Page 268 - The Combined Finite-Discrete Element Method
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DISCRETE CRACK MODEL 251
(a) (b) (c)
(d) (e) (f)
(g) (h) (i)
Figure 7.20 Finite element mesh (mesh D) employed and fracture sequence obtained for
2γ = 30 N/m. The frames shown correspond to (b) t = 0ms, (c) t = 0.17 ms, (d) t = 0.27 ms,
(e) t = 0.28 ms, (f) t = 0.30 ms, (g) t = 0.31 ms, (h) t = 0.32 ms, (i) t = 0.50 ms; i.e. transient
loads (b) σ = 0MPa, (c) σ = 3.4MPa, (d) σ = 5.4MPa, (e) σ = 5.6 MPa, (f) σ = 6.0MPa,
(g) σ = 6.2MPa, (h) σ = 6.4MPa, (i) σ = 10.0MPa.
7.5
Fracture load MPa 2.5 5
30 N/m
3 N/m
0
0 0.5 1
Normalised size of finite elements
Figure 7.21 Fracture load as a function of the energy release rate and element size.
