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The problem considered here is the response of a non-homogeneous composite materialcontaining some cracks subjected to dynamic loading.It is assumed that the composite material is or-thotropic and all the material properties depend only on the coordinate y(along the thicknessdirection).In the analysis,the elastic region is divided into a number of plies of infinite length.Thematerial properties are taken to be constants for each ply.By utilizing the Laplace transform andFourier transform technique,the general solutions for plies are derived.The singular integral equa-tions of the entire elastic region are obtained and solved by the virtual displacement principle.Attentionis focused on the time-dependent full field solutions of stress intensity factor(SIF)and strain energyrelease rate.As a numerical illustration,the dynamic stress intensity factor of a substratefunctionallygraded film structure with two cracks under suddenly applied forces on cracks face are presented forvarious material non-homogeneity parameters.
The problem considered here is the response of a non-homogeneous composite materialcontaining some cracks by dynamic loading. It is assumed that the composite material is or- thotropic and all the material properties depend only on the coordinate y (along the thickness direction) .In the analysis, the elastic region is divided into a number of plies of infinite length. The material properties are taken to constants for each p. By utilizing the Laplace transform and Fourier transform technique, the general solutions for plies are derived. singular integral equa- tions of the entire elastic region are obtained and solved by the virtual displacement principle. Attentionis focused on the time-dependent full field solutions of stress intensity factor (SIF) and strain energy release rate. As a numerical illustration, the dynamic stress intensity factor of a substrate functionallygraded film structure with two cracks under suddenly applied forces on cracks face are presented forvarious mater ial non-homogeneity parameters.