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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Building an ICME Infrastructure: Developing Tools that Integrate Across Length and Time Scales to Accelerate Materials Design
Presentation Title Coupled Crystal Plasticity-phase Field Method to Model Crack Initiation and Propagation in Ti64 Alloys.
Author(s) Jiahao Cheng, Somnath Ghosh
On-Site Speaker (Planned) Jiahao Cheng
Abstract Scope Crack initiation and propagation in highly heterogeneous titanium alloys at polycrystal scale are essential for aerospace applications. However, simulations of cracking in polycrystalline-microstructures require modeling complex crack topologies, e.g. crack deflection at grain boundaries, branching, and interactions with slip bands. In this work, a coupled crystal-plasticity-phase field approach is developed to overcome the difficulties. The method introduces a continuous auxiliary global field to approximate the sharp crack discontinuity. Without ad-hoc numerical additions, the crack phase field regularizes sharp crack surfaces by forming a crack surface area density functional, and augmented the Helmholtz free energy to describe the fracture process. The crack propagation rate and direction are then the natural outcomes from thermodynamics analysis and the principle of virtual power. Furthermore, a projection-based numerical method between the mechanical/phase fields enhances this approach to alleviate the high-resolution discretization demand from conventional phase field formulation.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Coupled Experimental and Computational Investigation of Creep-resistant Mg-RE-Zn Alloy
Accelerating the Process-structure-property Discovery Cycle
Application of Diffusion Multiples to the Study of Kinetics and Modulus Properties in the Ti-Mo-Nb-Ta-Zr System
Atomistic Polymer Simulations in the Cloud at nanoHUB.org
Challenges in Multiscale Modeling of Emergent Phenomena in Solid Mechanics
Conceptual and Computational Challenges in Multiscale Modeling
Coupled Crystal Plasticity-phase Field Method to Model Crack Initiation and Propagation in Ti64 Alloys.
Data Science and Informatics: Key Integrators of Multiscale Experiments and Multiscale Models in ICME
Differences between Measured and Simulated Elastic Strain States Using High Energy X-ray Diffraction in Titanium Using Crystal Plasticity Models
Enabling Connection of Online Simulation Tools and Databases: nanoHUB.org
Gaps in Multiscale Modeling to Address Mechanical Properties of Metal Alloys
Integrated Computational Materials Engineering (ICME) in Support of Business Decision Making and Open Innovation Through Interdisciplinary Collaboration.
Integrating Materials Microstructure Information into Engineering Design and Manufacturing
Integration of ICME Tools for the Design of Co-base Single Crystals
Making Materials Science Resources Discoverable and Accessible with the NIST Materials Resource Registry
Modeling Plastic Anisotropy of Textured Polycrystalline Materials
Modeling the Microstructural Evolution and Yield Strength in an Advanced Die Casting Aluminum Alloy
Need for Uncertainty Quantification in Multiscale Materials Modeling Need for Uncertainty Quantification in Multiscale Materials Modeling
Prediction of Hole Expansion Ratio Using Microstructure Based Dual-scale Finite Element Approach
Quantitative Approaches to Identification and Characterization of Microtexture Regions in Titanium Alloys
TAMMAL : High throughput Materials Design Suite
TESSRA: A Cloud-based Multiscale Platform for Modern Alloys Design
The Materials Commons: A Collaboration Platform and Information Repository for the Global Materials Community
The PRISMS Framework: An Integrated Multi-scale Capability for Accelerated Predictive Materials Science
Uncertainty Quantification and Propagation through CALPHAD Thermodynamics and Integrated Computational Materials Engineering (ICME)
Yield Stress, Proportional Limit: Do They Exist?

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