 2
Views: 4317

PostForum: XANSYS   Posted: Sat Jul 04, 2015 9:26 am   Subject: [APDL] Topographical display of stress distribution
Hell all,

I am writing a report on the stress analysis of an engineering component.
The report should be black and white, not colorful!
So to display the results, I need to show the stress distri ...
  Topic: [APDL] short cantilever beam- normal ste
saeed.akbari

Replies: 11
Views: 11331

PostForum: XANSYS   Posted: Thu Feb 19, 2015 1:52 pm   Subject: [APDL] short cantilever beam- normal stress due to shear
Hi Christopher,

You didn't get my point. I was talking only about the normal stress.
The normal stress has two components: the first component is due to the bending moment, the second component is ...
  Topic: [APDL] short cantilever beam- normal ste
saeed.akbari

Replies: 11
Views: 11331

PostForum: XANSYS   Posted: Thu Feb 19, 2015 1:09 pm   Subject: [APDL] short cantilever beam- normal ste
Hello everyone,

In a a relatively short cantilever beam, that is under a vertical load at its end, normal stress has two components: the first component is due to bending, the second component is ...
  Topic: Fracture-stress intensity factors-contour paths
saeed.akbari

Replies: 4
Views: 6408

PostForum: XANSYS   Posted: Mon Dec 01, 2014 6:03 am   Subject: Fracture-stress intensity factors-contour paths
Thanks Metin for your complete answer.

I still do not know how to see the contour path. I am using "CINT" command to calculate J-integral. For this command, it is not necessary to define ...
  Topic: Fracture-stress intensity factors-contour paths
saeed.akbari

Replies: 4
Views: 6408

PostForum: XANSYS   Posted: Sat Nov 29, 2014 8:47 pm   Subject: Fracture-stress intensity factors-contour paths
Base on ANSYS help "stress-intensity factorsare strictly valid under the small-scale yielding assumption; therefore, the crack tip plastic zone must be small. In practice, the crack tip plastic z ...
  Topic: Anand Viscoplasticity
saeed.akbari

Replies: 9
Views: 14817

PostForum: XANSYS   Posted: Tue Nov 18, 2014 6:41 am   Subject: Anand Viscoplasticity
Thanks Jobie

Your comments are really helpful.
I have one more question:
Calculation of fracture parameters like J-integral and stress intensity factors
is not possible using viscoelastic or vis ...
  Topic: Anand Viscoplasticity
saeed.akbari

Replies: 9
Views: 14817

PostForum: XANSYS   Posted: Mon Nov 17, 2014 2:33 pm   Subject: Anand Viscoplasticity
It worked! thanks Jobie!

I have a few more questions:
1) Why a non-zero temperature must be defined for anad?
According to coefficients defined for anad model, anad is not temperature dependent. ...
  Topic: Anand Viscoplasticity
saeed.akbari

Replies: 9
Views: 14817

PostForum: XANSYS   Posted: Mon Nov 17, 2014 5:54 am   Subject: Anand Viscoplasticity
Thanks Pascal for your help.

Hello

Notice that the only test in ANSYS using Anand model is VM199 : Viscoplastic Analysis of a Body (Shear Deformation)

It is not a serious test because the r ...
  Topic: Anand Viscoplasticity
saeed.akbari

Replies: 9
Views: 14817

PostForum: XANSYS   Posted: Sat Nov 15, 2014 6:18 am   Subject: Anand Viscoplasticity
Thanks Mohammad,
I use the verification model VM178 anailable in ANSYS v15 help, which is also availalabe via this link:
https://www.sharcnet.ca/Software/Fluent14/help/ans_vm/Hlp_V_VM178TXT.html
...
  Topic: Anand Viscoplasticity
saeed.akbari

Replies: 9
Views: 14817

PostForum: XANSYS   Posted: Fri Nov 14, 2014 7:07 pm   Subject: Anand Viscoplasticity
I could run verification model VM178 in ANSYS v15 to calculate strain energy release rate for a double cantilever beam specimen without any problem.
I want to repeat this code with Anand Viscoplastic ...
  Topic: dependence of fracture parameters on crack length
saeed.akbari

Replies: 2
Views: 2632

PostForum: XANSYS   Posted: Thu Oct 09, 2014 7:22 am   Subject: dependence of fracture parameters on crack length
I found the answer myself!
The sensitivity of fracture parameters to the crack length is because of the short crack limitations of LEFM.
For short cracks (typically less than 250 microns), the effec ...
  Topic: dependence of fracture parameters on crack length
saeed.akbari

Replies: 2
Views: 2632

PostForum: XANSYS   Posted: Mon Sep 22, 2014 6:10 am   Subject: Re: dependence of fracture parameters on crack length
Hell all,

I'm modeling the fracture parameters (J-integral and mode ratio) of
crack growth within the solder balls connecting a microelectronics chip to a circuit board.
We assume J-integral as ...
  Topic: dependence of fracture parameters on crack length
saeed.akbari

Replies: 2
Views: 2632

PostForum: XANSYS   Posted: Mon Sep 22, 2014 5:58 am   Subject: dependence of fracture parameters on crack length
Hell all,

I'm modeling the fracture parameters (J-integral and mode ratio) of
crack growth within the solder balls connecting a microelectronics chip to a circuit board.
We assume J-integral as ...
 
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