Question

In: Physics

Discuss stress and strain of materials in terms of Hooke's law. Please be detailed.

Discuss stress and strain of materials in terms of Hooke's law. Please be detailed.

Solutions

Expert Solution

the relevant state of the medium around a point must be represented by two second-order tensors, the strain tensor (in lieu of the displacement ) and the stress tensor (replacing the restoring force ).The analogous of Hooke's spring law for continuous media is then

where is a fourth-order tensor (that is, a linear map between second-order tensors) usually called the stiffness tensor or elasticity tensor. One may also write it as

Hooke's law only holds for some materials under certain loading conditions. Steel exhibits linear-elastic behavior in most engineering applications; Hooke's law is valid for it throughout its elastic range


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