Support

Support Options

Submit a Support Ticket

 

NanoPlasticity Lab

A phase field approach to plastic deformation in nano crystalline materials

Launch Tool

You must login before you can run this tool.

Version 1.5 - published on 16 Oct 2014

doi:10.4231/D3X63B611 cite this

This tool is closed source.

View All Supporting Documents

    Response Functions Sensitivity Analysis Stress-strain curves

Category

Tools

Published on

Abstract

We present a tool that uses a phase field approach to simulate plastic deformation in nano-crystalline materials. It captures the competing grain-boundary and dislocation-mediated deformation mechanisms that govern plastic deformation in these materials. The model is based on a multi phase field approach in which dislocations and grain boundary sliding are represented by means of scalar phase fields described in “The role of grain boundary energetics on the maximum strength of nanocrystalline Ni”, Koslowski, Lee and Lei, Journal of the Mechanics and Physics of Solids, 59 1427-1436, 2011. The tool enables users to quantify how uncertainties in the input parameters (materials properties such as elastic constants, Peierls energy barrier for dislocation glide and activation barrier for grain boundary sliding) affect the prediction of the yield stress. In addition, it provides a sensitivity analysis that quantifies the relative importance of each input variable. In order to achieve this, the phase field simulation code is orchestrated by the PRISM Uncertainty Quantification (PUQ) tool that enables users to select various state-of-the-art methods for uncertainty propagation.

Powered by

Physics simulation: Phase field dislocation dynamics code (Koslowski Group) Uncertainty quantification: PRISM Uncertainty Quantification Tool (PUQ). Developed by the NNSA Center for the Prediction of Reliability, Integrity and Survivability of Microsystems (PRISM). Main developer: Martin Hunt.

Sponsored by

Center for the Prediction of Reliability, Integrity and Survivability of Microsystems (PRISM) funded by the US Department of Energy’s National Nuclear Security Administration under contract Grant No. DE-FC52-08NA28617:

References

Koslowski, Lee and Lei, Journal of the Mechanics and Physics of Solids, 59 1427-1436, 2011.

Cite this work

Researchers should cite this work as follows:

  • Martin Hunt; Lei Cao; Alejandro Strachan; Marisol Koslowski (2013), "NanoPlasticity Lab," http://nanohub.org/resources/nanoplasticity. (DOI: 10.4231/D3X63B611).

    BibTex | EndNote

Tags

nanoHUB.org, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.