Mechanical and Aerospace Engineering
Seminar
Dr. Sinisa Dj. Mesarovic
Washington State University
Will present a talk titled:
Physical Foundations of Mesoscale Continua
Abstract: Assume that the physics on the microscale (interactions between atoms, molecules, defects in crystals . . . ) is understood. What is the appropriate mesoscale continuum theory for the problem? What are the assumptions involved and how do they define the limitations of the continuum model? To answer these questions, we begin with the definition of mesoscale continuum kinematics from the microscale kinematics. The geometry of micro-structure (e.g., order vs. disorder) has a decisive role in defining the continuum kinematics. We consider two kinematic formulations: mass continuum and lattice continuum. Then, upon formulating the power balance, we use the principle of virtual power to arrive at a variety of mathematical formulations. Here we consider two: a simple continuum with moving boundaries and phase field formulation for mixing of fluids and capillary flows, and, polycrystalline diffusional/dislocation creep accompanied by dislocation plasticity.
Date: September 30, 2022
Location: CAMP 176
Time: 11:00 am
ZOOM Link for virtual attendance
https://clarkson.zoom.us/j/99234191973?pwd=MkcvM1ZKYW85cWZrN0FOM3lTc3VxQT09
Bio: After completing his PhD at Harvard University in 1996, Mesarovic held temporary research positions at University of Cambridge and University of Virginia. He joined Washington State University in 2001. He received a Fulbright Scholar award in 2013-14 and is ASME fellow from 2018. He was/is a visiting professor at Ecole des Mines (Paris), U. Minnesota, U. Kragujevac (Serbia), U. Novi Sad (Serbia) and Mathematical Institute of the Serbian Academy of Sciences. His main research interest lies in connecting microscale material physics to mechanics of materials and multiscale computational modeling. His earlier contributions include: fracture and contact mechanics, mesoscale dislocation plasticity, diffusion-controlled phase transformations, granular materials. His current interest include moving boundary problems: multiphase capillary flows, diffusion and creep in solids and phase transformations.