E Estrada
Ernesto A. Estrada, Ph.D.
Associate
Mechanical Engineering
Atlanta

Dr. Estrada has expertise in failure analysis of metals, with a focus on creep, fatigue, and creep-fatigue interactions. He specializes in modeling the material behavior of metals using solid mechanics, continuum theory of plasticity, and user material subroutines (UMATs) employed in Finite Element Analysis (FEA). Dr. Estrada has applied these material modeling techniques to predict the constitutive response and life of superalloys employed in gas turbine applications. Additionally, he has expertise in design of experiments, instrumentation, mechanical testing and characterization, and data analysis using linear and non-linear regression analysis. Dr. Estrada is also an aerospace engineer with experience on aircraft stability, performance, and design.

Prior to joining Exponent, Dr. Estrada was a Research Assistant at Georgia Institute of Technology in the aerospace engineering department, and in the mechanical engineering department. In the aerospace engineering department he used a combination of aircraft performance analysis, cost analysis, surrogate modeling, and numerical analysis to establish design requirements for electric aircraft, and to assess the impact of disruptive technologies in aviation. He also applied homogenization techniques to develop meta-models for rapid exploration of the design space of elastic properties in carbon fiber composites. While at the mechanical engineering department, he researched the constitutive behavior of nickel-base superalloys with an emphasis in thermomechanical fatigue and in creep-fatigue interactions. Dr. Estrada used mechanical testing, optical microscopy (OM), and scanning electron microscopy (SEM) to characterize the material behavior of superalloy CMSX-8. He used experimental observations and theory to develop and implement microstructure-sensitive crystal viscoplasticity models in commercial finite element software. Dr. Estrada used these models to predict the inelastic deformation of superalloys at extreme temperatures ranges.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Mechanical Engineering, Georgia Institute of Technology (Georgia Tech), 2017
  • M.S., Aerospace Engineering, Georgia Institute of Technology (Georgia Tech), 2011
  • B.S., Aerospace Engineering, United States Naval Academy, 2010
  • Management of Technology Certificate, Georgia Institute of Technology, 2017

    Tower Academic Excellence Award, Georgia Institute of Technology, 2017

LANGUAGES

  • Spanish

Publications

Estrada Rodas EA, Neu, RW. Crystal viscoplasticity model for the creep-fatigue interactions in single-crystal Ni-base superalloy CMSX-8, International Journal of Plasticity 2017.

Gorgannejad S, Estrada Rodas E, Neu RW. Role of microstructure evolution on the creep-fatigue interaction in ni-base superalloys. 14th International Conference on Fracture, Athens, Greece, 2017.

Estrada Rodas E, New RW. Physics-based computational tools to model the deformation of superalloys. Georgia Institute of Technology Career, Research, and Innovation Development Conference, Atlanta, GA, 2016.

Gorgannejad S, Rodas E, Neu RW. Ageing kinetics of Ni-base superalloys. Materials at High Temperatures 2016; 33(4-5).

Estrada Rodas E, Gorgannejad S, New RW, Dyer Z, Draa PM, Shinde SR. On the development of ICME tools for creep and aging of CMSX-8. Superalloys 2016, TMS.

Estrada Rodas E, Lewe J-H, Mavris D. Feasibility focused design of electric on-demand aircraft concepts. 14th AIAA Aviation Technology, Integration and Operations Conference, AIAA, Atlanta, GA, Aviation 2014,

Estrada Rodas E, Liu Z, Mavris D. Integrated computational materials engineering of fiber-reinforced composites via metamodels. Georgia Tech Research and Innovation Conference, Atlanta, GA, 2014.

Presentations

Estrada Rodas E, Neu R. Crystal viscoplasticity creep-fatigue interaction model for CMSX-8. University Turbine Systems Research Workshop, Co-organized by U.S. Department of Energy, Office of Fossil Energy, National Energy Technology Laboratory and Georgia Institute of Technology, Atlanta, GA, 2015,

Additional Information

Peer Reviewer

Fatigue & Fracture of Engineering Materials & Structures

ASTM International Journal of Testing and Evaluation

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Mechanical Engineering, Georgia Institute of Technology (Georgia Tech), 2017
  • M.S., Aerospace Engineering, Georgia Institute of Technology (Georgia Tech), 2011
  • B.S., Aerospace Engineering, United States Naval Academy, 2010
  • Management of Technology Certificate, Georgia Institute of Technology, 2017

    Tower Academic Excellence Award, Georgia Institute of Technology, 2017

LANGUAGES

  • Spanish