Field of residual stresses in a coating with crack
- 24 Downloads
We consider an object with coating deposited on its plane surface. The coating is subjected to the action of known uniform uniaxial tensile residual stresses. We analyze the field of residual stresses formed in the coating as a result of the formation of a long flat crack perpendicular both to the direction of action of tensile stresses and to the surface of the coating. The problem is studied in the two-dimensional statement. The stress field is investigated in the sections perpendicular both to the crack plane and to the surface of the coating. Two cases are analyzed, namely, the case of a through crack (through the entire thickness of the coating) and the case of a nonthrough crack with plastic zone on its continuation. The performed numerical analysis enables us to estimate the possibility of subsequent fracture of the coating after crack initiation.
KeywordsResidual Stress Crack Initiation Plastic Zone Substrate Interface Biharmonic Function
Unable to display preview. Download preview PDF.
- 1.B. Wielage, A. Wank, H. Pokhmurska, W. Kalita, and V. Chekurin, “Residual stresses optimization in laser remelted arc sprayed coatings,” in: Proc. of the IWKM 2003, D5 (November 2003), Mittweida (2003), pp. 91–97.Google Scholar
- 2.V. F. Chekurin and H. V. Pokhmurs’ka, “Mathematical model of cracking of laser-modified metallic powder coatings,” Fiz.-Khim. Mekh. Mater., 40, No. 5, 18–22 (2004).Google Scholar
- 3.K. A. Kitover, “On the application of special systems of biharmonic functions to the solution of some problems of the theory of elasticity,” Prikl. Mekh. Mat., 16, 739–748 (1952).Google Scholar
- 4.V. F. Chekurin, “Variational method for the solution of direct and inverse problems of the theory of elasticity for semiinfinite strips,” Izv. Ros. Akad. Nauk., Ser. Mekh. Tverd. Tela, No. 2, 58–70 (1999).Google Scholar