Nonlinear Finite Element Modeling of Crystalline Microstructural Properties With Application to Aluminum Alloys for Modern Armors
Year: 2014
Type: conference-abstract
Abstract: Often, large plastic deformation in polycrystals is influenced by the slip and itsgradients, which arise at the length scales of microstructural heterogeneities, and inparticular grain boundaries. In this work a non-local multiple-slip crystal plasticityformulation, i.e. augmented with gradients, is presented and applied topolycrystalline aluminum aggregates. Physically based dislocation-densitymechanisms representative of different slip interactions coupled to plastic curvaturehave been formulated within the gradient-crystal plasticity framework. Specializedfinite element methodologies that account for higher-order deformation are alsopresented and used to investigate how certain dislocation-density activities at grainboundaries are directly related to shear strain localization for polycrystallineaggregates which lead to damage tolerant armor alloys.
Authors: K. ElKhodary, M. Bakr
Institution: American University in Cairo
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2962019476