Results of the calculations and their comparison with the results of experimental research

Table 8.2 compares the values of material parameters of the foams determined in the course of experimental research through axial compression and calculated on the basis of the equation:

with the results of numerical calculations with the use of the finite elements method.

On the basis of the compiled values, it can be seen that the results of the numerical calculations of parameters ц and a are about 7-9 % larger in relation to the results of the analytical calculations. In the case of parameter в, numerical calculations provided a result smaller by about 22 % in relation to the analytical calculations. The presented solutions are therefore valid and can be used for analysis of stiffness of more complex multi-layer sets.