Symposium A-1: Prager Medalist Symposium Honoring Professor J.N. Reddy

(Awards Symposia)

Symposium Organizers:

Prof. Samit Roy, University of Alabama

Prof. Arun Srinivasa, Texas A&M University

Symposium Technical Description

The objective of this symposium is to serve as a tribute to Professor J. N. Reddy, the 2016 Prager Medalist, whose current research interests include the broad areas of non-classical and non-local continuum mechanics, and computational mechanics. Presentations are by invitation only.

Consistent with Professor J.N. Reddy’s seminal research in computational mechanics, the symposium will consist of invited presentations that pertain to, but are not limited to, areas of finite element method, plate theory, solid mechanics, variational methods, mechanics of composites, functionally graded materials, fracture mechanics, plasticity, biomechanics, classical and non-Newtonian fluid mechanics, applied functional analysis, nonlocal behavior, and emerging topics in mechanics.

Field theories of structured continua require a proper treatment of both the geometric and kinematic issues as well as possible sources of non-conventionality in writing out the constitutive equations and solving associated boundary value and/or initial value problems. In the case of structural mechanics, there is a wide range of theories, from higher gradient to truly nonlocal; however, there is a need for experimental observations that systematically corroborate these theories and physical interpretations of parameters introduced in these theories.

Similarly,  in  the case of plasticity in polycrystalline solids, wherein the configurational/geometric aspects of the defect structures, such as dislocations, play a prominent role in arriving at the suitable kinematics that in turn should afford an adequate modelling of the evolving microstructures. While many of the models seem to require higher order differentiability of the fields, we believe that questions such as the suitability of conventional differential geometry in describing the salient aspects of non-smoothness, path-dependence and their connections, if any, with non-locality should form part of the modern research discourse in continuum physics.

In addition, non-equilibrium phenomena at the macroscopic scale, which describe material transitions to failure or bifurcation to a different equilibrium (or non-equilibrium steady-state), are crucial in rational constitutive characterization of materials and ultimately material/mechanical design. Keeping in mind the nascent nature of non-equilibrium and non-classical continuum theories, which are yet to mature and are available for applications, the broad aim of this symposium is to reflect on and thus identify short and long-term research goals – experimental and theoretical – en-route to the realization of acceptable macroscopic non-classical continuum and non-local models.

Technical Program

Monday | M1 10:00am-11:40am

A1-1:  Prager Medalist Symposium Honoring Professor J.N. Reddy
1103 Session Chair:     Samit Roy, Arun Srinivasa Track A:    Awards Symposia
10:00 am Analysis of local failure in the context of multiscale failure modeling of composites

Ramesh Talreja

10:20 am A novel fiber optimization method based on normal distribution function with continuously varying fiber path

Emilio Carlos Nelli Silva

10:40 am A novel refined 1D model for the accurate stress analysis of composite structures with arbitrary curved sections

Alberto Garcia de Miguel, Alfonso Pagani

11:00 am A nonlocal phase field approach for modeling damage in quasibrittle materials

Amirtham Rajagopal

11:20 am Exterior statistics based boundary conditions for representative volume elements of elastic composites

Somnath Ghosh, Dhirendra Kubair

Monday | M2 1:00pm-2:40pm

A1-2:  Prager Medalist Symposium Honoring Professor J.N. Reddy
1103 Session Chair:     Samit Roy, Arun Srinivasa Track A:    Awards Symposia
1:00 pm A mechanically driven form of kirigami as a route to 3D mesostructures in micro/nanomembranes

Yonggang Huang, Yihui Zhang, John Rogers

1:20 pm Achieving reconfigurable structures and metamaterials through origami engineering

Glaucio Paulino, Evgueni Filipov, Tomohiro Tachi

1:40 pm Modeling of toughness enhancement mechanisms in nanocarbon reinforced polymer composites due to length scale effect

Samit Roy

2:00 pm Mechanics of interaction of the pelvic organs and muscles in pelvic organ prolapse (POP)

Arnab Chanda, Vinu Unnikrishnan

2:20 pm Mechanical behaviors of foam filled concrete under static and dynamic indentation by a scaled aircraft wheel

YiPing Liu, Liqun Tang

 Monday | M3 3:00pm-4:40pm

A1-3:  Prager Medalist Symposium Honoring Professor J.N. Reddy
1103 Session Chair:     Samit Roy, Arun Srinivasa Track A:    Awards Symposia
3:00 pm A non-classical internal polar continuum theory for solids with finite deformation and finite strain

Karan S. Surana

3:20 pm Nonlinear mechanics of surface growth for cylindrical and spherical elastic bodies

Arash Yavari

3:40 pm Network based finite element method: A reformulation of conventional finite element method for study of damage

Parisa   Khodabakhshi, J.N. Reddy, Arun   Srinivasa

4:00 pm Spectral/hp least-squares finite element analysis for generalized Newtonian fluids

Namhee Kim

4:20 pm An internal polar continuum theory for fluent continua: A more complete continuum framework

Michael Joseph Powell