Ss. Pageau et al., SINGULAR ANTIPLANE STRESS-FIELDS FOR BONDED AND DISBONDED 3-MATERIAL JUNCTIONS, Engineering fracture mechanics, 52(5), 1995, pp. 821-832
Antiplane shear solutions are given for the asymptotic stress field ar
ound an internal point in an elastic, isotropic solid where three wedg
es of different materials meet. The three interfaces are either all pe
rfectly bonded or a disbond is introduced along one interface. One fea
ture of this three-material junction that is not present for the corre
sponding two material case, is that each interface is geometrically di
fferent, and therefore, the singular behavior is dependent on which in
terface is disbonded. Each material and geometrical combination theref
ore gives rise to four problems; one with perfect bonding at all inter
faces and three cases of an interface disbond. Numerical results are p
resented for selected three-material junctions. Numerical results show
that singularities can be much more severe in three-material junction
s than in two-material junctions. The results also show the importance
of providing the associated angular variations of the fields which ca
n be drastically different for two cases with very similar geometries
and identical orders of singularity.