TimeIntegrator Use

[hafjoy]

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Question

Hi, I do not understand when does the time integrator scheme in the executioner block come into play. When I'm using a material class like FiniteStrainPlasticMaterial and I'm calculating a _Jacobian_mult[_qp] is this unnecessary then if I consider an explicit scheme and what is it used for when I have getJac function ? Thanks for any help