PSI - Issue 18

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D.A. Bondarchuk et al. / Procedia Structural Integrity 18 (2019) 353–367 D.A. Bondarchuk, B.N.Fedulov, A.N. Fedorenk / Structural Integrity Procedia 0 (2019) 000 – 000

Fig. 4. Stress distribution in sample after polymerization and before cut.

The results of simulation - maximum and minimum stress in composite (σ 11 , σ 22 , σ 33 , σ 13 along free edge thickness) in a local coordinate system before and after cut is shown in Fig. 5 for different finite element mesh. It is worth to note, that σ 11 , σ 22 , σ 33 stress components, arising in the sample during polymerization (before cut), are not as sensitive to the size of the mesh as stresses after cut. The only exception is for the maximum σ 22 through the sample thickness. Note also that, with an increase in the number of elements per layer, a slight monotonous increase in maximum stress through thickness before cut is observed in Fig. 5 (a, e). On the contrary, with an increase in the number of elements per layer, an evident monotonous decrease in maximum stress through thickness before cut is observed in Fig.5 (i, m). The difference in maximum absolute σ 13 stress before cut for 32 elements per composite layer and 1 element per layer is about 35%.