Issue 51

A. Chikh, Frattura ed Integrità Strutturale, 51 (2020) 115-126; DOI: 10.3221/IGF-ESIS.51.09

4.75

4.50

4.25

K w K w K w K w K w

=0

4.00

=10 =20 =50



3.75

=100

3.50

3.25

3.00

0.0 0.5 1.0 1.5 2.0 2.5 3.0

/  2

K p

4 2 

AL EI

c 

Figure 4: Variation of the nondimensional fundamental frequency

of isotropic homogeneous beam with

 

4

p K and Winkler parameter

w K .

Pasternak parameter

18

12

Mode (m=1) K w =0 K w =10 2 K w =10 3

6

0

0,0

0,5

1,0

x/L

Figure 5: Mode shape of w at the base surface of the beam with various aspect ratios for the first mode frequency   2 1 , / 20 , / 2.5 p m L h K    

123