Group Head
Senior Researcher II
Staff Engineer II

Years of Experience: 2

Education & Licenses:

  • Ph.D., Civil Engineering, 2015, The University of Illinois at Urbana-Champaign, Champaign, IL
  • M.S., Civil Engineering, 2011, The University of Illinois at Urbana-Champaign, Champaign, IL
  • B.S., Civil and Environmental Engineering, 2009, University of British Columbia

Areas of Specialization:

  • Fracture of Soft and Quasi-Brittle Materials with Nonhomogeneous Microstructures
  • Computational Mechanics and Simulation of Static and Dynamic Fracture
  • Numerical Analysis using Implicit and Explicit Finite Element Methods
  • Computational Plasticity under High Temperatures
  • Composite Materials under Large Deformation, Including Interphasial Effects
  • Constitutive Modeling of Quasi-Brittle and Particle Reinforced Composites
  • Engineering Design of Steel and Concrete Structures
  • Software Development and Scientific Programming in FORTRAN, C, C++, Python, and Matlab
  • Frontend Software Development using React/Redux, Javascript, HTML and CSS

Overview:

Dr. Spring joined the Applied Research and Development Group at E2G | The Equity Engineering Group, Inc. in 2015 and currently serves as a Senior Researcher.  As a graduate from The University of Illinois at Urbana-Champaign, his Ph.D. research focused on computational fracture mechanics with an emphasis on the use of cohesive zone models for simulating quasi-static and dynamic crack propagation.  He developed a novel method for addressing a longstanding critique of the cohesive element method—mesh dependency—through the use of adaptive topological operators on polygonal discretizations.  Additionally, he developed a new constitutive relation for crack face unloading that maintains thermodynamic consistency within the cohesive zone, which can be of particular importance when simulating fatigue crack propagation and self-healing behavior.

The second component of Dr. Spring’s research focused on composite materials.  In this field, his contributions include developing a solution for the influence of nanoscale interphases on the macroscale mechanical response of particle reinforced elastomers under large deformations.  Additionally, he developed a computational framework to study the influence of interfacial debonding on the macroscopic softening of particle reinforced polymers.