Fracture Mechanics Forum

hiii My dear CAE simulators....

plz help me m doing fatigue life estimation of plate with hole problem under constant amplitude tensile-compression

Hi All!

I am a beginner in the field of abaqus. I am trying to obtain J integral for throughwall circumferentially cracked pipes. I found these images from fracture lectures of abaqus training slides. I wanted to know what is the partitioning stragegy in abaqus, to create the partition for the contours.

I am using EPFM, Ramberg Osgood model, subejcting the pipes to bending moments.

Thanks in Advance!!

(Firstly, not sure if this is the proper place to post this question. I see a lot of posts about ABAQUS but not Ansys)

I’m new to fracture analysis, and I get a problem with the analysis process with thermal loading.

I will appreciate it if anyone could give me some comments or inputs on my Ansys command or the process to conduct fracture analysis with thermal loading in Ansys.

Can anybody help me in using smeared crack and cohesive zone modeling in concrete for different grades. I was actually facing problem in using the same to identify fracture parameters of concrete using ABAQUS. I will also be helpful if anyone let me know about an alternate method to find fracture parameters of concrete using ABAQUS apart from using models. Thanks in advance.......

Can anybody help me in using smeared crack and cohesive zone modeling in concrete for different grades. I was actually facing problem in using the same to identify fracture parameters of concrete using ABAQUS. I will also be helpful if anyone let me know about an alternate method to find fracture parameters of concrete using ABAQUS apart from using models. Thanks in advance.......

Hi all,

Hello all...
I want to study ''fatigue crack growth'' in Abaqus...I need your help...Could anybody help me about this problem??
I need to know, what is the XFEM Abaqus out put for fracture mechanic??I meen does it give SIF,N(fatigue life) and the crack path??I read Abaqus documentation, it has said that Abaqus can do low cycle fatigue,Can I use it for HCF?? do I need to write a code or subroutine??
Thank you

pls sugguest ur ideas and i need ansys procedure for this

Hi All,

Hi guys,

I am all new user to deform 3d. from the past month i managed to learn a bit of that. now i can deform a sheet into a cup using a punch and die set. problem is there are wrinkles on the cup. how to apply blank holder force. Can any body explain in detail. plz help me so that i can finish my project.

Hi everyone,

Can someone show me the procedure to follow to use the cohesive elements to model the fracture in Abaqus for an homogeneous material and without the use of a subroutine UEL. Thank you in advance.

Best regards.

Hi everbody,

I am trying to study about carck propagation in a material. The part is 2D deformable and I am going with XFEM for the analysis. 

Can you please tell me how to calculate the MAXPS damage under Damage for Traction Laws?

Elastic Modulus of the material: 0.031 (Newton per micrometer square)

Load: 0.15 um displacement in the 'x' direction = 1.2245e-3 N in the x direction

I am using Abaqus /CAE 6.10

Any kind of help will be appreciated.

Thanks

Hello,

I have modeled a 2D plate with sigle edge crack in Abaqus software. I want to plot crack growth with time. Kindly help.

Thanks & regards

Rajwinder Singh

Email: rajwinder87@gmail.com 

Hi everyone,

I am trying to get the history output of
strain and stress tensor components at a node. However after analysis is
finished no such data are saved in the result section. I think Abaqus
only gives the stress and strain for elements and not at nodes. Any help
would be highly appreciated. Please consider that I am a new abaqus
use.

Thank you in advance

Hello again

Im running a simulation on Abaqus and i got the next text message:

Abaqus Error: The executable C:\SIMULIA\Abaqus\6.11-PR3\exec\standard.exe 

aborted with system error code 884. 

Please check the .dat, .msg, and .sta files for error messages if the files 

exist.  If there are no error messages and you cannot resolve the problem, 

please run the command "abaqus job=support information=support" to report and 

save your system information

I want to find effect of transverse crack on rotating shaft by using ANSYS software, I trying modal analysis but couldn't get results, so plz if somebody have tutorials for modal analysis of cracked rotor then plz send me.

Dear All,

Anyone know how to assign surface contact properties to all elements in Abaqus?

i.e. all elements have contact (cohesive) properties on each boudary, so a crack propagates following those boundaries without defining pre-known crack path.

Does Abaqus support those automatic insertion fuction since manually inserting properties to all elementary boundaries is non sense...

Thank you in advance,

Joon

 I am using XFEM in ABAQUS to simulate crack growth from one material to another. Although the crack passes through the interface, the simulation stops after crack growth of few more elements with this error:

"THE FRACTURE CRITERION f=1.5400 AT ELEMENT 2469, THE DAMAGE INITIATION TOLERANCE HAS BEEN EXCEEDED AND CUTBACK IS REQUIRED."

 This element is the one right next to the crack front.

 I have tried to increase the damage initiation tolerance > 0.5 and the crack grows one more element and then same error.

Dear Sir

  My user id is NITIN JOHRI. I have an urgent problem of not being able to understand downloaded paper

on account of No figures in downloaded paper from imechanica.org---"  C.E. Inglis, “Stresses in a

plate due to the presence of cracks and sharp corners".

Kindly provide/guide some solution, or link for figures stated in paper(I am attaching this paper for your reference from your site).

Hi All

I am trying to obtain SIF value for a stationary crack using XFEM in Abaqus.

I am using the 5th contour value and plotting against distance from crack front using excel.
The values are from History Output.

 I am getting a very funny graph that is going up and down.