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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Microstructure-Sensitive Modeling Across Length Scales: An MPMD/SMD Symposium in Honor of David L. McDowell
Presentation Title Microstructure-Sensitive Fracture Mechanics in Polycrystals
Author(s) Fionn Patrick Dunne, Yilun Xu
On-Site Speaker (Planned) Fionn Patrick Dunne
Abstract Scope The mechanistic drivers of short fatigue crack growth are addressed using theory, computational crystal plasticity and experimental test and characterisation. The theory shows that the crack tip stored energy density is non-singular and finite and can be related to stress intensity, but unlike the latter, it depends on the crystal Burgers vector and intrinsic slip strength. The computational methods allow the stored energy to be calculated accurately at crack tips and show that good agreement is obtained for static cracks with the theory. The experiments allow the crack tip stored energy to be measured, demonstrating microstructural sensitivity, direct correlation with experimental crack growth variations and good quantitative agreement with both theory and computational modelling.
Proceedings Inclusion? Planned:
Keywords Modeling and Simulation, Mechanical Properties,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Combined Experimental and Simulation Workflow to Analyze the Plastic Deformation Mechanisms in Pure Ti From a Digital Twin of the Microstructure
A Microstructure-Sensitive Computational Framework to Predict the Ductile to Brittle Transition of Ferritic Steel
A Scalable Defect Phase Classification Method: Bridging Atoms to Grain Boundaries
A Two-Surface Modeling to Improve Creep-Fatigue Predictions
A Unified Microstructure-Sensitive Model Across Low and High Cycle Fatigue for Additively Manufactured IN718
Atomic-Scale and Mesoscale Modeling of Deformation Twinning in Hexagonal Metals
Atomic Structure Dependence of Mesoscale Plastic Shear Localization
Collaborations and Advances in Multiscale Metal Plasticity
Data-Driven Approaches to Dislocation Mobility
Digital Twins for Accelerated Materials Innovation
Disconnection Mechanics: Segregation, Stability, and Mobility at Interfaces
Dislocation - Grain Boundary Interactions Modeled at Atomistic and Mesoscopic Length Scales
Dislocation Mobility in Metals Undergoing High Rate Plastic Deformation
E-32: Crystal Plasticity Simulation of Carbide Effects on Multiscale Mechanical Behavior of AISI 420 Steel
E-33: Predicting the Variability in Performance of Zircaloy Clad in Nuclear Reactors Environment
Effects of Grain Neighborhood on Local Piezoelectric Response and Stress Concentration in Bulk Polycrystals
Effects of Hydrogen Assisted Vacancy Production on Diffusional Creep Investigated via a Coupled Cluster Dynamics-Crystal Plasticity Framework
Four-Dimensional Reconstruction of Plastic Strain Localization From Surface-Velocity Measurements
From Atoms to Engines - Applications of Multi-Scale Modeling to Solve Critical Materials Challenges Facing Industry Today
Full-Field and Mean-Field Strain-Gradient Crystal Plasticity Models for Predicting Geometrically Necessary Dislocations and Length-Scale Dependent Mechanical Response
Genomic Material Design: Multiscale Fatigue and Fracture
Insights Into the Evolution of Slip in Cyclically Loaded IN718 Using Crystal Plasticity Finite Element, High Energy X-Ray Diffraction Microscopy and TriBeam Tomography
Interpreting the Back Stress: A Legacy of Dave McDowell
Leveraging Large Language Models to Extract Composition, Processing, Microstructure, and Property Data of Metallic Materials From Literature
Mechanistic Origin of Size Effects in Metals
Micromechanics of Precipitation in Engineering Alloys
Microstructure-Aware Bayesian Materials Discovery
Microstructure-Sensitive Fracture Mechanics in Polycrystals
Microstructure-Sensitive Modeling of Fretting Fatigue: Legacy and Progress
Microstructure-Sensitive Modeling Using Fatigue Indicator Parameters for Advanced Heterogeneous Materials
Microstructure at the Atomic Scale
Molecular Dynamics Investigation of Dislocation Mobility in Fe-Cr Alloys
Phase Transformations Induced by Large Plastic Deformations Under High Pressure: Four-Scale Theory and Experimental Confirmations
Plastic Strength of Irradiated Fe-Cr Alloys for Structural Applications in Fusion Reactors
PRISMS-Fatigue Framework: Applications for Additive Manufacturing
Radiation-Induced Dislocation Nucleation and Transformation in Aluminum Using Molecular Dynamics
Rapid Microstructural-Scale Defect Assessment for AM Materials
Shock Wave Propagation and Spallation Modeling in Aluminum Alloys Using Porous Crystal Plasticity
State Variable Modeling--Inspired Experiment Design
Strain Localization in Fatigue of FCC and HCP Materials
Strength of Metallic Alloys-Insights at Atomic Levels
Strengthening in Superalloys Using Local Phase Transformations at Defects
Synergy of Solute and Work Hardening in Fe-Cr Alloys: Insights From Dislocation Dynamics
Thermo-Mechanics of Single and Polycrystal Metal Deformation
Thermodynamics of Temperature-Strain Domain Phase Equilibria and Diagrams
Towards Microstructure-Sensitive Modeling Validation at the Mesoscale via Synchrotron-Based Experiments
Uncertainty Quantification Across Spatiotemporal Scales: What is Lost at Scale Transitions
Understanding Dislocation Movement and Interaction With Twin Boundaries in Beta-Sn
Unified Stress-Strain Model to Accommodate Plasticity Behavior From Yield to the Structural Instability
Unifying Atomistic and Continuum Definitions of Temperature for Multiscale Simulation of Finite-Temperature Processes
Zentropy for Plasticity
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