Lawrence Livermore National Laboratory



Nicolas Bertin

Postdoctoral Researcher
Materials Science Division


 +1 925-422-5308


DegreeDiscipline/InstitutionYear
Ph.D. Mechanical Engineering
– Georgia Institute of Technology
2015

Background

Nicolas Bertin joined LLNL as a Postdoctoral Research Staff Member in the Computational Materials Science Group in June 2018. His research focuses on understanding plasticity and strength of crystalline materials in terms of the physics of microscopic defects, with a particular interest in developing novel, computationally efficient models and coarse-graining procedures towards achieving scale transition between lattice defects simulations and continuum plasticity models. He received his Ph.D. in mechanical engineering from the Georgia Institute of Technology in 2015. Prior to joining LLNL, he was a postdoctoral scholar in the Mechanics and Computation Group at Stanford University.

Selected Publications

  1. N. Bertin, W. Cai, “Energy of periodic discrete dislocation networks,” Journal of the Mechanics and Physics of Solids 121, 133 (2018).
  2. R.B. Sills, N. Bertin, A. Aghaei, W. Cai, “Dislocation Networks and the Microstructural Origin of Strain Hardening,” Physical Review Letters 121, 085501 (2018).
  3. N. Bertin, W. Cai, “Computation of virtual X-ray diffraction patterns from discrete dislocation structures,” Computational Materials Science 146, 268 (2018).
  4. N. Bertin, L. Capolungo, “A FFT-based formulation for discrete dislocation dynamics in heterogeneous media,” Journal of Computational Physics 355, 366 (2018).
  5. N. Bertin, M.V. Upadhyay, C. Pradalier, L. Capolungo, “A FFT-based formulation for efficient mechanical fields computation in isotropic and anisotropic periodic discrete dislocation dynamics,” Modelling and Simulation in Materials Science and Engineering 23, 065009 (2015).
  6. C. Sobie, N. Bertin, L. Capolungo, “Analysis of Obstacle Hardening Models using Dislocation Dynamics: Application to Irradiation Induced Defects,” Metallurgical and Materials Transactions A 46, 3761 (2015).
  7. N. Bertin, C.N. Tomé, I.J. Beyerlein, M.R. Barnett, L. Capolungo, “On the strength of dislocation interactions and their effect on latent hardening in pure Magnesium,” International Journal of Plasticity 62, 72 (2014).
  8. N. Bertin, L. Capolungo, I.J. Beyerlein, “Hybrid dislocation dynamics based strain hardening constitutive model,” International Journal of Plasticity 49, 119 (2013).

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