Results from our previous study with a non angled interface still hold true. The 5 defect cases posed the crack a difficult opportunity to propagate and go through deflection at the higher interface toughness cases. However, a new prospective we are observing here is an increasingly linear trend as we become more specific with our results so far, meaning that increasing the angle of the interface creates a predictably easier opportunity for a crack to go throughout penetration. Within Figure , these are all at the point of penetration/failure for the respective cases, and overall the stress does not differ dramatically, however it can be observed that the stress at the lower angles is present over a larger area. Along with this, the stress seems to approach a curvature that is concave towards the right hand side of the material. This is a transition from the previous convex curvature towards the right hand side for the lower angle values. Considering Figure and 7 next, we observe an incredibly interested results considering the energy analysis here, the large angles tend to gravitate towards a lower Elastic Energy peak before failure occurs at a certain point. This is clear visually in our computational results, as the rate of propagation for the higher angle cases, starting around 30 • , is sizably increased; however, at the same time, the occurrence of deflection is much higher for these cases as the interface toughness is increased. This result is rather counter-intuitive, and as shown in the later analysis, continues forward. Where G c represent the critical toughness value for this scenario.