Defects, such as chemical impurities and structural defects, are an inherent feature of 2D materials and can significantly alter their properties and performance. For example, defects can introduce new electronic states and modulate the band gap of 2D materials, leading to changes in their conductivity and absorption . Understanding the influence of defects on the properties of 2D materials is crucial for optimizing their performance in a variety of applications. Specifically, the mechanical properties effected by these defects are paramount to understand, as even passive devices such as solar panels face UV ray degradation, which can take place over many years. Considering space applications, photovoltaic devices are used extensively in long range space missions, satellites, and future extraterrestrial bases, and our dependence on them cannot be understated [4] . Due to this dependence on photovoltaic devices as one of the major passive clean energy recovery systems, understanding their durability over time is a large research concern, especially at the interface between materials, such as EVA encapsulate and the photovoltaic cell, where delimitation and other serious failures can occur [5] . Pre-deflected cracks are defects that are pre-existing in a material before it is subjected to external loads. These defects can significantly influence the material's response to applied loads, and can lead to premature failure. Previous studies have shown that pre-deflected cracks can significantly alter the mechanical behavior of 2D mate-rials, such as graphene and hBN, leading to changes in their strength and fracture toughness. However, there is still much to be learned about the fundamental mechanisms behind the influence of pre-deflected cracks on the mechanical behavior of 2D materials, and about how to optimize the performance of these materials in the presence of these defects. In this study, we will be analyzing the results of our simulations to understand the impact of defects, interface regions, and other factors on the properties of 2D materials. Specifically, we will be examining the stress fields, fracture energy, critical toughness, and the occurrence of deflection vs. penetration as a function of various parameters, including the number and type of defects, the angle of the interface, and the toughness of the material. This fracture energy is typically divided into two components: the surface energy, which represents the energy required to create new surface area as the crack propagates, and the elastic energy, which represents the energy stored in the material as a result of the applied load. The surface energy is typically the dominant contributor to the total fracture energy, especially in brittle materials where the elastic energy is relatively low. In ductile materials, on the other hand, the elastic energy may make a significant contribution to the total fracture energy.