Issue 54

F. Benaoum et al, Frattura ed Integrità Strutturale, 54 (2020) 282-296; DOI: 10.3221/IGF-ESIS.54.20

zone is 0.05 mm). Various mesh schemes are tried to achieve convergence. The optimized model has 18,263 nodes, 18,200 elements. The mesh model with the boundary and loading conditions are given in Fig. 2b. The theory of incremental plasticity is introduced to modelling the material nonlinearity. The iterative method of Newton–Raphson is used as an approach to solve nonlinear equations by finite elements.

W

Crack

e a

e p

L p

L 1

D S

L 2

(a)

Load

Ux = 0 

Crack 

Ux = Uz = 0 

(b)  

CFRP

Adhesive

(c)

Figure 2: (a); Illustration of the specimen geometry with the boundary conditions and loading condition, (b) Meshing of unpatched cracked specimen and (c) Meshing of patched cracked specimen.

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