mgothn@yahoo.com [Abaqus] | 23 Oct 23:06 2014
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Unexpected shear stresses from friction model

 

Hi guys, 

I am having problems establishing a simple 2D friction model in Abaqus between two rectangular elements (concrete and steel). I am using a vertical contact pressure on the steel surface and a frictional coefficient between the two surfaces of 0.45. 
I have defined the frictional coefficient in the contact properties as a "Penalty" and used "Normal" and "Tangential behaviour". At last I have defined a horizontal displacement to the steel part. 

When I run the model and plot my results I get a linear displacement curve which is expected but my shear stress also happens to be linear which it shouldn't. Also, the shear stresses are zigzagged and therefore non-monotonic which is a problem. My objective in this model is to get a plot similar to Figure 12-5 in the "Getting Started with Abaqus" manual. 
Can you help me? 

Note: I am sure that my BCs are correct. I have run the model with 200 increments and used a fine mesh too.


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Posted by: mgothn <at> yahoo.com
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XFEM

 



Dear All

I want to know how to model the concrete crack propagtion of crack by ABAQUS in details
THANKS

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Posted by: Amr Mohamed <amr_civil77 <at> yahoo.com>
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Hi guys

 

Hello everybody
Iam trying to model a one-way rc slab with opening and strengthening that opening with CFRP sheets so any one know how to model the cohesive layer between the cfrp and concrete ?? Please help me

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Posted by: Wael Saad <wael_alawsey2004 <at> yahoo.com>
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Material definition

 

Hello everybody, For my thesis I'm working with a material that shows very different tensile and compressive properties. I'm relatively new to Abaqus and I'm having some difficulties in getting the material properties into my model. In compression: E = 1400MPa until average stress is 62MPa then stiffness gets lower until the strain is -0.13. At this point the E = 130 MPa until the material collapses at 0.3 strain. IN tension: E = 8400MPa until brittle failure at 130MPa. What would you guys suggest on how I could define this kind of material in Abaqus? Thanks in Advance!

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Posted by: Wiltore <georgwilte <at> fsipeurope.com>
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how to draw a 2D / 3D yield surface / yield locus

 

Greetings,

I'm writting Tsai-Wu yield criteria for my analysis. And anybody have experience or information "steps to draw a yield surface based on the any yield criteria" from the abaqus results S11, S22, S33 and so on.

Your helps highly appreciate it.

Regards.
thengpin87 <at> yahoo.com


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Posted by: thengpin87 <at> yahoo.com
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Damage initiation and evolution

 

Hi all, I have to work with Abaqus/Standard to analyze the strength and strain capacity of a mechanical component. I have tried to add damage initiation and damage evolution options to my input file (in material behavior section), but the model shows the same response with and without these criteria ! I show you which options i have added to my model: ... ... ... *DAMAGE INITIATION, CRITERION=DUCTILE [different values of failure strain, triaxiality as indicated in Abaqus guide] *DAMAGE EVOLUTION, TYPE=DISPLACEMENT, DEGRADATION=MAXIMUM 0.1 ... ... ... Can anyone of you help me telling if there are errors and/or lacks in the definition of these criteria? Thank you so much for the attention and kind regards!!! Luca --

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Posted by: Liukabq <luca_catena <at> live.it>
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error: XML parsing failure

 

Hi there, has anyone ever encountered the following error message?


‘XML parsing failure for job elastic_Ti_Poisson_032.  Shutting down socket and terminating all further messages.  Please check the .log, .dat, .sta, or .msg files for information about the status of the job.’


Sometimes I just change the job name and it works, but sometimes it doesn't. Any advice on this problem?


Thanks,

Yong


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Posted by: yongchao_huang <at> yahoo.com
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joedks@yahoo.com [Abaqus] | 14 Oct 17:10 2014
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Changing the dimension of a part orphan meshed in inp file

 

Hello, every one. Could any one please give me some advice on how to scale a part in an input file?

I've tried using a script to scale xf, yf and zf for a simple geometry before but this time I want to only scale certain bits of the part. Does any one know how this can be done? The part that I am working on is a T-joint fillet welded plate and I am trying to re-size the thickness of the stiffener without changing the thickness of the plate. I don't have the cae file but only the inp file.


Kind regards,

Joseph Ahn

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Posted by: joedks <at> yahoo.com
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Error in Job..

 

Hi all,


I am a beginner in Abaqus. I made several models but when I run the job, it becomes aborted and the following message appears,


"Error in job Job-1: Unable to change the current working directory to C:\Users\Engineer\AppData\Local\Temp\Engineer_Job-1_7876."


My models are Ok because I have checked it on other computers. I installed several times the software but the problem still alive. I also tried  to change the working directory address through

Start menu>Abaqus>Right click>properties> Start In (new address).

Any try was that, I installed the so ftware in D-drive and making the Temp folder there for working directory, but same error I got. 


Can anyone guide me to overcome this issue.


Thanks in anticipation!

/Ali

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Posted by: danialalishah <at> yahoo.com
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How to get the sum of shear forces from curves surface?

 

Hi al, Im having some trouble with getting the sum of al shear components on a curved surface. Two curved surfaces with the same shape are connected with a cohesive surface interaction. Because of the two surfaces are being pulled out of each other this will result in shear and in normal forces between the surfaces. What I would like to see is the distribution between the shear and normal force. So how much of the total force is taken by shear and how much of the total force is taken by normal force. <http://abaqus-users.1086179.n5.nabble.com/file/n21965/Abaqus_problem1.png> Thanks in advance! --

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Posted by: Wiltore <georgwilte <at> fsipeurope.com>
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Sinusoidal Load

 

hello i need to apply a sinusoidal load, sigma= 200*sin (wt) where the amplitude is 200 MPA, w is the circular frequency in rad/s, t is the time in seconds so, i am having trouble with imposing it i even tried to take many values and model it as a tabular amplitude, it did not work though what i need to model is a 20 000 Hz frequency over 80 cycles --

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Gmane