#250 Add a new inelastic flow to the StandardElastoViscoPlasticity brick

[Jeremy Hure]

Add a new inelastic flow to the StandardElastoViscoPlasticity brick : HarmonicSumOfNortonFlows where 1/\dot{p} = \sum_i 1/\dot{p}_i, each \dot{p}_i corresponding to a Norton flow

inelastic_flow : "HarmonicSumOfNortonFlows" {
criterion : "Mises",
isotropic_hardening : "Voce" {R0 : 200, Rinf : 100, b : 20},
kinematic_hardening : "Armstrong-Frederick" {
C : "1.e6 - 98500 * (T - 100) / 96",
D : "5000 - 5* (T - 100)"
},
K : {K1,K2},
Kn: {n1,n2},
Ksf : 3
}

[Helfer Thomas]

Hi Jérémy,

The following code barely compiles using the master branch (under deployement, available in github in a few minutes):

@DSL Implicit;

@Behaviour test;
@Author Thomas Helfer;
@Date 02 / 11 / 2020;
@Description {
}

@Algorithm NewtonRaphson;
@Epsilon 1.e-14;

@Brick StandardElastoViscoPlasticity{
  stress_potential : "Hooke" {young_modulus : 150e9, poisson_ratio : 0.3},
  inelastic_flow : "HarmonicSumOfNortonHoffViscoplasticFlows" {
    criterion : "Mises",
    A : {8e-67, 8e-67},
    K : {1,1},
    n : {8.2,8.2}
  }
};

I have not tested it yet though. Would you check the file TFEL/Material/HarmonicSumOfNortonHoffViscoplasticFlows.ixx where the work is done, in particular the computation of the derivative ?

Then we shall set up appropriate tests.

Best,

Thomas

[Jeremy Hure]

Hi Thomas,

seems ok to me,

Best,

Jérémy

[Helfer Thomas]

@jhure Ok I'll make some early tests then.