Issue 53

L. Hadid et alii, Frattura ed Integrità Strutturale, 53 (2020) 1-12; DOI: 10.3221/IGF-ESIS.53.01

Silver bonded to alumina is selected in this study. Pure silver is defined as an elastic - plastic material (Fig. 3) with a value of the modulus of elasticity E = 81.90 GPa and Poisson's ratio ν = 0.31. The behaviour of alumina is considered as an isotropic elastic material. Alumina is assumed to be elastic with modulus of elasticity value E= 390 GPa and Poisson’s ratio ν = 0.25.

Y

e 1

Metal

Defect

e 2

Ceramic

X

(b)

(c)

L

(a)

P

d

Path1

Interface defect

U Z =0

P

(e)

(d)

Figure 1: (a) A 2–D schematic view of metal/ceramic with the site of interface defect, (b) Geometry of model, (c) Finite element mesh, (d) Boundary condition and loading condition and (e) site of interface defect-defect interaction.

Figure 2: Effect of mesh size convergence on ceramic/defect interface for P = 70 MPa.

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