Daniel W. Spring, Ph.D.
Group Head / Senior Researcher II / Staff Engineer II
Years of Experience: 2
Education and Licenses:
- Ph.D., 2015, Civil Engineering, University of Illinois at Urbana-Champaign
- MS, 2011, Civil Engineering, University of Illinois at Urbana-Champaign
- BASc, 2009, Civil and Environmental Engineering, 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
Dr. Spring joined the Applied Research and Development Group at E2G 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.