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Porcine aorta wall modelling non convergence

Porcine aorta wall modelling non convergence

Porcine aorta wall modelling non convergence

(OP)
Hi, I am trying to verify a material model from previous literature, a 5 coefficient mooney rivlin hyperelastic model which I have implemented in abaqus as a polynomial hyperelastic model. However i keep getting the too many increments error indicating non convergence. Im quite new to abaqus and i am not sure where to head next. I have a 5mm squared sample of tissue with 0.06mm thickness. i want to model biaxial loading of the sample and so have applied boundary conditions to two sides of the sample and the opposite sides are loaded with a negative pressure force of 1MPa.  any help would be fantastic.

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