Definition Lower Yield Point

A drilling fluid with higher yield point will carry cuttings better than that with lower yield point.

Definition lower yield point. The material response is linear up until the upper yield point but the lower yield point is used in structural engineering as a conservative value. Yield strength is the stress at which a material has undergone some arbitrarily chosen amount of permanent deformation often 0 2 percent. Lower yield point point gold point yield orderly stationary point process point of contraflexture regular stationary point process lower stage curie point growing point point of law wilting point arrest point compensating point control point double point tax point defect lower bar lower face yield rate angular point contact point reaction point. Some metals such as mild steel reach an upper yield point before dropping rapidly to a lower yield point.

The yield point is a vital empirical value to consider when selecting an appropriate material for building applications particularly when significant stresses are expected. The failure occurs at the yield point of the material measured in force pounds of pressure. Pv is the slope of the line. Definition of yield point in construction.

Yield point gives an indication of the ability of the drilling mud to lift or remove the cuttings out of the annulus. A few materials start to yield or flow plastically at a fairly well defined stress upper yield point that falls rapidly to a lower steady value lower yield point as deformation continues. A parameter of the bingham plastic model yp is the yield stress extrapolated to a shear rate of zero. If a metal is only stressed to the upper yield point and beyond lüders bands can develop.

All materials have different yield points and these yield points are an important characteristic which. Plastic viscosity pv is the other parameter of the bingham plastic model a bingham plastic fluid plots as a straight line on a shear rate x axis versus shear stress y axis plot in which yp is the zero shear rate intercept. The point of failure or permanent deformation of a component due to a specific amount of force.