This is the first time that I write in this forum so I dont know if you would understand my questions but I will be very gratefull if you could response to them.
Im doing a project about crashfoam and Im simulating foam materials in Ansys. Ive done different simulations with different materials models. The material models that Ive used are Mooney_Rivlin, Blatz-ko, Ogden foam... With Mooney_Rivlin model the approximation to my experimental curve is very similar but in the case of the Ogden hyperelastic foam model this approximation is only valid with one of the foams that I want characterized. In the case of the Poliurethane and the EPS the adjusment of this model and the experimental curve is so bad.
How this can be due?