Modelling of micro-plasticity evolution in crystalline materials

Dong Feng Li, Brian Golden, Noel P. O'Dowd

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this work, a micromechanical finite element model is presented to investigate micro-plasticity evolution in crystalline materials, with a comprehensive consideration of microstructural interactions, including morphology-based intragranular stressstrain response and the strain gradient induced scale effect. A dislocation-mechanics based crystal plasticity formulation has been employed to account for slip based inelastic deformation. A polycrystalline model has been constructed using the Voronoi tessellation technique to represent the microstructure of a martensitic power plant steel, P91. The model has been validated through a uniaxial tensile test. The effects of strain gradient have been examined at both macroscopic and microscopic levels and the importance of accounting for strain gradient effects in the prediction of local deformation states is discussed for P91.

Original languageEnglish
Title of host publicationASME 2013 Pressure Vessels and Piping Conference, PVP 2013
DOIs
Publication statusPublished - 2013
EventASME 2013 Pressure Vessels and Piping Conference, PVP 2013 - Paris, France
Duration: 14 Jul 201318 Jul 2013

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume6 B
ISSN (Print)0277-027X

Conference

ConferenceASME 2013 Pressure Vessels and Piping Conference, PVP 2013
Country/TerritoryFrance
CityParis
Period14/07/1318/07/13

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