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shear stress
shear stressn. Stress resulting from the application of opposing forces parallel to a cross-sectional area of a body. Also called shearing stress.shear stress n (General Engineering) the form of stress in a body, part, etc, that tends to produce cutting rather than stretching or bending Translationsshear stress
shear stress[′shir ‚stres] (mechanics) shearing stress shear stress, shearing stressThe force per unit area of cross section which tends to produce shear.shear stress
shear stressthe force acting in shear flow expressed per unit area; units in the CGS system: dynes/cm2.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.stressS20-904560 (stres) [Fr. estresse, narrowness] 1. Any physical, physiological, or psychological force that disturbs equilibrium2. 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 stressOne'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 stressThe 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 dismutaseprenatal stressAnxiety, tension, depression, or other psychological discomfort experienced by a pregnant woman.shear stressShear.ThesaurusSeeshear |