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This article provides a comprehensive treatment of cracks in non-homogeneous structural materials such as functionally graded materials (FGMs). It is assumed that the material properties depend only on the coordinate perpendicular to the crack surfaces and vary continuously along the crack faces. By using laminated composite plate model to simulate the material non-homogeneity, we present an algorithm for solving the system based on Laplace transform and Fourier transform techniques. Unlike earlier studies that considered certain assumed property distributions and a single crack problem, the current investigation studies multiple crack problem in the FGMs with arbitrarily varying material properties. As a numerical illustration, transient thermal flow intensity factors for a metal-ceramic joint specimen with a functionally graded interlayer subjected to sudden heating on its boundary are presented. The results obtained demonstrate that the present model is an efficient tool in the fracture analysis of non-homogeneous material with properties varying in the thickness direction.
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참고문헌 (14)
참고문헌 신청
Saito, M / 1990 / Development of Small Punch Test Procedure for FGM Fabrication / FGM-90, Proc. Fist Int. Symposium on Functionally Gradient Materials, FGM Forum :297~305
Jin, Z. H / 1993 / Minimization of Thermal Stress Intensity Factors for a Crack in a Metal-Ceramic Mixture / Ceramics Transactions Functionally Gradient Materials 34
Jin, Z. H / 1993 / An Internal Crack Parallel to the Boundary of a nonhomogeneous Half Plane Under Thermal Loading / International Journal of Engineering Science 31:793~806
Noda, N / 1993 / Thermal Stress Intensity Factors for a Crack in a Functionally Gradient Material / Journal of Solids and Structure 30:1039~1056
Noda, N / 1993 / Steady Thermal Stresses in an Infinite Non-Homogeneous Elastic Solid Containing a Crack / Journal of Thermal Stresses 16:181~197
Jin, Z. H / 1993 / Minimization of Thermal Stress Intensity Factors for a Crack in a Metal-Ceramic Mixture / Ceramics Transactions Functionally Gradient Materials 34
Jin, Z. H / 1993 / An Internal Crack Parallel to the Boundary of a nonhomogeneous Half Plane Under Thermal Loading / International Journal of Engineering Science 31:793~806
Noda, N / 1993 / Thermal Stress Intensity Factors for a Crack in a Functionally Gradient Material / Journal of Solids and Structure 30:1039~1056
Noda, N / 1993 / Steady Thermal Stresses in an Infinite Non-Homogeneous Elastic Solid Containing a Crack / Journal of Thermal Stresses 16:181~197
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