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characteristic length

dithoap's picture

Characteristic length in ductile damage model in ABAQUS

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Hi All,

 

I want to model a dogbone specimen made from polycarbonate.

I model it using linear elastic plasticity coupled with ductile damage model.

For the damage, we are going to use the tabular form to described the damage evolution d with respect to equivalent plastic strain epsilon_p.

In abaqus, it is written that we need to input the d with respect of equivalent plastic displacement (u_p) instead of epsilon_p via equation u_p = epsilon_p \times L; where L is the characteristic length.

 

characteristic Length

Hi

 

is there a way to get the characteristic length of one element? I wanna calculate xult (when the element is cracked, fracutred..). 

 I use the concrete damage plasticity model and after reaching the tensile strength i assume a linear softening with fracture energy.

 

Input are:

   Young´s modulus

   max. tensile strength

   fracture energy

 

Outpu:

   when do i reach xult or what is the plastic strain equivalent

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