Abstract: This work describes an alternative formulation of a system of nonlinear state-dependent delay differential equations (SDDDEs), which governs the coupled axial-torsional vibrations of a 2 DOF drillstring model with a realistic ...

Abstract: AbstractNatural hydraulic fractures (NHFs) are tensile fractures that form in fluid-saturated rocks when in-situ pore pressure exceeds the minimum compressive stress. Their propagation is controlled by the inflow of pore ...

Abstract: This paper investigates the tip region of a hydraulic fracture propagating near a free-surface via the related problem of the steady fluid-driven peeling of a thin elastic layer from a rigid substrate. The solution of this ...

Abstract: Abstract. This study investigates the boundary layer solution in the tip region of shallow hydraulic fractures that propagate with a finite fluid lag. Owing to their proximity to the free surface, shallow hydraulic fractures ...

Abstract: The accurate evaluation of the instantaneous undeformed chip thickness (IUCT) plays a crucial role in the modeling of milling processes. However, the vibrations of the tool–workpiece system can make conventional IUCT models ...

Abstract: Abstract. This article presents an analysis of the stress induced by a volumetric eigenstrain field in an elastic cylinder that is free to deform. This field is characterized by a transverse discontinuity at the midsection ...