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The isotropic part of the strain tensor describing the deformation of an elastic solid, equal to the fractional increase in volume.



Related Terms

ELECTROSTRICTION

A form of elastic deformation of a dielectric induced by an electric field, associated with those components of strain metal diaphragm and a rigid metal plate. known as capacitor loudspeaker.

MUSKHELISHVILI'S METHOD

A method of solving problems concerning the elastic deformation of a planar body that involves using methods from the theory of functions of a complex variable to calculate analytic functions which determine the plane strain of the body.

FLEXURE THEORY

Theory of the deformation of a prismatic beam having a length at least 10 times its depth and consisting of a material obeying Hooke's law, in response to stresses within the elastic limit.

ELASTIC BODY

A solid body for which the additional deformation produced by an increment of stress completely disappears when the increment is removed. Also known as elastic solid.

ELECTRICAL WEIGHING SYSTEM

An instrument which weighs an object by measuring the change in resistance caused by the elastic deformation of a mechanical element loaded with the object.

COMPATIBILITY CONDITIONS

A set of six differential relations between the strain components of an elastic solid which must be satisfied in order for these components to correspond to a continuous and single-valued displacement of the solid.

STRESS-STRAIN CURVE

A curve showing the relationship between the stress or load on a structure, structural member, or a specimen and the strain or deformation that results.

COMPLIANCE CONSTANT

Any one of the coefficients of the relations in the generalized Hooke's law used to express strain components as linear functions of the stress components. Also known as elastic constant.

ELASTIC

Capable of sustaining deformation without permanent loss of size or shape.

ELASTIC HYSTERESIS

Phenomenon exhibited by some solids in which the deformation of the solid depends not only on the stress applied to the solid but also on the previous history of this stress; analogous to magnetic hysteresis, with magnetic field strength and magnetic induction replaced by stress and strain respectively.

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