Week - 10 Hyperelastic Material Models

Aim :

Given the material data below, calculate the Mooney Rivlin and Ogden material constants and compare the both using stress-strain data from a Dogbone specimen tensile test with 100 percent strain. The given data is the engineering stress-strain in MPa/(mm/mm). The comparison should be shown from the d3hsp file and using simulation.

Solution :

First we will convert the following into excel sheet data :

We create the following material card as shown below :

We have inserted the following stress strain curve :

Now we have derived the data from the simulation and put it into the excel file as shown below :

After converting into engineering stress and strain and comparing it with the stress strain curve raw we get the following :

We also get the following data for the hyperelastic material card:

Mooney constant c1 = 0.1756E+00

Mooney constant c2 = 0.1494E+00

Now we use ogden material card as shown below :

After running we get the following results :

Now we have derived the data from the simulation and put it into the excel file as shown below :

Conclusion

Therefore we can conclude from the graph that hyperelastic material card is more accurate for the same number of coefficient to the raw material data .