PSI - Issue 80

6

D.C. Gonçalves et al. / Procedia Structural Integrity 80 (2026) 443–450 Author name / Structural Integrity Procedia 00 (2019) 000–000

448

The resistance curves, defined by the energy release rates plotted with crack length, are presented in Fig. 5. Since this is a pure mode I application, the energy release rate is also defined by the J integral values. Before crack initiation, J increases with no increase in . Then, a step in J is observed as increases, defining the critical energy release rate considered in (10). It is also noticeable in Fig. 5a and Fig. 5b the mesh and radius independence on the J integral calculation

Table 1 - Maximum experimental and numerical loads !"# [N] 103.2

Error [%] -

Experimental

NNRPIM - Mesh 1

102.2 101.7 101.0 100.3

-0.99 -1.42 -2.08 -2.76

NNRPIM - Mesh 2 - R1 NNRPIM - Mesh 2 - R2 NNRPIM - Mesh 2 - R3

(a)

(b)

(c)

(d)

Fig. 4. Load-displacement curves considering Mesh 1 (a), Mesh 2 and Radius 1 (b) , Mesh 2 and Radius 2 (c) , Mesh 2 and Radius 3 (d)