To determine the average shear stress in each shear plane, free-body diagrams of rivet and of the portion of rivet located between the two planes are drawn. Observing that the shear P in each of the planes is P = F/2, the average shearing stress is τave= F/2A.Click to see full answer. In this way, what is double shear test?Double shear test is used to determine the shear strength (ultimate shear stress) of the mild steel specimen. Double shear is load applied in one plane that would result in the fastener being cut into three pieces, while single shear would result in two fastener pieces.Additionally, what is the unit of shear rate? Simple shear The SI unit of measurement for shear rate is s−1, expressed as “reciprocal seconds” or “inverse seconds”. Also asked, what is the unit of shear strain? Measures of strain are often expressed in parts per million or microstrains. The true shear strain is defined as the change in the angle (in radians) between two material line elements initially perpendicular to each other in the undeformed or initial configuration.What is the difference between shear stress and shear strain?Shear stress is the ratio of shear force applied on a surface divided by the area of the surface. Shear stress is the ratio of shear force applied on a surface divided by the area of the surface.