In continuum mechanics, hydrostatic stress, also known as isotropic stress or volumetric stress, [1] is a component of stress which contains uniaxial stresses, but not shear stresses. [2] A specialized case of hydrostatic stress contains isotropic compressive stress, which changes only in volume, but not in shape. [ 1 ]

This page introduces hydrostatic and deviatoric stresses. The two are subsets of any given stress tensor, which, when added together, give the original stress tensor back. The hydrostatic stress is related to volume change, while the deviatoric stress is related to shape change.

The hydrostatic stress is the average of the principal stresses and is defined as. It can be considered as three equal components acting in all directions on the element as shown in Figure 2.6. Figure 2.6. A principal element showing how the principal stress state can be composed of hydrostatic and deviatoric components.

2023年5月9日 · The term 'Hydrostatic Stress' refers to a form of pressure that is experienced by a point within a fluid, resulting from the force of gravity. It is a fundamental concept within the realm of fluid mechanics and plays a substantial role in various engineering disciplines.

2020年11月26日 · Plastic deformation of metals is stimulated solely by the deviatoric (shape-changing) component of the stress state, often termed the von Mises stress, and is unaffected by the hydrostatic component. This is consistent with the fact that plastic deformation (of metals) occurs at constant volume.

The hydrostatic stress is a measure of the pressure exerted by a state of stress. Pressure acts so as to change the volume of a material element. The deviatoric stress is a measure of the shearing exerted by a state of stress. Shear stress tends to distort a solid, without changing its volume.

In continuum mechanics, a hydrostatic stress is an isotropic stress that is given by the weight of water above a certain point. It is often used interchangeably with "pressure" and is also known as confining stress, particularly in the field geomechanics.

Hydrostatic stress is the special case where σ 1 = σ 2 = σ 3 and is equivalent to ‘pressure‘ in a fluid. Where the pressure is due to overlying rock, not fluid, the term lithostatic stress is sometimes used.

Hydrostatic stress refers to the pressure exerted by a fluid at rest. It is uniform in all directions and increases with depth in the fluid. This type of stress is important in engineering and technology, particularly in the design and analysis of structures that are subjected to fluid pressure, such as dams, pipelines, and hydraulic systems.

hydrostatic stress The component of confining pressure derived from the weight of pore water in the column of rock above a specified level. All principal stresses are equal and changes in hydrostatic pressure produce changes only in the volume and density of the material.