Issue 52

M. Fouzia et alii, Frattura ed Integrità Strutturale, 52 (2020) 281-298; DOI: 10.3221/IGF-ESIS.52.22

the parts at these locations resulting in a minimum peeling stress zone. The shearing is lesser with the presence of the bolts.

Figure 11(a) : Longitudinal stress distribution (S12).

Figure 11(b ): joint bending

(a) (b)

Figure 12 : Stress distribution in the adhesive under 14kN applied load. (a) Peeling stress ( S 33 ) in the adhesive; (b) Shear stress in the adhesive (S13)

O PTIMIZATION USING G ENETIC A LGORITHM GA

T

he objective of the optimization is to minimize the total displacement Δ l in the substrates of the hybrid assembly due to an applied tensile stress f. The objective function is then the displacement which is calculated by Yamaguchi and Amano’s theory [12]. The total displacement ∆ is given by:

(

)

(

)

2

2

(

)

total  = l



G b l n −

. / 4 



+

. . . / 4. 



f e

. .

/ .

k G n

(16)

A

B

with

(

) ( ) u eC

(

)

(

)

2 / 4 /

k G bL n = −



(17)

A

291