Within these 0 defect simulations, we aim to find the base level of comparison between solely the angle without needing to consider the defects. Considering the meshing scheme between each of the defects can cause minute fluctuations in the specific penetration point. Shown in Figure and Table , we can see that the increased angling of the interface itself, with no other changed parameters such as defect density, leads to larger interface toughness values required for penetration to occur. This effectively shows that the angling of the interface allows for the propagation of the crack through the interface region to proceed at a more frequent rate. As we know, a crack often finds its way through the line-of-symmetry through a homogenous material, in which the stress on a symmetrical object is distributed evenly, so a crack will have an easier time propagating along a symmetrical line than it would along an asymmetrical one. Later we will observe analysis of stress fields and concentration at the crack tip among the angled interface, which will provide fruitful insight into why the pre-deflected crack is choosing to penetrate less often with the angling of the interface increasing. Notably, it is shown that the 0 defects has similarities to the 5 defects in terms of positive effects on the 2D media. Where G c represent the critical toughness value for this scenario.