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Damage modeling in ABAQUS

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karn002
Posts: 19
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Hi, I wanted to clarify a doubt I have while implementing damage models in ABAQUS EXPLICIT

Could any one tell me which of these two relations are correct

SIG_n+1 = SIG_n + STIFFNESS_n+1*(INC_STRAIN_n+1)

OR

SIG_n+1 = STIFFNESS_n+1*(STRAIN_n+1)

It is apparent that the first of the above two seems correct, but with increase in damage the stress levels do not drop to zero, even if damage was set to 1 it remains at a level when damage was first initiated. I wanted to know how should one bring the load carrying capacity to zero when complete damage has occurred.

If the second one is used this is not a problem, but the formulation does not seem correct

Thanks

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lynx
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 lynx
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A hyperelastic approach will always compute stresses from an elastic potential.

Within damage mechanics, this elastic potential is deteriorated with multiplying it

(1-D). So the second form is OK.

I can suggest you my own manuscripts on ABAQUS implementations of damage models. after they are published 😀

Kumar

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karn002
Posts: 19
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(@karn002)
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Joined: 12 years ago

thanks

Thanks, for the reply

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karn002
Posts: 19
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could you send me the references

Hi Kumar, could you send me the references of your publication

Thanks

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manphetah
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Please nobody help me

Hi every one would you tell me whats going on ?

Actually i teach abaqus in our university but i am like no idea about element re movement in abaqus. how can i start to learn element re movement. if there is any file or any sample of cae file which you used before it will be a great honor if you help an undergraduate student

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manphetah
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Again

I mean like this picture that i attached

Please please please ......

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kiranckst
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There are a number of examples of element removal in the Abaqus manual, have a look at the Rigid projectile impacting eroding plate example.

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