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Strain is a measure of relative deformation of a material body, with dimension of length ratio. Learn about different strain regimes, such as finite, infinitesimal and large-displacement strains, and strain measures, such as engineering, logarithmic, Green and Almansi strains.
Shear stress is the component of stress coplanar with a material cross section, arising from the shear force parallel to it. Learn how to calculate shear stress for different situations, such as beams, fluids, solids and impact, and see the equations and diagrams.
The Reissner theory is slightly different. Both theories include in-plane shear strains and both are extensions of Kirchhoff–Love plate theory incorporating first-order shear effects. Mindlin's theory assumes that there is a linear variation of displacement across the plate thickness but that the plate thickness does not change during ...
In mechanics and geology, pure shear is a three-dimensional homogeneous flattening of a body. [1] It is an example of irrotational strain in which body is elongated in one direction while being shortened perpendicularly .
Shear thinning is the non-Newtonian behavior of fluids whose viscosity decreases under shear strain. Pseudoplastic fluids are a type of shear-thinning fluid that show reduction in apparent viscosity with increasing shear rate. See the power law model, the Herschel-Bulkley model, and everyday examples of pseudoplastic fluids.
Strain rate is the time derivative of strain of a material, which measures how fast the distances of adjacent parcels of the material change. Learn how to calculate strain rate for simple and complex deformations, and how it affects the viscosity and failure of materials.
Shearing is a deformation of a material substance in which parallel surfaces slide past each other. Learn about shear strain, shear stress, shear center, shear band, and shear tests in continuum mechanics and soil mechanics.
Simple shear is a deformation in which parallel planes in a material remain parallel and translate relative to each other. Learn how simple shear is defined and modeled in fluid mechanics and solid mechanics, and how it relates to shear stress and strain.