I suggest to ask all mathematicians not just, Sirs!

My friend, Don't take it seriously.

You need to provide a value at zero strain for all temperature values.

Thankyou for the reply sir Martin Baeker

Well i m not using temperature data sir. Its only stress and strain.....please read my query once again.

You have three columns - so I assumed that the third is temp, as in Abaqus - what else?

Martin Baeker

Sir i am unable to make proper data from the mathematical model. i tried different model but every time i am asked to arrange the data in ascending order ...when i provide my data from the yield stress( 0.4fck) please can you help.

Dear Arnab, the data you are providing to abaqus is for incremental plasticity. As the name suggests as well as the error the true stress can only increase with increasing plastic strain. If it decreases the hardening parameter used to update the stress values will be negative and may result in infinite stress.

This is not what you want to know...But you are fighting a mathematical model against another.

As pointed out by @Martin there appears to be a third column. So for each new value of third coloumn you have to start with zero strain value.

Thank you very much for responding sir.

But still i am not clear with the answer since i am beginner to ABAQUS. Sir can u explain me in bit detail. If you have any excel file to calculate the data then can you please share.

I have attached a file where i calculated the data...but i am unable to figure out where i am wrong. Waiting for your response....thankyou!!

Abhishek Tiwari

Thank you very much for responding sir.

But still i am not clear with the answer since i am beginner to ABAQUS. Sir can u explain me in bit detail. If you have any excel file to calculate the data then can you please share.

I have attached a file where i calculated the data...but i am unable to figure out where i am wrong. Waiting for your response....thankyou!!

Jafar Biazar , are any of Sirs on RG yet!!

By the way, in India sometimes there can be more than one 'sir' in a sentence. Its kind of a dialect...in south India there can be more than 5 sirs in a sentence :).

@Arnab I am not aware of the model you are using. Also I see a column 'dc' in your excel file. You have used that as input in Abaqus it seems.

If it is a concrete model you want to simulate you may use Damage Concrete Plasticty. Concrete is also not my field but for stress softening you will have to you use either damage, any inbuilt model in abaqus or you will have to define you material law using subroutines.

In all these cases, Abaqus manual can help you. Also look for example problem manual of abaqus.

Regards

Abhishek

It would be best to post the corresponding lines from your inp-file because the problem seems to be with Abaqus syntax.

Concerning the use of "Sir": The problem with that is that there are actually female scientists...

Martin Baeker

Sir for your reference i have attached the stress strain data, and also the calculated damage data, that i wanted to use for analysis. Can you please check where is the fault in the data

As I said, you need to upload the relevant parts of your inp-file since this is a problem with abaqus syntax.

Or you read the manual to see what the columns in the plasticity potion mean...