Since this occurs already in the first increment, it is highly probable that there is some instability in the model. Set all loads and prescribed displacemnts etc. to zero and see if it runs then. Then add the loads. Also check all units, very often this happens because of inconsistent units in the material definition.

Hi Ashish Gupta

this error can occur in several cases. Firstly, it is better to clarify your modeling. then it will be easier to researchers to help you.

Best Wishes

I am modeling for pull out testing in abaqus. I have defined finer mesh in concrete cube nearby bar embedded and courser mesh in part of concrete cube. In step, I have used: time period=1, incrementation; initial=0.05, min.= 1E-009, max.=0.1

there is a diversion which could be loacaliezed material inelasticity or any other cause

Do you use any cohesive element?

hello dear friend

your analysis is explicit or implicit ?

in explicit analysis the error commonly not happen

do it in that way

@Khaled: No, I didn't provide cohesive element. In place of this, I used surface to surface interaction between bar and concrete by providing friction coefficient between steel and concrete 0.6

@Arash: My analysis is standard/explicit.

Since this occurs already in the first increment, it is highly probable that there is some instability in the model. Set all loads and prescribed displacemnts etc. to zero and see if it runs then. Then add the loads. Also check all units, very often this happens because of inconsistent units in the material definition.

Hello Ashish, when Abaqus gives this error, it means that it's trying to solve the problem but the initial increment size is bigger than the required one. So, you have to decrease the initial increment size in the step module. Sometime it could also be fixed with decreasing mesh size as well.

Its easy actually . 

First have a thorough check of your model. In case of model being perfect ,

• Go to step module , click on Other-General Solution Controls-Edit-Step which you created-Go to time incrementation-and change Ia to say 15. By default it is 5 , but 5 is too small for small pretty tough simulations.
• ABAQUS follows certain defaults and these needs to be changed for some bigger problems

Hope you got answer. Ping me if still not.

interested

Hello Ashish, did you solve the problem at last? I'm having the same problem as well.

Yes, I have solved that problem.

Hello Ashish, would you please tell me how did you solve the problem? I am having the same issue. DId you modify the model or others?

Hello Prosenjit, as this error comes due to various reasons like material properties, nature of forces, etc. So, it will be better to recheck the data that you have entered. After that, if it is not solved, then post the screenshot of the error page.

Hello Ashish Gupta,

I am getting the following error, Please review the screenshot of error page and complete MSG file and please let me know what to do.

Carefully look at the end state and at your material definition: If the material calculations fails, it means that Abaqus cannot calculate the stresses that correspond to the strains calculated during the Newton solver. This usually only happens if there is a huge jump in properties, like extremely high creep rates, strong thermal softening or something similar.

It is really annoying to see that you have solved the problem but you did not mentioned it here so that others can see too Ashish!!! Ashish Gupta

Hii, I had the same problem. You just need to go to the modal tree, select step in which the problem is occurring (say the step is 1) then right click select edit. In the incrementation tab you can further decrease the minimum increment size to any trial value which works for you and you can also change the initial increment size. SEE this if it works for you.

This worked for me, however the result was not the desired one.

Hi Arman Tatar,

Although the problem is solved, but the result needs to be more precise. During my analysis, I have checked the things one by one i.e. material properties, forces applied: static or dynamic etc. in sequence and then element and increment size. This is done because the problem mentioned in the question is not caused by only one reason.

As, I and other researchers have already mentioned these things in the previous comments, that's why, I didn't mention it again.

Hope, this answer will help the other ones to solve their problems.

dear all

please help me figure out i am having same problem. i rechecked multiple times material, load, mesh size, increment size.

Following..

Most likely this error depend on the problem type.

In my case elastic plastic material analysis like steel structure the stress-strain data need to be adjusted to accommodate the deformation that caused by the loads you are applying.

Also you have to look at the minimum and initial step size.

There is also default values in step manger option which control the number of iterations and so on you may increase that as well they limit that to 5 times. in large problems that may not be enough.

Regards.

Have a look at this document, it explains several issues that may be relevant:

https://www.researchgate.net/publication/328956103_How_to_get_meaningful_and_correct_results_from_your_finite_element_model

https://www.youtube.com/watch?v=sO6xh41Ns8I

i found this useful one

Sir I found the same type error. Please help me out. I shall be very grateful to you for this.

I also got same error issue. Mine starts from the beginning of job( 1U,2U,3U,4U,5U) then aborted. Please help me.

You should decrease the initial increment size from Step.

Dear Kadir Gunaydin

I decreased the initial increment size from Step( 0.01 to 0.001) but it does not work. Please check the attached JPG file. Thank in advance!

Try to increase attempt number. You should go Step Module-Other Tab-General Solution Controls-Edit-Step. Then you can increase the attempt number (IA) to a higher value like 30.

You can First of all check your Material Properties. Then, if material properties are correct, check interaction properties and if interactions are also ok, then finally try to mesh your model in parts by making partitions. The area of loading should have finer mesh. And if you are getting same error again, then try to remodel your problem.

dear Ashish Gupta

I suggest to increase the number of attempts (Ia) and to use a finer mesh in the contact zone !!

Good chance

You can try:

1. Increase IA (Step-Other-General solution control-edit step-specify-Time increment-more- change IA to the maximum value 30)

2. Refine the mesh in the contact regions to reduce the percentage of elements flipping in and out of contact.

3. Using mass scaling in Dynamic/Explicit to control the stable time increment.

If you are facing this kind of problem when using concrete damage plasticity model, please let me know.

***Our works can be followed here, we are looking forward to receiving your opinions.

1. https://www.youtube.com/watch?v=EkRoRR9oKUc&t=2s

2. https://www.youtube.com/watch?v=ID0DSkgazls