3.3.1 Cases of the same material
When the inclusion and medium had the same material properties
parameters, the incident wave did not diffract at inclusion. As shown in
Fig. 8, αξDSCF had a maximum
value at both ends of the elliptical major axis, and a minimum value of
0 at both ends of the elliptical minor axis, which was opposite to the
distribution of αηDSCF . The
distribution of αξDSCF was
symmetric about the x -axis and the y -axis. Moreover,
unlike the distribution ofαηDSCF , the maximum value ofαξDSCF was not all equal to 1,
but approached or equal to 1 at k 1=0.2. The
distribution of αξDSCF around
the elliptical inclusion changed in with the radial coordinate. As
observed in Fig. 8, when the
radial coordinate was small, the shape of elliptical inclusion was close
to crack, the distribution shape ofαξDSCF around both ends of the
elliptical major axis is similar to crack tip, and the value ofαξDSCF changed drastically.
However, when the radial coordinate was large, and the shape of
elliptical inclusion was close to circle, the distribution shape ofαξDSCF around both ends of the
elliptical major axis was similar to the circle, and the value ofαξDSCF changed gently.