Tuesday, May 13

10:30 AM-12:10 PM

Peale C Room

Size Effects in Materials and Structures (Part I of II)

This minisymposium focuses on size effects in materials and structures. Such effects are present because physical processes that govern deformation and fracture behavior at one scale may not be important at another scale. Size effects are of critical importance in many applications that involve predictions for very large (ice fields) or very small (microelectronics components)structures that are based on experimental data obtained from conventional laboratory specimens. The speakers in this minisymposium will present recent computational, experimental, and theoretical work and will discuss ideas explored by engineers, mathematicians, and physicists.

Organizers: John P. Dempsey, Clarkson University; Robert Lipton, Worcester Polytechnic Institute; and Gregory J. Rodin, University of Texas, Austin

10:30-10:50 Geometrically-Necessary Dislocation Density and Scale-Dependent Crystal Plasticity
D. M. Parks, Massachusetts Institute of Technology
10:55-11:15 Composites and Polycrystals with Gradient Effects: Linear and Nonlinear Bounds with Size Effects
Valery P. Smyshlyaev, University of Bath, United Kingdom; and N. A. Fleck, University of Cambridge, United Kingdom
11:20-11:40 Scale Effects in Model Composites: Experimental and Numerical Studies
John Botsis, Swiss Institute of Technology, Switzerland; Arif Masud and C. Beldich, University of Illinois, Urbana-Champaign
11:45-12:05 Size Effects for Particle Reinforced Imperfectly Bonded Elastic Composites
Robert Lipton, Organizer; and Bogdan Vernescu, Worcester Polytechnic Institute

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MMD, 5/1/97