PSI - Issue 26

Victor Rizov et al. / Procedia Structural Integrity 26 (2020) 75–85 Rizov/ Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 5. The strain energy release rate in non-dimensional form presented as a function of M N / ratio (curve 1 - at

20 = N N, curve 2 - at

30 = N N and curve 3 - at

40 = N N).

0 / D B ratio on the longitudinal fracture behaviour is evaluated. For this purpose, the strain

The influence of

0 / D B ratio in Fig. 3 at three values of m

energy release rate in non-dimensional form is presented as a function of

0 / D B ratio. The curves in

. It can be seen in Fig. 3 that the strain energy release rate increases with increasing of

Fig. 3 show that the increase of m leads also to increase of the strain energy release rate. The influence of the sizes of the cross-section of the beam on the longitudinal fracture is evaluated too. For this purpose, calculations of the strain energy release rate are carried-out at various h b / ratios. The results obtained are reported in Fig. 4 where the strain energy release rate in non-dimensional form is presented as a function of h b / ratio at three values of material property, n . One can observe in Fig. 4 that the strain energy release rate decreases with increasing of h b / ratio.

Fig. 6. Geometry and loading of inhomogeneous beam with longitudinal crack reaching the left-hand end of the beam.

The strain energy release rate increases with increasing of n (Fig. 4). The effect of the loading conditions on the longitudinal fracture is investigated by calculating the strain energy release rate at various M N / ratios. The calculated strain energy release rate is presented in non-dimensional form as a function of M N / ratio in Fig. 5 at three values of N . The curves in Fig. 5 indicate that the strain energy release rate increases with increasing of M N / ratio and N .