Fracture of bicrystal metal/ceramic interfaces: A study via the mechanism-based strain gradient crystal plasticity theory

Siddiq, M.; Schmauder, Siegfried; Huang, Y.

doi:10.1016/j.ijplas.2006.08.007

Cited by 49 publications

(28 citation statements)

References 87 publications

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“…(4b)), whereas in the mechanism-based strain-gradient crystal-plasticity (MBSGCP) theory [11,34], the CRSS is determined by SSDs only. The evolution of slip resistance during loading, on the other hand, is the resultant of incremental hardening due to both SSDs ( ) [29].…”

Section: Emsgcp Theory and Finite-element Modelling Of 4 Indentationmentioning

confidence: 99%

Indentation studies in b.c.c. crystals with enhanced model of strain-gradient crystal plasticity

Demiral

Roy

2013

Computational Materials Science

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• This is the author's version of a work that was accepted for publication in the Computational Materials Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published at:http://www.sciencedirect.com/science/article/pii/S0927025613004072

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Section: Emsgcp Theory and Finite-element Modelling Of 4 Indentationmentioning

confidence: 99%

Indentation studies in b.c.c. crystals with enhanced model of strain-gradient crystal plasticity

Demiral

Roy

2013

Computational Materials Science

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“…It corresponds to diagonal hardening. The function G deals implicitly with crosshardening that occurs between slip systems during the second stage of hardening [32].…”

Section: Constitutive Lawsmentioning

confidence: 99%

Interests and limitations of nanoindentation for bulk multiphase material identification: Application to the β phase of Ti-5553

et al. 2009

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This paper focuses on the numerical modeling of nanoindentation tests. The first goal of this study is to collect essential material parameters and boundary conditions from the literature and to complete the data required to accurately model nanoindentation tests. The second goal of this study consists in validating the material parameters identified from macroscopic tensile tests of the body-centered cubic β phase of Ti-5553, a new generation of titanium alloy. This validation is performed looking at experimental and numerical nanoindentation curves obtained for different grain orientations.

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“…Studies conducted in the framework of phenomenological (Wei and Hutchinson, 1997;Komaragiri et al, 2008;Nielsen et al, 2012) and mechanism-based theories (Wei and Xu, 2005;Siddiq et al, 2007) have shown that GNDs near the crack tip promote local strain hardening and lead to a much higher stress level as compared with classical plasticity predictions.…”

Section: Introductionmentioning

confidence: 99%

On Fracture in Finite Strain Gradient Plasticity

Martínez‐Pañeda

2017

Springer Theses

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In this work a general framework for damage and fracture assessment including the effect of strain gradients is provided. Both mechanism-based and phenomenological strain gradient plasticity (SGP) theories are implemented numerically using finite deformation theory and crack tip fields are investigated. Differences and similarities between the two approaches within continuum SGP modeling are highlighted and discussed. Local strain hardening promoted by geometrically necessary dislocations (GNDs) in the vicinity of the crack leads to much higher stresses, relative to classical plasticity predictions. These differences increase significantly when large strains are taken into account, as a consequence of the contribution of strain gradients to the work hardening of the material. The magnitude of stress elevation at the crack tip and the distance ahead of the crack where GNDs significantly alter the stress distributions are quantified. The SGP dominated zone extends over meaningful physical lengths that could embrace the critical distance of several damage mechanisms, being particularly relevant for hydrogen assisted * Corresponding author. Tel: +34 985 18 19 67; fax: +34 985 18 24 33.Email address: martinezemilio@uniovi.es (E. Martínez-Pañeda) November 6, 2017 cracking models. A major role of a certain length parameter is observed in the multiple parameter version of the phenomenological SGP theory. Since this also dominates the mechanics of indentation testing, results suggest that length parameters characteristic of mode I fracture should be inferred from nanoindentation. Preprint submitted to Elsevier

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Fracture of bicrystal metal/ceramic interfaces: A study via the mechanism-based strain gradient crystal plasticity theory

Cited by 49 publications

References 87 publications

Indentation studies in b.c.c. crystals with enhanced model of strain-gradient crystal plasticity

Indentation studies in b.c.c. crystals with enhanced model of strain-gradient crystal plasticity

Interests and limitations of nanoindentation for bulk multiphase material identification: Application to the β phase of Ti-5553

On Fracture in Finite Strain Gradient Plasticity

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