Cauchy–Born rule: Difference between revisions
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Revision as of 00:53, 9 February 2015
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- Not to be confused with the Born Rule in Quantum Mechanics.
The Cauchy–Born rule or Cauchy-Born approximation is a basic hypothesis used in the mathematical formulation of solid mechanics which relates the movement of atoms in a crystal to the overall deformation of the bulk solid. It states that in a crystalline solid subject to a small strain, the positions of the atoms within the crystal lattice follow the overall strain of the medium. The currently accepted form is Max Born's refinement of Cauchy's original hypothesis which was used to derive the equations satisfied by the Cauchy stress tensor. The approximation generally holds for face-centered and body-centered cubic crystal systems. For complex lattices such as diamond, however, the rule has to be modified to allow for internal degrees of freedom between the sublattices.
References
- Ericksen, J. L. (May 2008), "On the Cauchy–Born Rule", Mathematics & Mechanics of Solids, 13: 199–220.
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