In this study, a chain of numerical simulation programs is performed to determine mechanical properties of foamed polymer samples. First, an injection moulding process is simulated by using the software “Moldex3D” to acquire morphological properties, such as porosity and cell size distribution (Figure 1). Real manufactured components represent the empirical part of this study and are produced as reference. Thus, the structural characterization of the porosity and cell size distribution serves as a verification basis for the simulated data of “Moldex3D”. Subsequently, material and global mechanical properties such as cell size distribution as well tensile strength are modelled with the help of the software “Digimat”. This program combines the material processing data from the injection moulding simulation as well as from the Digimat material database itself, which are both required for the structural mechanics modelling (Finite Element Analysis). Tensile test is used to reverse engineer and therefore to optimize the digital material data of Digimat. In addition, an initially neutral receiver mesh obtains the process and material data from the process simulation (Moldex3D) and the material modelling (Digimat). Consequently, mechanical properties are digitally calculated and simulated by using the software “Marc” under tensile loading and verified with the comparison of the experimental results.