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About this Abstract
Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Algorithms Development in Materials Science and Engineering
Presentation Title Resolving Plasticity Near Cracks Through 3D Discrete Dislocation Dynamics Simulations
Author(s) Xiangchen Zhu, Jaafar El-Awady
On-Site Speaker (Planned) Xiangchen Zhu
Abstract Scope Quantifying plasticity near crack tips is essential for understanding the early stages of fracture in ductile metals. In this work, we develop a 3D discrete dislocation dynamics (DDD) workflow to investigate dislocation activity and strain localization in the vicinity of static crack geometries. The elastic stress fields surrounding the crack are captured from high-resolution finite element (FEM) simulations and directly incorporated into the DDD model. By systematically varying crack orientation, loading conditions, and crystal orientations, we examine how these factors influence the evolution of dislocation structures, strain distribution, and local hardening behavior. Our results reveal complex dislocation interactions and intense plastic strain accumulation near crack tips, offering quantitative insights into crack-tip shielding mechanisms and the micromechanics of fracture. This framework provides a robust foundation for multiscale modeling of ductile fracture informed by dislocation-level physics.
Proceedings Inclusion? Planned:
Keywords Computational Materials Science & Engineering, Modeling and Simulation,

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