Shearing (physics)



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Shearing in shear stress in the material. Shear strain is distinguished from volumetric strain, the change in a material's volume in response to stress.

Often, the verb shearing refers more specifically to a mechanical process that causes a elastic one. A plastic shear strain is a continuous (non-fracturing) deformation that is irreversible, such that the material does not recover its original shape. It occurs when the material is yielding. The process of shearing a material may induce a volumetric strain along with the shear strain. In soil mechanics, the volumetric strain associated with shearing is known as Reynolds' dilation if it increases the volume, or compaction if it decreases the volume.

In some materials such as fracture along a narrow band. Then, all subsequent shearing occurs within the fracture. Plate tectonics, where the plates of the Earth's crust slide along fracture zones, is an example of this.

Shearing in soil mechanics is measured with a triaxial shear test or a direct shear test.

References

  • Terzaghi, K., 1943, Theoretical Soil Mechanics, John Wiley and Sons, New York 123

See also
 
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