HI sir,

Thanks for the response, Have you done any quasi - static indentation analysis, can you please share me the procedure or input file for doing it please... I am a student and i am in the deadline of submission of my thesis....

1) Increase time in step module and 2) use "ramp" in load module

Thank you Sergey sir,

Should I use static general or dynamic explicit for quasi static indentation test??

Then how to apply the loading, using velocity or displacement??

Hi Nagalingam,

For modeling quasi static analysis you may use both Standard and Explicit, and the latter may have some advantage in computation cost, while more difficult to adapt loading path (time of the applied load should be sufficiently large). If you begin with Abaqus Standard, then also choose sufficient time in Step module. When apply displacement with the desired time-amplitude avoid jumps.

Sergey and shahriyar sir, 

I have few more doubts too as I am a student, 

I am doing quasi static ind test in 3d model using honey comb and facesheet, I dont know when to stop my experiment....Ie i conduct the experiment by giving 0.5mm/min....so in abaqus under BC , should I give it under displacement or velocity...

After applying it, the model runs and my honeycomb deforms, then abaqus processing is completed, so how do I find that when to stop my process..... my indenter has not fully gone inside the honey comb, half of the honeycomb only gets deformed, please help me...

I would start with BC Displacement/Rotation specifying either Ramp displacement variation or via Amplitude. In both these cases displacement magnitude should be the indenter speed multiplied by time. To increase indentation depth (= displacement magnitude) just increase time in step module.

Thank you sir,

I tried it, indentation depth is increasing, but during that time I get a warning convergence judged unlikely..... Then it shows FORCE equilibrium accepted using alternate tolerance...

So is that a problem??will my solution converge??

If abaqus accepts an iteration as converged, you can usually trust the results unless you have changed the iteartion or solver controls by hand. The Abaqus default values for convergence tolerances etc. are usually rather conservative. Alternate tolerance messages can usually be safely ignored.

You have to change 1) elements with reduced integration to full integration in mesh module: Assign element type - Uncheck Reduced integration and herein also Distortion control - Yes (don't change 0.1) that should be done for the elements in the questionable region  2) in step module: Step - Other - Matrix storage - Unsymmetric

Good luck