Ryan B. Sills, Ph.D.

Ryan is a former Ph.D. student in Mechanical Engineering and is now a staff member at Sandia National Laboratories. His research is on dislocation dynamics and work hardening in face-centered cubic metals. He is currently working to develop efficient time integration schemes for three-dimensional dislocation dynamics simulations and models for simulating solid solution and precipitation strengthening.

Education

Ph.D. in Mechanical Engineering, Stanford University, March 2016
M.S. in Mechanical Engineering, University of Michigan, June 2010
B.S. in Mechanical Engineering, Cornell University, May 2009

Career

Member of Technical Staff, Sandia National Laboratories, Sept. 2014 - Present
Doctoral Study Program, Sandia National Laboratories, Sept. 2012 - Sept. 2014
Member of Technical Staff, Sandia National Laboratories, Sept. 2010 - Sept. 2012

Publications

R. B. Sills, A. Aghaei, W. Kuykendall, and W. Cai, "Fundamentals of Dislocation Dynamics Simulations", in Multiscale Materials Modeling for Nanomechanics, Eds. C. Weinberger and G. Tucker, Springer (2016).

R. B. Sills and W. Cai, Solute Drag on Perfect and Extended Dislocations, Accepted, Philosophical Magazine (2016).

R. B. Sills, A. Aghaei, and W. Cai, Advanced Time Integration Algorithms for Dislocation Dynamics Simulations of Work Hardening, Submitted to MSMSE (2016).

R. B. Sills and M. D. Thouless, Theoretical Aspects of Cohesive-Length Scales, In Preparation (2015).

Y. Sun, R. B. Sills, X. Hu, Z. W. Seh, X. Xiao, H. Xu, W. Luo, H. Jin, Y. Xin, T. Li, Z. Zhang, J. Zhou, W. Cai, Y. Huang, and Y. Cui, A Bamboo-Inspired Nanostructure Design for Flexible, Foldable, and Twistable Energy Storage Devices, Nano Letters, 15, 3899-3906 (2015).

R. B. Sills and M. D. Thouless, Cohesive-Length Scales for Damage and Toughening Mechanisms, International Journal of Solids and Structures, In-Press (2014).

W. Cai, R. B. Sills, D. M. Barnett, and W. D. Nix, Modeling a Distribution of Point Defects as Misfitting Inclusions in Stressed Solids, Journal of the Mechanics and Physics of Solids, 66 154-171 (2014).

R. B. Sills and W. Cai, Efficient Time Integration in Dislocation Dynamics, Modeling and Simulation in Materials Science and Engineering, 22 (2014) 025003.

R. B. Sills and M. D. Thouless, The Effect of Cohesive-Law Parameters on Mixed-Mode Fracture, Engineering Fracture Mechanics, 109, 353-368, (2013).

Contact Information

Email: rbsills@sandia.gov