A Calculation of the Second- and Third-Order Elastic Constants of Aluminium

✍ Scribed by S. Benckert

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: English
• Weight: 380 KB
• Volume: 43
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2220430229

✦ Synopsis

Abstract

A calculation of the second‐ and third‐order elastic constants of aluminium has been made by the method of homogeneous deformation. The electronic contributions to the elastic constants are calculated using second‐order perturbation theory, Ashcroft's model potential, and a dielectric function with corrections for exchange and correlation effects, as suggested by Singwi et al. Within this model we have also estimated the difference between the calculated static and dynamic bulk modulus. This difference results from neglecting certain higher order model potential terms in the dynamic approach.