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.