Vesselin Yamakov

Senior Research Scientist

National Institute of Aerospace

Resident at: MS 188E, NASA Langley Research Center,

Hampton, VA 23681
Tel: (757) 864-2850

Fax: (757) 864-8911
Email: Yamakov@nianet.org

Research Interests

·         Materials science with the emphasis on the development of new materials, including nanocrystalline materials, metallic materials and polymer-metal composites.

·         Multiscale modeling: atomistic molecular-dynamics and Monte-Carlo simimulations, coupled with continuum finite-element modeling for representing fracture processes in metallic systems.

Current Research

·         Evaluation of Damage Processes through Atomistic Modeling. The purpose of the research is to study at atomic level the conditions for fracture nucleation in metals and the mechanisms of crack growth. The goal is to develop computational models for predicting the failure of metals and metal alloys that are of interest for aero and space applications.

Publications

1.     E. Saether, V. Yamakov, E. H. Glaessgen, An Embedded Statistical Method for Coupling Molecular Dynamics and Finite Element Analyses, International Journal for Numerical Methods in Engineering, 78, 1292-1319 (2009).

2.     P. C. Millett, D. Wolf, T. Desai, and V. Yamakov, Time Scale for Point-Defect Equilibration in Nanostructures, Applied Physics Letters, 93, 161902-1-3 (2008).

3.     V. Yamakov, E. Saether, and E. H. Glaessgen, Multiscale Modeling of Intergranular Fracture in Aluminum: Constitutive Relation for Interface Debonding, Journal of Materials Science, 43, 7488-7494 (2008).

4.     J. Markmann, V. Yamakov, and J. Weissmüller, Validating Grain Size Analysis from X-Ray Line Broadening: A Virtual Experiment, Scripta Materialia, 59, 15-18 (2008).

5.     V. I. Yamakov, and E. H. Glaessgen, To Twin or not to Twin, News & Views article to Nature Materials, 6, 795-796 (2007).

6.     V. Yamakov, E. Saether, D. R. Phillips and E. H. Glaessgen, Dynamics of Nanoscale Grain-Boundary Decohesion in Aluminum by Molecular-Dynamics Simulation, Journal of Materials Science – Special Issue, 42, 1466-1476 (2007).

7.     V. Yamakov, E. Saether, D. R. Phillips and E. H. Glaessgen, Molecular-Dynamics Simulation-Based Cohesive Zone Representation of Intergranular Fracture Processes in Aluminum, J. Mech. Phys. Solids, 54, 1899-1928 (2006).

8.     V. Yamakov, E. Saether, D. R. Phillips and E. H. Glaessgen, Dynamic Instability in Intergranular Fracture, Phys. Rev. Lettrs., 95, 015502-1-4 (2005)

9.     D. Wolf, V. Yamakov, S. R. Phillpot, A. Mukherjee and H. Gleiter, Deformation of Nanocrystalline Materials by Molecular-Dynamics Simulation: Relationship to Experiments? – review article, Acta Mater., 53, 1-40 (2005). 

10.  Yamakov, V., Wolf, D., Phillpot, S. R., Mukherjee, A. K. and Gleiter, H., Deformation-mechanism map for nanocrystalline metals by molecular-dynamics simulation. Nature Materials 3, 43-47 (2004).