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Shear |
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shear: see strength of materials strength of materials, measurement in engineering of the capacity of metal, wood, concrete, and other materials to withstand stress and strain. Stress is the internal force exerted by one part of an elastic body upon the adjoining part, and strain is the deformation ..... Click the link for more information. . Shear A straining action wherein applied forces produce a sliding or skewing type of deformation. A shearing force acts parallel to a plane as distinguished from tensile or compressive forces, which act normal to a plane. Examples of force systems producing shearing action are forces transmitted from one plate to another by a rivet that tend to shear the rivet, forces in a beam that tend to displace adjacent segments by transverse shear, and forces acting on the cross section of a bar that tend to twist it by torsional shear (see illustration). Shear forces are usually accompanied by normal forces produced by tension, thrust, or bending. Shearing stress is the intensity of distributed force expressed as force per unit area. See Stress and strain How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Key statement: An actively controlled material to reversibly change a shear stress or a flexural modulus property which includes magnetorheological fluids, electrorheological fluids, magnetorheological elastomers and electrorheological elastomers. Too high a melt temperature can also cause mixing problems by lowering the melt viscosity so far that inadequate shear stress is generated to disperse the wood. When LiquiCell is used as an interface, such as in a wheelchair cushion, soft-tissue shear stress is reduced, blood flow becomes less restrictive, and nerve depression is lessened. |
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shear stress
