Hello,
I am trying to understand how abaqus calculates ALLSE (recoverable strain energy) i.e. what is the theory/equation behind it?
I want to replicate the same in MATLAB and to do that, learning the theory is important. I thought it uses a damage model like here (https://abaqus-docs.mit.edu/2017/English/SIMACAETHERefMap/simathe-c-energybalance.htm) and ALLSE is nothing but the expression for E_E in this link.
However, if the simulation does not contain any damage, then we CANNOT use this formulation. What formulation then ABAQUS follows to calculate ALLSE?
I have one update. Abaqus uses:
U=1/2*stress*strain*volume to calculate the strain energy (U) of an element. When it is summed over all the elements, we get the total strain energy.
However, this is true only up to the elastic limit. After elastic limit, this equation keeps increasing in linear fashion, rather the ALLSE value of abaqus increases very slowly. Can anyone give more update? Thanks!
Did you check the theory manual? It contains lots of information on the mathematics behind all the calculations.
@Martin Baeker Yes I checked. It contains lot of information, but the model it talks about contains damage. In my numerical simulation, there is no damage so I could not use that theory.
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