PSI - Issue 68

Victor Rizov et al. / Procedia Structural Integrity 68 (2025) 146–152 V. Rizov / Structural Integrity Procedia 00 (2025) 000–000

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The diagrams in Fig. 2 represent variation of the SERR induced by change of parameter for different values of . The rise of the angle of support twist causes significant growth of the SERR (Fig. 2). The reduction of the SERR that is generated from increase of is a consequence of growth of the shear modulus in layer 1 of the beam. Fig. 3 shows variation of the SERR that is caused by two factors ( and ratio). ! ! ! ! ! ! !

! " " ! " #

! !

!

!#!!" $ = ! !

!#!!" $ = ! !

!#!!" $ = ! !

! !

Fig. 2. The SERR -

diagrams (curve 1 – for

rad, curve 2 – for

rad and curve 3 – for

rad).

! " " ! " #

The variation observed is characterized by reduction of the SERR with growth of both and

ratio

! !

!

(Fig. 3).

" ! = ! ! " " #

!

" $ = ! ! " " #

!

" $ = ! ! " " #

!

! !

Fig. 3. The SERR -

diagrams (curve 1 – for

, curve 2 – for

and curve 3 – for

).