Accession Number : ADA471590


Title :   Multiscale Modeling and Simulation of Material Processing


Descriptive Note : Final rept. 1 May 2003-30 Apr 2006


Corporate Author : OKLAHOMA STATE UNIV STILLWATER SCHOOL OF MECHANICAL AND AEROSPACE ENGINEERING


Personal Author(s) : Komanduri, Ranga ; Lu, Hongbing ; Raff, Lionel ; Roy, Samit


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a471590.pdf


Report Date : Jul 2006


Pagination or Media Count : 224


Abstract : This project is on the development of scaling laws for multiscale simulations from atomistic to continuum using material testing techniques, such as tension and indentation. The main objective is to address critical issues involved in modeling. Specific problems addressed in this project are: (1) Multiscale simulation from atomistic to continuum via mesoplasticity by coupling molecular dynamics with the material point method in microtensile testing and nanoindentation. (2) Material behavior at nano- and microlevels using an in situ microtensile stage on an atomic force microscope and a nanoindentation system, (3) Multiscale simulation using the generalized interpolation material point method and parallel processing; (4) Combined finite element method and nanoindentation tests to determine material properties of single crystal copper in different orientations, incorporating mesoplastic constitutive laws, (5) Development of accurate and robust potentials from ab initio calculations using Gaussian O3 software, novelty sampling, and feed-forward neural networks (NN); and (6) Monte Carlo-Steepest Descent simulations of nanometric cutting.


Descriptors :   *PARALLEL PROCESSING , *MOLECULAR DYNAMICS , SOFTWARE ENGINEERING , SIMULATION , MODELS , MONTE CARLO METHOD , NANOTECHNOLOGY , SINGLE CRYSTALS , DYNAMICS , TEST METHODS


Subject Categories : Electrical and Electronic Equipment
      Computer Programming and Software
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE