PSI - Issue 33

Domenico Ammendolea et al. / Procedia Structural Integrity 33 (2021) 858–870 Domenico Ammendolea et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 4. (a) Rectangular plate with a central and inclined crack. (b) Mesh frames used in numerical simulations

Besides, Fig. 5-a reports the remeshing events (marked by a circle in the SIFs curves) that occurred during the simulations. Fig. 5-b illustrates the mesh motion during two consecutive remeshing events, which are evidenced in Fig. 5-a, by a ’ and a ’’. Notice that a ’ represent s the mesh frame after a remeshing event, while a ’’ denotes the mesh evolution from a ’ up to a new re -mesh action. The results show that the proposed model predicts SIFs quite accurately. In this framework, the refined mesh ensures the best prediction. However, it is worth noting that the results achieved by the coarse mesh are acceptable as well, thus denoting the capability of the proposed strategy to ensure good prediction also by using raw mesh frames, which are computationally cheapest. Such a result is quite clear by comparing the computational time spent to perform the simulations as well as the total number of remeshing events involved. The time spent by the refined mesh is almost 4 times bigger than that of the coarse one.

( ) I II F F K K T T L H E L    =  − ( )( ) 0 ( ) II 2 I

Fig. 5. Comparison in terms of dimensionless SIFs (FI, FII, with

 ) between the present method and

the reference solution reported in (Murakami and Aoki (1987)). (b) A schematic of the mesh movement.