Plastic Slip Patterns through Rate-Independent and Rate-Dependent Plasticity

Giovanni Lancioni; Tuncay Yalcinkaya

doi:10.4028/www.scientific.net/KEM.611-612.1777

Paper Titles

An Optimized Loading Path for Material Parameters Identification in Elastoplasticity
p.1734

Influence of a Tensile Pre-Strain on Bending of Aluminium Alloy
p.1742

Testing and Modeling of Roll Levelling Process
p.1753

The Effect of Product Size on the Pulling Force in Pultrusion
p.1763

Constitutive Modeling Based on Evolutionary Multi-Junctions of Dislocations
p.1771

Plastic Slip Patterns through Rate-Independent and Rate-Dependent Plasticity
p.1777

Experimental Chemo-Mechanical Characterization and Multiscale Modeling of the Alloys Al1050, Al2024 and Al5754
p.1787

On the Use of Explicit and Implicit Exponential Map Algorithms of Finite Strain Combined Hardening Plasticity in the Simulation of Draw Bending
p.1796

Numerical Investigation for Evaluation and Prevention of Casting Defects in TiAl Alloys
p.1807

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Plastic Slip Patterns through Rate-Independent and Rate-Dependent Plasticity

Abstract:

Plastic deformation induces various types of dislocation microstructures at different length scales, which eventually results in a heterogeneous deformation field in metallic materials. Development of such structures manifests themselves as macroscopic hardening/softening response and plastic anisotropy during strain path changes, which is often observed during forming processes. In this paper we present two different non-local plasticity models based on non-convex potentials to simulate the intrinsic rate-dependent and rate-independent development of plastic slip patterns, which is the simplified mechanism for the intrinsic microstructure development. For the sake of mechanistic understanding, the formulation and the simulations will be conducted in one-dimension which does not exclude its extension to multi-dimensions resulting in a crystal plasticity framework.