6. Conclusion
In this study, theoretical solutions based on the wave function expansion method and Fourier transform were obtained for an inclusion in infinite space when subjected to a plane SH-wave. The effects of wave number, elliptical axial ratio and difference of material properties on the distribution of dynamic stress concentration around the elliptical inclusion were analyzed. The numerical findings revealed that the dynamic stress concentration was noted always to appear at both ends of the major axis and minor axis of elliptical inclusion. For the inclusion stiffer than the medium, the radial stress concentration at both ends of the elliptical major axis was more significant than the angular stress concentration at both ends of the elliptical minor axis. When the inclusion was softer than the medium, the phenomenon was opposite. The difference of material properties between inclusion and medium affected the changes of αDSCF with wave number and elliptical axial ratio, the greater the difference of the material properties between the medium and inclusion, the more significant the dynamic stress concentration was. Besides, the distribution ofαξDSCF at both ends of the elliptical major axis was similar to the shape of the inclusion.