38 citations · 42 across the 6 of their papers we have counts for
7 papers · 1 filter
Using Discrete Harmonic Expansions and Equilibrium Conditions to Estimate Intragrain Stress Distributions in Polycrystals from Grain-Averaged Data
Paul R. Dawson, Matthew. P. Miller
The application of harmonic expansions to estimate intra-grain stress distributions from grain-averaged stress data is presented that extends the capabilities of the open source co…
Mechanical Analyses using Discrete Harmonic Expansions of Grain-Based Field Data
Paul R. Dawson, Matthew P. Miller
A methodology for computing expansion basis functions using discrete harmonic modes is presented. The discrete harmonic modes are determined grain-by-grain for virtual polycrystals…
A methodology to evaluate continuum-scale yield surfaces based on the spatial distributions of yielding at the crystal scale
Andrew C. Poshadel, Paul R. Dawson
Using a correlation between local yielding and a multiaxial strength-to-stiffness parameter, the continuum-scale yield surface for a polyphase, polycrystalline solid is predicted.…
Sensitivity of Crystal Stress Distributions to the Definition of Virtual Two-Phase Microstructures
Andrew C. Poshadel, Michael Gharghouri, Paul R. Dawson
A systematic study of the sensitivities of simulation input on the computed stress distributions in two-phase microstructures is presented. The study supports a related investigati…
Initiation and Propagation of Plastic Yielding in Duplex Stainless Steel
Andrew C. Poshadel, Michael Gharghouri, Paul R. Dawson
The elastoplastic behavior of a two-phase stainless steel alloy is explored at the crystal scale for five levels of stress biaxiality. The crystal lattice (elastic) strains were me…
Role of anisotropic strength and stiffness in governing the initiation and propagation of yielding in polycrystalline solids
Andrew C. Poshadel, Paul R. Dawson
The ratio of directional strength-to-stiffness is important in governing the relative order in which individual crystals within a polycrystalline aggregate will yield as the aggreg…