P. Poonsawat et al., Stress singularity analysis of a crack terminating at the interface of an anisotropic layered composite, J APPL MECH, 65(4), 1998, pp. 829-836
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
The order of stress singularities at the tip of an inclined crack terminati
ng at the interface of an anisotropic layered composite is investigated. Bo
th fully bonded and frictional interfaces are considered. The expressions f
or stresses and displacements are obtained by using the Stroh formalism. Th
e stresses at the crack tip are expressed in the form sigma(ij) = r(-k)F(ij
)(theta), where k is the crack-tip singularity. The singularity k is obtain
ed by solving a characteristic equation which incorporates the effects of t
he interface and the crack faces. The problem can be visualized as two wedg
es created by a crack, pressing on a half-plane. For the frictional interfa
ce, depending on the relative slip directions of the two wedges, both the c
ase of the two wedges slipping in opposite directions and the case of the t
wo wedges slipping in the same direction are treated. In the numerical calc
ulation of the singularities, a high modulus graphite/epoxy layered composi
te is used and the effect of the crack inclination on the stress singularit
y k is graphically presented. In general, there are three roots of k for th
e fully bonded interface, while there are only two roots of k for the slipp
ing interface.