PSI - Issue 77

Victor Rizov et al. / Procedia Structural Integrity 77 (2026) 382–388 Author name / Structural Integrity Procedia 00 (2026) 000–000

386

5

bda dU *

G

=

,

(23)

* U is the complementary strain energy in the beam.

where a is the crack length,

3. Numerical results In this section of the paper, we present numerical results for the strain energy release rate in form of various graphs.

5 = M Nm).

3 = M Nm and curve 2 - at

Fig. 3. The strain energy release rate versus time (curve 1 - at

0.3

0.6

0.9

Fig. 4. The strain energy release rate versus 1 f (curve 1 - at

2 = f

2 = f

2 = f

, curve 2 - at

and curve 3 - at

).

0.6 = β n ,

0.7 = γ n and

0.006 = b m,

0.300 = l m,

0.100 = a m,

0.010 = h m,

We assume that 0.8 = i g where

1,2,3,4 = i . By the graphs shown in Fig.3, Fig. 4 and Fig. 5, we visualize the effects of time and other factors on the strain energy release rate in the beam construction under consideration. We investigate the effect of time on the strain energy release rate at two values of M . Figure 3 shows the strain energy release rate versus the time. It can be observed that the strain energy release rate continuously grows with