Numerous cracks can be observed in the top coat of thermal barrier coatings (TBCs) deposited by the atmospheric plasma spraying (APS) method. These cracks can be classified into vertical and horizontal ones and they have opposite impact on the properties of TBCs. Vertical cracks reduce the residual stress in the top coat and provide strain tolerance. On the contrary, horizontal cracks trigger d...

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By partitioning the total stresses in a damaged composite into either mechanical and residual stresses or into initial and perturbation stresses, it was possible to derive several exact results for the energy release rate due to crack growth. These general results automatically include the effects of residual stresses, traction-loaded cracks, and imperfect interfaces. By considering approximate...

Related Articles Can surface cracks and unipolar arcs explain breakdown and gradient limits? J. Vac. Sci. Technol. A 31, 011302 (2013) Mechanically robust silica-like coatings deposited by microwave plasmas for barrier applications J. Vac. Sci. Technol. A 30, 061502 (2012) Spatially resolved measurements of ion density and electron temperature in a dual-frequency capacitively coupled plasma by ...

Related Articles Can surface cracks and unipolar arcs explain breakdown and gradient limits? J. Vac. Sci. Technol. A 31, 011302 (2013) Mechanically robust silica-like coatings deposited by microwave plasmas for barrier applications J. Vac. Sci. Technol. A 30, 061502 (2012) Spatially resolved measurements of ion density and electron temperature in a dual-frequency capacitively coupled plasma by ...

-Properties of elastic solutions to interface crack problems are discussed in both the open formulation, in which the crack faces are assumed to be traction-free and interpenetration is permitted, and the unilateral formulation, where a contact zone is generally established adjacent to the crack tips. It is shown that if the contact zone is sufficiently small compared with the other dimensions ...