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Good luck

Frank

Maybe this could help you getting the direct cycle method on the go:

https://www.youtube.com/watch?v=rxkzPWa_lYk&list=PLE4jpqcRJiBrNlnkqCrCLJHKoIEs71mQP

Abaqus uses a specific plug-in when modeling fatigue. You need to ask the local support team  for this plug-in. It should be free.

Thanks Manuel,

I watch all your three parts of fracture videos and i appreciate you for them,but the point is  you used VCCT method in abaqus, but i want to use XFEM method instead. I wawnt to propagate an edge crack under fatigue load. (Load-Control)

Thanks Xinpu,

Do you point to Zencrack plug-in?

Hai friends,

       Am doing a project on simulation of  crack growth propagation in shell elements using ansys. I have designed the model and determined the stress intensity factor k1 using APDL codes.

It would be a great help if someone could help me in crack growth simulation

thank you.

Hi Mohan.

I can simulate fatigue crack growth in ABAQUS, if you need help with this software, i can help you.

Thanks.

Hello Amin

My main aim of the project is automatic remeshing , of a meshed plate during crack growth propagation. I have used shell elemnts in my model.

Could please tell about your work, have you interfaced abaqus with matlab or python.

thanks for your timely help

hi 

maybe this video can help https://www.youtube.com/watch?v=hleGKlOAeK0

Hello Amin,

I also want to simulate a propagation of crack using xfem method in abaqus.

I used Static Analysis then followed by Direct cyclic.

My problem is that, why the crack cannot propagate in Direct Cyclic analysis?

Hi Nazirah,

I did not understand your problem, so can you explain it some more?

Thanks, Amin

Hello Amin, I also need to do a Abaqus simulation in fatigue crack propagation of a CT specimen with mechanical properties of UHMWPE. Could you please help me? thank you very much

Hello Amin, 

Am also doing simulating crack using XFEM method in abaqus, but am not sure about cyclic load. Could you help me with applying cyclic load?

Hello Sathiya.

You can use direct cyclic step and also define a periodic load using amplitude in tools menu.

If you have any question, feel free to ask.

Hello, I am working on modeling of 3D CT specimen under tension low cyclic analysis (direct approach). I have convergence problems: the force eq. uses to converge after too many iterations (150 or more) and sometimes even it does not. I tried to change meshing (reducing) as well as simplifying the model.

Any suggestion?

I also have many other questions, is there someone experienced in this matter?

Hello Danilo,

You should try to change some parameters and also change your mesh type for convergence. If you tell me more about details, i can help you. :)

Dear Amin, there are many parameters about which I am not sure... May I ask you to take a quick luck at my odb script?

Many thanks. 

Dear Danilo, 

Yes, of course.

Here is my email address:

[email protected]

Please write down more in details, Thanks.

Dear Amin, can you please take a look at the email i sent to you about fatigue crack growth modeling. I really hope to get some feedback from you. Thank you very much.

Hi Nazirah,

Ok, sure.

Please resend the mail you sent.

Dear Amin, I have sent you an email, please have a look at it. I would really appreciate your helps. Thank you very much.

Hi Amin, I am trying to simulate fatigue crack growth using xfem in abaqus. can you help me with it.

Thanks

Hi Amin, I am also trying to simulate fatigue crack growth using xfem in abaqus. can you help me with it or can you sent a simple example CAE file to my email? [email protected]

Thanks in advance

Hi Yajun,

Please tell more about what you want to do exactly.

I hope i could help you.

Regards, Amin.

exactly ,i want to model the fatigue crack propagation, but i don't know how to apply damage criterion and load. so i hope i can have an example to elp me. would tou like to give your email? thank you

Hello Amin,

I am working on a numerical evaluation of mode I damage propagation in composite materials..I need to plot the Crack length vs. opening displacement or Fracture energy vs. Crack length..but i don't know how to find the data for Crack length..As i searched in google we can not obtain data for Crack length on History output. Is it true? Could you give me some suggestions..I really will appreciate it!

Hi Somayeh,

Sorry i was late. Yes you are right, there is no data for crack length on history output. But you can use the mesh geometry to extract data manually.

If you need more explanation, feel free to ask me.

Regards, Amin.

Hi dear Amin,

How much is normal mode fracture energy for steel ?

Hi Amin,

I try to create a micro-cracks in a steel plate,and I want it could be compressed or Stretched when wave pass through it, can you help me ?what condition I need do Boundary conditions for crack

Hi Mr.Javidrad

actually you must conduct an experimental test to obtain this parameter.

You can also find it in other literature.

Feel free to ask me more, if you need.

Hi dear Jia Lu,

Please tell more in details in your model.

@ ALL

I am also about to learn CCG through fatigue modelling in abaqus on HDPE. A good feedback shall be appreciated.

Do we have to initiate fatigue crack at a predefined location or does Abaqus initiates crack as per the stresses?

Astitwa Sharma

________________________

For now, "just does Abaqus initiates crack as per the stresses."

________________________

Dear Sharma,

Both of them are possible, and it depends on what results you want in outputs.

Regards.

Hi Amin!

Direct cyclic approach in Abaqus is based on the continuum damage mechanic and is useful to obtain the response of a structure subjected to fatigue/periodic loading. The following links are also useful:

https://www.youtube.com/watch?v=CDfwV-d4dLQ

https://www.youtube.com/watch?v=IcWogmHbsg8

Hi Amin, I am also trying to simulate fatigue crack growth using xfem in abaqus. can you help me with it or can you sent a simple example CAE file to my email?

[email protected]

Thanks in advance

Hi Feng,

If you have faced with a specific problem, Tell it here to answer you or send your CAE file for me to check it out.