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[Licence| Download | New Version Template] ackk_v1_0.gz(7 Kbytes)
Manuscript Title: Nonlinear computation of anisotropic elastic fields about straight edge dislocations.
Authors: P. Petrasch
Program title: NONLIN
Catalogue identifier: ACKK_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 11(1976)279
Programming language: Fortran.
Computer: UNIVAC 1108.
Operating system: EXEC 8, 31.244.
RAM: 13K words
Word size: 36
Keywords: Solid state physics, Displacement, Dislocation edge, Elastic field, Nonlinear theory, Volume dilatation.
Classification: 7.1.

Nature of problem:
This program enables the user to compute the elastic boundary conditions of straight edge dislocations using a procedure derived by Seeger, Teodosiu, and Petrasch on the basis of nonlinear anisotropic elastic theory. The result may be used to compute exactly the ionic (atomic) configuration within the dislocation core by using semi- discrete techniques.

Solution method:
The final formula for the nonlinear anisotropic elastic field is obtained starting from Airy's stress function. Differentiating twice gives the stresses wherefrom the strain components may be determined with the help of the 'generalized' Hooke's law. Integrating the strains finally gives the displacements. Complex variables and constants are used to simplify difficulties arising from the mathematical complexity of the problem.

Running time:
Running time for the test program is only a few seconds (about 20 s).