Learning Forum

[Protja]

Hello,

Right now, I am part in a project for experimenting and modelling shear-, bearing- and tension tests for bolts and sheets. We are working with stainless steel.
Usually we are modelling the geometry with separate software tools, import them in Ansys workbench (18.1/19.1) and set the boundary conditions, apply loading conditions etc.
Right now, I got the problem not being able to setup the material behaviour for anisotropic plasticity.
Preferably, I would like to model orthotropic behaviour for all 3 dimensions separately, which would allow to simulate the differences in properties of the sheet-material it obtains in the fabrication process due to the direction of rolling.
An alternative, simpler option could be to apply one parameter in length direction and one in a 90° angle and use an average material behaviour.
Problem: anisotropic behaviour for elastic conditions was selectable; however, I found no option for anisotropic plasticity in Ansys workbench. Was there something I have overlooked or is it possible, to modify the material properties with an APDL code inside of Ansys workbench? Using the drag & drop system, there was no connection possible between “mechanical APDL” and “engineering data”.
Thank you for your time and effort.

Kind regards,
M.B.

[Protja]

Nobody got the same issue or solution?

Anisotropic plasticity behaviour should be quite common for quite a few materials.

[Wenlong]

Hi Protjia,

 

Does "Hill Yield Criterion" serve your purpose? You can define anisotropic yield stress in different directions.

Regards,

Wenlong

[Protja]

Hi Wenlong,

 

Thank you very much for your response. I'm kind of confused, why it seems like I don't have the option for selecting "hill yield criterion" as showen in the screenshot below:

 

Baustahl is german for structural steel.

Same issue if i choose Edelstahl NL (stainless steel non-linear) or Baustahl NL (structural steel non-linear).

Do I need to import some additional libaries? I can't quiet read your sources, but i guess it says "general_materials.xml"?

 

Edit: "Workbench 2019 R2"

[Wenlong]

Hi Protja,

 

It is available in Workbench 2020R1 interface. The theory is still available in your version, and you can use a command snippet to implement that. Here is an example of the Hill anisotropic yield criterion command:

This image is taken from this link: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v194/ans_str/Hlp_G_STR8_3.html

If you need help implementing the command snippet, feel free to let me know. I also attach a link about how to show full resolution images. 

 

Regards,

Wenlong

 

---

Useful Links

---

• How to access Ansys Online Help Document


• How to show full resolution image

 

[lincs2k9]

Hello Wenlong,

I have faced problem to apply (TB, ANISO) material properties in Ansys workbench. Can you please check my post to help me? Here is the link of my post-

/forum/forums/topic/orthotropic-nonlinear-material-properties-tb-aniso/

 

[Wenlong]

 Sure. I will reply shortly. 

[bharat_1]

Hello Wenlong, n   I put all values in the hill yield criteria, but it shows a question mark in front of the hill yield or material. I am stuck there why it's happening. how can resolve this problem please advise me. it shows a nscreenshot like below.nThank you in advance. n