TY - GEN
T1 - Modelling of micro-plasticity evolution in crystalline materials
AU - Li, Dong Feng
AU - Golden, Brian
AU - O'Dowd, Noel P.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84894647642&partnerID=8YFLogxK
U2 - 10.1115/PVP2013-97233
DO - 10.1115/PVP2013-97233
M3 - Conference contribution
AN - SCOPUS:84894647642
SN - 9780791855713
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
BT - ASME 2013 Pressure Vessels and Piping Conference, PVP 2013
T2 - ASME 2013 Pressure Vessels and Piping Conference, PVP 2013
Y2 - 14 July 2013 through 18 July 2013
ER -