Ansys tensile test fracture

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Suli7 posted this 03 November 2018

 

Hi,

 

I have to simulate a tensile test of a steel-sample and also be able to show the fracture in ANSYS static structural. The sample is under load until break.

The material of the cuboid sample is Steel (non-linear), because I have to show the plastic area as well.

 

Unfortunately, I’m not getting the specimen to break, even though if I increase the force. I always get an error message like "internal limit has been exceeded and strong distortion".

 

 However, I need to know where the steel sample breaks, in which area and when it breaks (stress-strain curve).

I can get a fracture in explicit dynamics, but this is irrelevant, since the real tensile test has a low and constant strain rate.

 

The one side of the sample is firmly fixed and the other side is under tensile load.

 

Is it even possible to describe the fracture of a tensile test using ANSYS static structural?

 

After long time of searching for a solution, I have come across “crack” and “APDL-code”, but I don’t know if that solves my problem. Since I’m not familiar with both of them.

I would be very grateful someone here from ANSYS-Student-Community could help me.

 

Thanks in advance.

 

 

 

 

 

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Suli7 posted this 03 November 2018

Suli7 posted this 03 November 2018

SandeepMedikonda posted this 03 November 2018

Hi Suli,

Peter explains how to do this in this excellent post. Even the file is attached for you to play with.

Regards,
Sandeep

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Suli7 posted this 05 November 2018

Hi Sandeep, 

Thanks for the quick reply and for the post from Peter. I really appreciate it. 

I will try to repeat the steps from Peter and I will let you know in the next couple of day if I was Succsessful or not. 

Best regards

Suli

Suli7 posted this 06 November 2018

Unfortunately it won't work with the sample thatI have, since it is not 2D geometry but rather a 3D sample. I get an error all the time because of the dimension.

I have also tried to do it on my own where I followed the steps from Peter. Here the problem is the commands (APDL). I'm not that familiar with the coding.

I have attached the sample and the the project from ANSYS.

It would be great if you or Peter could help me further. 

Thanks in advance

Attached Files

SandeepMedikonda posted this 07 November 2018

You can use EKILL/EALIVE within mechanical itself starting in v19. Please see the help.

It's not that hard to do this. Please see these articles (1 & 2) for well explained.

You will also find a good explanation here.

Regards,
Sandeep

Suli7 posted this 2 weeks ago

Thanks for the link to the articles Sandeep, but unfortunately I wasn't able to solve it. 

 

SandeepMedikonda posted this 2 weeks ago

Ok, What is the problem in your case? Check the solver output to look at why it didn't work. 

You can compare what you are doing with what peter did in his model.

Regards,
Sandeep

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