Seminar: Automation in Multiscale Modeling - With a Focus On Soft Polymers

Mason Building, Room 3132
Friday, July 14, 2017 - 10:00


Dr. Ajay B. Harish
Scientific Co-Worker, Institute of Continuum Mechanics
Leibniz Universität Hannover

Today’s talk will focus on advanced computational technologies and their automation towards holistic modeling across multiple scales. FEM has grown as a predictive tool over the last few decades and is capable of addressing several complex problems not just related to engineering but several other areas too. To date these are hand- coded based on tensor formulations derived by researchers and experts. The process involves derivation of complex tensor derivatives, tangents and residuals that can be non-trivial especially in the presence of nonlinearities in the system.

Today’s talk focuses on automation applied to multiscale modeling of soft polymers and discusses application of automated code generation & symbolic computations for addressing these problems. Here, automation is done at a local elemental level and involves speedy computational and derivations of elemental tangents and residuals. The technique is applied towards solving problems involving Multiphysics and multiscale problems in polymers and include one of more of nonlinearities like geometric, material and boundary.


Ajay B. Harish is presently a Scientific Co-Worker with Prof. Dr.-Ing. habil. Dr. h.c. mult. Dr. - Ing. E. h. Peter Wriggers at the Institute of Continuum Mechanics of Leibniz Universität Hannover. He will be graduating in 2017 with a Doctor of Engineering in Mechanical Engineering & starting as a group leader next semester (Oct, 2017). His doctoral work focused on contact-induced fracture in particle-reinforced polymers and was awarded the “Best Researcher Award” by the Mechanics section of Leibniz Gesellschaft in Jan-2017; “University Award” (or Hochschulpreis) by the Leibniz University in Dec-2016. He was also one of the finalists of the 26th Robert J. Melosh Medal competition held in 2015. He also co-founded two engineering simulation companies: SYmbosim Inc. and Engineer Materials Inc. during his stint in Germany. He has also been a research visitor at Cornell University (USA), Lappeenranta University of Technology (Finland) and Indian Institute of Science (India).

His research comprises theoretical and computational solid mechanics and aims to understand the scale-bridging nonlinear relations between microstructural and macroscopic properties in a wide range of materials (including polymers and composites). He focuses primarily on strong nonlinearities induced by phenomenon like contact and fracture and their implications across scales. More information on his research is available on his website at