PSI - Issue 83

Victor Rizov et al. / Procedia Structural Integrity 83 (2026) 85–94

92

 in Fig. 3 induces larger growth of SERR in comparison with growth in SERR induced by the same increase of  in Fig. 2. In other words, the SERR is more sensitive to acceleration of the beam at its motion upward along axis, s , compared with angular velocity of the beam at its rotation around s . The influence of beam geometry on the SERR under creep is studied too. Graphs illustrating this influence are shown in Figs. 4 and 5.

0.6   (graph 1),

1.0   (graph 2) and

1.4   (graph 3).

Fig. 3. Change of SERR with time at

b h

b h

b h

1.3 

1.5 

1.8 

Fig. 4. Change of SERR with time at

(graph 1),

(graph 2) and

(graph 3).

The influence of h b / ratio is studied first. For this purpose, the change of SERR with time at three h b / ratios