Abstract
•Mixed mode dynamic SIFs for several cracks in an orthotropic FGM medium under time-harmonic excitation are examined.•Materials properties of the medium are assumed to vary exponentially along the y-axis.•Complex Fourier transform is used to solve the edge dislocations.•The problem is formulated in terms of singular integral equations by means of distributed dislocation technique (DDT).
This study aimed to investigate the fracture behavior of a cracked orthotropic FGM medium when exposed to an in-plane harmonic load. The mechanical feature of the medium exponentially varied along the y-axis. Using the Fourier transform method, stress was analyzed by assessing Volterra edge dislocation in orthotropic FGM media. The obtained solution was then applied to derive Cauchy singular integral equations to analyze multiple cracks. The mentioned equations were numerically solved to determine dislocation density functions on the crack face which were then used to evaluate dynamic mixed stress intensity factors. The influence of crack interaction, non-homogeneity, and load frequency on the dynamic stress intensity was numerically illustrated through examples.