yield stress

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Related to Yield Point: plastic viscosity

yield stress

the critical stress that must be applied to a material before it begins to flow, as in a Bingham plastic.
References in periodicals archive ?
It should be mentioned that there are temperature dependencies in the evolution of [DELTA][tau] for the first knee-like yield point of counterclockwisely twisted specimens: (1) the value at 120[degrees]C decreased for short aging period and then increased, while that value at 140[degrees]C continuously increased with aging time and (2) at 120[degrees]C, [DELTA][tau] of the first knee-like yield point becomes the same as [DELTA][tau] of clockwisely twisted specimens, while at 140[degrees]C, there is still small differences.
As the yield point is a critical point when the lamellar slippage starts, the yield strain should be related to the intrinsic intra- and inner-molecular interactions, especially the entanglement density in the amorphous blocks between the lamellae [34].
The yield point for the oscillatory tests is defined as the 5% drop in the value of the storage modulus.
4) at the Yield point using Taylor series expansion,
The yield point is nice to know because it represents an upper performance limit for very short-term behavior.
Based on the above analysis, the yield point is defined as the point C corresponding to abrupt increase of the magnitude of emitted acoustic signal and the number of AE events (Martin et al.
Safe pipe tripping speeds are affected by mud rheological properties such as mud plastic viscosity and yield point.
The material needs for the gland are cast iron of a chromium, nickel and molybdenum alloy that provides a high tensile strength, high yield point and high hardness values.
As such, a residual strain gradient is set up in the material which can falsely lower the yield point, depending on the grade of material and degree of flattening required.
Percent elongation at yield was determined by division of the gauge displacement length at the yield point (from the force-displacement curve) by the originally specified gauge length and multiplication by 100.
epsilon]]], refers to a Maxwell viscoelasticity up to the yield point, w is the viscoelastic coefficient; the second term, Y([bar.