Beaudoin. Geometrically necessary dislocations, hard- ening, and a simple gradient theory of crystal plasticity. Scripta Mater., 48(2):167-172, 2003.Geometrically necessary dislocations, hardening, and a simple gradient theory of crystal plasticity. A. Acharya,J.L. Bassani,A. Beaudoin. Scripta ...
There has recently been a strong interest in modeling size-dependent plasticity in metals based on the concept of geometrically necessary dislocations. This article presents a brief summary of our viewpoints on geometrically necessary dislocations and their role in the development of continuum plasticity ...
The concept of statistically stored and geometrically necessary dislocations is discussed in terms of observed deformation microstructures subdivided by incidental dislocation and geometrically necessary boundaries. This discussion is illustrated by examples of microstructures formed under conditions of homogeneous ...
Geometrically linear continuum theory of dislocations revisited from a thermodynamical perspectiveDislocationsDislocated crystalContinuum theoryDissipationPhase field methodFinite difference methodContinuum dislocation theory (CDT) allows the consideration of dislocation ensembles by introducing the dislocation density ...
Scardia, C. I. Zeppieri, Gradient theory for geometrically nonlinear plasticity via the homogenization of dislocations, in: S. Conti, K. Hackl (Eds.), Analysis and Computation of Microstructure in Finite Plasticity, Springer, 2015, pp. 175-204....
Multiscale crystal plasticity modeling based on geometrically necessary crystal defects and simulation on fine-graining for polycrystalTheoretical or Mathematical, Experimental/ dislocationsfinite element analysisgrain boundariesplastic deformationplasticitypolymer structure/ multiscale crystal plasticity...
These approaches suggest that geometrically confined lateral crystal growth during the crystal propagation step is necessary to fabricate defect-free single crystals. Here, inspired by the hot-casting technique and lateral crystal growth, we developed a one-step printing method to fabricate single-...
2016 Resolving geometrically necessary dislocation density onto individual dislocation types using EBSD-based continuum dislocation microscopy. Int. J. Plasticity 76, 231-243. (doi:10.1016/j.ijplas.2015.08.005)T. Ruggles, D. Fullwood, J. Kysar, Resolving geometrically necessary dislocation density ...
Resolving geometrically necessary dislocation density onto individual dislocation types using EBSD-based continuum dislocation microscopyEBSD microscopyDislocationsCrack tip plasticityModeling of plasticity is often hampered by the difficulty in accurately characterizing dislocation density on the microscale for real...
The origin of these so-called Geometrically Necessary Dislocations (GNDs) is either due to the transformation strain, or to strain gradients that arise during deformation. The generation of deformation-GNDs is explained by Ashby's theory [1] regarding deformation of a plastic mass that contains ...