We examine the dynamics of a crack as it progresses through a thin elastic plate, with a particular focus on the influences of the process zone at the crack tip. This zone contributes to energy dissipation, exerting a viscous force on the crack tip that significantly influences its propagation patterns. As we further analyze the escalation of the driving force–the principal control parameter in this scenario–we observe notable variations in the crack propagation velocity (Boulbitch and Korzhenevskii, 2016).