National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Dislocation Dynamics using Anisotropic Elasticity: Methodology and Analysis.

DE200415008102

Publication Date	2000
Personal Author	Rhee, M.; Stolken, J. S.; Bulatov, V. V.; Diaz de la Rubia, T.; Zbib, H. M.; Hirth, J. P.
Page Count	26
Abstract	A numerical methodology to incorporate anisotropic elasticity into three-dimensional dislocation dynamics codes has been developed, employing theorems derived by Lothe (1967), Brown (1967), Indenbom and Orlov (1968) and Asaro and Barnett (1976). The formalism is based on the stress field solution for a straight dislocation segment of arbitary orientation in 3-dimensional space. The general solution is given in a complicated closed integral form. To reduce the computation complexity, look-up tables are used to avoid heavy computations for the evaluation of the angular stress factor ((Sigma)(sub ij)) and its first derivative term ((Sigma)(sub ij)). The computation methodology and error analysis are discussed in comparison with known closed form solutions for isotropic elasticity.
Keywords	Dislocations Elasticity Evaluation Interaction range Monocrystals Orientation Methodology Computation
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200514

Dislocation Dynamics using Anisotropic Elasticity: Methodology and Analysis.

Dislocation Dynamics using Anisotropic Elasticity: Methodology and Analysis.
DE200415008102

Publication Date	2000
Personal Author	Rhee, M.; Stolken, J. S.; Bulatov, V. V.; Diaz de la Rubia, T.; Zbib, H. M.; Hirth, J. P.
Page Count	26
Abstract	A numerical methodology to incorporate anisotropic elasticity into three-dimensional dislocation dynamics codes has been developed, employing theorems derived by Lothe (1967), Brown (1967), Indenbom and Orlov (1968) and Asaro and Barnett (1976). The formalism is based on the stress field solution for a straight dislocation segment of arbitary orientation in 3-dimensional space. The general solution is given in a complicated closed integral form. To reduce the computation complexity, look-up tables are used to avoid heavy computations for the evaluation of the angular stress factor ((Sigma)(sub ij)) and its first derivative term ((Sigma)(sub ij)). The computation methodology and error analysis are discussed in comparison with known closed form solutions for isotropic elasticity.
Keywords	Dislocations Elasticity Evaluation Interaction range Monocrystals Orientation Methodology Computation
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200514