shear stress

(redirected from Tangential stress)
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Related to Tangential stress: Radial stress

shear stress

the force acting in shear flow expressed per unit area; units in the CGS system: dynes/cm2.
Farlex Partner Medical Dictionary © Farlex 2012

shear stress

Biophysics
A frictional force tangential to the direction of a flowing fluid, the force of which is directly related to the fluid’s viscosity shear stress. In blood vessels, shear stress acts on endothelium and is the mechanical force responsible for the acute changes in luminal diameter. 

Geomedicine
Stress parallel to a given surface (e.g., a fault plane) that results from forces applied parallel to the surface or from remote forces transmitted through surrounding rock.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

stress

(stres) [Fr. estresse, narrowness]
1. Any physical, physiological, or psychological force that disturbs equilibrium
2. The consequences of forces that disturb equilibrium.
3. Force applied per unit area. In the physical sciences, stresses include forces that deform or damage materials, such as impact, shear, torsion, compression, and tension. These physical stresses are particularly important in certain branches of health care, e.g., dentistry or orthopedic surgery, and in biotechnology industries, e.g., in the design and use of prostheses, grafts, and perfusion pumps.

Physiological stresses include agents that upset homeostasis, such as infection, injury, disease, internal organ pressures, or psychic strain.

In psychology, stresses include perceptions, emotions, anxieties, and interpersonal, social, or economic events that are considered threatening to one's physical health, personal safety, or well-being. Marital discord; conflicts with others; battle, torture, or abuse; bankruptcy; incarceration; health care crises; and self-doubt are all examples of conditions that increase psychic stresses. The response of an organism or material to stress is known as adaptation. See: adaptation; anxiety; fracture; homeostasis; Laplace, law of; relaxation response

critical incident stress

One's emotional reaction to a catastrophic event such as a mass casualty incident or the death of a patient or coworker. Often such events negatively affect the well-being of health care providers.

oxidative stress

The cellular damage caused by oxygen-derived free radical formation. The three most important are superoxide (O2-), hydrogen peroxide (H2O2), and hydroxyl ions; these are produced during normal metabolic processes as well as in reaction to cell injury. The extent of their damaging potential can be decreased by antioxidants.
See: antioxidant; free radical; superoxide; superoxide dismutase

prenatal stress

Anxiety, tension, depression, or other psychological discomfort experienced by a pregnant woman.

shear stress

Shear.
Medical Dictionary, © 2009 Farlex and Partners
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References in periodicals archive ?
For single-cycle pipe freezing, Figures 6(a) and 6(b) show the tangential stress [[sigma].sup.*.sub.[theta]] and radial displacement [u.sup.*] , respectively, along the inner edge of the inhomogeneous frozen wall as a function of the nonuniform coefficient of ground press [lambda] and of the excavation unloading ratio [eta].
Elastic Analysis of Nonhomogeneous Frozen Wall under Nonaxisymmetric Ground Stress Field and in State of Unloading
As can be seen in Figures 6 and 7, radial and tangential stresses decrease linearly along the radial direction.
Numerical and Analytical Calculations for Modeling and Designing Drilling Wicks or Rotary Cutters Based of Functionally Graded Materials
The difference in the shear stress of the interlayer at the interfaces and the tangential stress jump is smaller when the residual surface tension amplitude is smaller.
On the Stress Transfer of Nanoscale Interlayer with Surface Effects
Caption: FIGURE 7: Tangential stress field per unit twist [[tau].sup.2]/[alpha]; a = 2, b = 1; [k.sub.1] = [k.sub.3] = 1, [k.sub.2] = 2.
On Torsion of Functionally Graded Elastic Beams
As the inverse simulations were performed based on the forward solution of tangential stress field, the reconstructed temperature fields do not match with the direct temperature field.
Inverse Prediction and Application of Homotopy Perturbation Method for Efficient Design of an Annular Fin with Variable Thermal Conductivity and Heat Generation
We can assume that the tangential stress and normal stresses from deformation along the other axes are missing: [[sigma].sub.y] = [[sigma].sub.z] = [[tau].sub.xy] = [[tau].sub.xz] = [[tau].sub.yz] = 0.
Influence of manufacturing quality of laminated core on a turbogenerator exploitation term
When the tangential stress [[sigma].sub.3] in the tensile state is selected as the judgment standard of the pressure arch, the lateral pressure coefficient is [xi] = 0.2, and the pressure arch line is shown in Figure 10.
Prediction of Collapse Scope of Deep-Buried Tunnels Using Pressure Arch Theory
The motion of a fluid can be obtained as a result of several effects such as various types of motion of the boundaries, application of a body force, wall that applies a tangential stress on the fluid or application of a pressure gradient.
SOME COUETTE FLOWS OF A SECOND GRADE FLUID DUE TO TANGENTIAL STRESSES
The same recalculation of tangential stress is done during test procedure.
Direct shear tests with evaluation of variable shearing area/Tiesioginio kirpimo bandymai ivertinant kintama kerpamaji plota
Hydra-Cell diaphragm pumps from WANNER INTERNATIONAL are claimed to impose only low levels of tangential stress on the pumped fluid making them ideal for pumping a wide range of shear sensitive materials.
Pumping shear sensitive liquids
The stresses can be high, especially the tangential stress if the contact is not lubricated.
The influence of wheel/rail contact conditions on the microstructure and hardness of railway wheels
Figures 5 and 6 show the variations of the radial stress [[sigma].sub.rr] and tangential stress [[sigma].sub.[phi][phi]] with respect to the radius r, respectively.
An analytical solution for effect of magnetic field and initial stress on an infinite generalized thermoelastic rotating nonhomogeneous diffusion medium

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