Duality (mechanical engineering)

In mechanical engineering, many terms are associated into pairs called duals. A dual of a relationship is formed by interchanging force (stress) and deformation (strain) in an expression. Here is a partial list of mechanical dualities:

* force -- deformation
* stress -- strain
* stiffness method -- flexibility method

## Contents

* 1 Examples
* 1.1 Constitutive relation
* 2 See also
* 3 References

## Examples

### Constitutive relation

* stress and strain (Hooke's law.)

σ=Eε⟺ε=1Eσ

## See also

* Duality (electrical circuits)
* Hydraulic analogy
* List of dualities
* Mechanical–electrical analogies
* Series and parallel springs

## References

* Fung, Y. C., A First Course in CONTINUUM MECHANICS, 2nd edition, Prentice-Hall, Inc. 1977

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