Accession Number:

ADA470206

Title:

Modeling the Deformation of Engineered Nano-Layered Structures by Computer Simulations

Descriptive Note:

Final technical rept. 3 Jan 2003-31 Dec 2006

Corporate Author:

CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s):

Report Date:

2006-12-01

Pagination or Media Count:

16.0

Abstract:

We developed here fundamental models of plasticity, based on dislocation dynamics and atomistic computer simulation methods for the prediction of the strength and plastic deformation at the nano-to-micro-length scales. The models are applied to the simulation of plastic flow in ultra-strong nano-laminates. The developed methods are 1 An ab-initio based hybrid approach based on an extension of the parametric dislocation dynamics DD to bi-materials where the dislocation spreading over the interface is explicitly accounted 2 a hybrid ab initio-discrete dislocation dynamics model to study the core structure in straight and curved dislocations, with application to single layers and across material interfaces 3 Molecular dynamics MD modeling of dislocation motion and deformation in nano-layered composite materials and twins and 4 Dislocation Dynamics DD modeling of dislocation motion and deformation modes of anisotropic, nano-layered composite materials.

Subject Categories:

  • Plastics
  • Computer Programming and Software
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE