PSI - Issue 32

A.S. Shalimov et al. / Procedia Structural Integrity 32 (2021) 230–237 Shalimov A.S., Tashkinov M.A. / Structural Integrity Procedia 00 (2019) 000–000

235

6

Fig. 7. Tensile loading curves for numerical models of the same volume fraction of inclusions with different matrix material models.

Figure 8 represents loading curve for RVEs with two considered elastoplastic numerical models of matrix with different inclusion volume fractions. Obviously, the higher volume fraction of the porous phase should result in the lower stiffness of the RVE. However, it was shown that influence of the morphological composition on the overall stiffness of the structure can also play a significant role. This can be evident in the case study presented on Figure 8, the curve for the structure with volume fraction p=0.665 is positioned significantly higher on the plot than the curve for the structure with almost the same volume fraction p=0.664. The influence of the volume fraction and morphology is also observed for loading curves for elastoplastic numerical models with damage. It can be noticed that the sequence of the curves for this model on the graph also does not follow the volume fraction pattern, same as for the elastoplastic model.

Fig. 8. The loading curves for elastoplastic numerical models and for elastoplastic numerical models with the procedure of degradation of properties, RVEs with different volume fractions of inclusions. The loading curves for the elastoplastic numerical models with damage for tension and compression are