AVS 59th Annual International Symposium and Exhibition
    Oxide Heterostructures-Interface Form & Function Focus Topic Tuesday Sessions
       Session OX-TuP

Paper OX-TuP3
Molecular Dynamics Simulation Studies of The Toughening Mechanisms of Bio-inspired Hybrid Ceramic-based Materials

Tuesday, October 30, 2012, 6:00 pm, Room Central Hall

Session: Oxide Interfaces and Heterostructures Poster Session
Presenter: K. Yao, University of Florida
Authors: K. Yao, University of Florida
T. Liang, University of Florida
D.E. Yilmaz, University of Florida
S.R. Phillpot, University of Florida
S.B. Sinnott, University of Florida
Correspondent: Click to Email
Bio-inspired hybrid ceramic-based materials have attracted attention due to their high yield strength and fracture toughness. In this work, the mechanisms associated with the mechanical responses of composites of poly(methyl methacrylate), or PMMA, and Al2O3 in two hierarchical configurations, lamellar and brick-and-mortar, are considered. In particular, classical molecular dynamics simulations using charge optimized many-body (COMB) potentials are carried out to identify these mechanisms. The influence of such factors as the arrangement of the phases in the two different configurations, interfacial composition, nanometer-scale structure, and polymer thickness are considered. The nanometer-scale responses of the composites nanoindentation, shearing, and bending are compared with experimental data. This work is supported by DARPA.