Numerical results are graphically presented for the normalized stress intensity factors for orthotropic material under uniform pressure loading and uniform shear loading, respectively. The effects of the degree of material anisotropy, the orientation of the crack, and the material angle are also discussed in some details. Particularly, our numerical analysis shows that the result for the normalized stress intensity factor K_Ⅰ~* under uniform pressure loading is exactly same as that for K_Ⅱ~* under uniform shear loading as shown in Fig.2-3, when the crack is perpendicular to the slippery boundary and when one of the material principal axes is along the crack faces. In addition, the stress intensity factors in Fig.4-6 are invariant under the 90 degrees of rotation of the material principal axes.
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