Zobrazeno 1 - 10
of 293
pro vyhledávání: '"Viggo Tvergaard"'
Autor:
Viggo Tvergaard
Publikováno v:
Frattura ed Integrità Strutturale, Vol 1, Iss 1, Pp 25-28 (2007)
Some numerical studies of crack propagation are based on using constitutive models that accountfor damage evolution in the material. When a critical damage value has been reached in a materialpoint, it is natural to assume that this point has no more
Externí odkaz:
https://doaj.org/article/f916f249a656495a968fc544ae0f4243
Autor:
Viggo Tvergaard
Publikováno v:
Frattura ed Integrità Strutturale, Vol 1, Iss 1 (2013)
Some numerical studies of crack propagation are based on using constitutive models that account for damage evolution in the material. When a critical damage value has been reached in a material point, it is natural to assume that this point has no mo
Externí odkaz:
https://doaj.org/article/b24f4a9fb9f64283b9e5d8e974eeecc3
Autor:
Brian Nyvang Legarth, Viggo Tvergaard
Publikováno v:
Engineering Fracture Mechanics. 285:109236
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83db8573dbdac8335793491e471de33e
https://doi.org/10.1016/j.engfracmech.2023.109236
https://doi.org/10.1016/j.engfracmech.2023.109236
Publikováno v:
Holte, I, Niordson, C F, Nielsen, K L & Tvergaard, V 2019, ' Investigation of a gradient enriched Gurson-Tvergaard model for porous strain hardening materials ', European Journal of Mechanics A-Solids, vol. 75, pp. 472-484 . https://doi.org/10.1016/j.euromechsol.2019.03.001
Size effects in a strain hardening porous solid are investigated using the Gurson-Tvergaard (GT) model enriched by a constitutive length parameter, as proposed by Niordson and Tvergaard [C.F. Niordson, V. Tvergaard, A homogenised model for size effec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a23bf4b28f42d2ad29ea3b768845326
https://doi.org/10.1016/j.euromechsol.2019.03.001
https://doi.org/10.1016/j.euromechsol.2019.03.001
Publikováno v:
Niordson, C F & Tvergaard, V 2019, ' A homogenized model for size-effects in porous metals ', Journal of the Mechanics and Physics of Solids, vol. 123, pp. 222-233 . https://doi.org/10.1016/j.jmps.2018.09.004
A simple method for enriching conventional homogenized porous plasticity models with size-dependence for micron scale voids is proposed. A recent strain gradient plasticity theory with dissipative gradient effects is generalized to finite strains in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0442493a05130c0724cd48ed7f4cdb65
https://doi.org/10.1016/j.jmps.2018.09.004
https://doi.org/10.1016/j.jmps.2018.09.004
Publikováno v:
Kuroda, M, Tvergaard, V & Needleman, A 2021, ' Constraint and size effects in confined layer plasticity ', Journal of the Mechanics and Physics of Solids, vol. 149, 104328 . https://doi.org/10.1016/j.jmps.2021.104328
Plane strain finite element analyses are used to model the experiments of Mu et al. (2014, 2016) for a thin metal layer confined between elastic solids. The thin metal layer undergoes elastic–plastic deformations, here modeled by strain gradient pl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::800a449f16799bfe8d8e90d8b5c7ad0b
https://orbit.dtu.dk/en/publications/a6452a36-c65f-4d01-b074-156958299756
https://orbit.dtu.dk/en/publications/a6452a36-c65f-4d01-b074-156958299756
Publikováno v:
Engineering Fracture Mechanics. 189:164-174
Void coalescence at severe shear deformation has been studied intensively under monotonic loading conditions, and the sequence of micro-mechanisms that governs failure has been demonstrated to involve collapse, rotation, and elongation of existing vo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a9128406eacf398b4a8d6d28392a924
https://doi.org/10.1016/j.engfracmech.2017.10.035
https://doi.org/10.1016/j.engfracmech.2017.10.035
Autor:
Viggo Tvergaard
Publikováno v:
Tvergaard, V 2017, ' Nucleation from a cluster of inclusions, leading to void coalescense ', International Journal of Mechanical Sciences, vol. 133, pp. 631-638 . https://doi.org/10.1016/j.ijmecsci.2017.09.027
A cell model analysis is used to study the nucleation and subsequent growth of voids from a non-uniform distribution of inclusions in a ductile material. Nucleation is modeled as either stress controlled or strain controlled. The special clusters con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e253217b9089805cb97620bbffd0d27
https://doi.org/10.1016/j.ijmecsci.2017.09.027
https://doi.org/10.1016/j.ijmecsci.2017.09.027
Autor:
Viggo Tvergaard, Brian Nyvang Legarth
Publikováno v:
Tvergaard, V & Legarth, B N 2019, ' Effects of anisotropy and void shape on cavitation instabilities ', International Journal of Mechanical Sciences, vol. 152, pp. 81-87 . https://doi.org/10.1016/j.ijmecsci.2018.12.014
The influence of plastic anisotropy on cavitation instabilities is studied by analyzing full three dimensional cell models containing a small void. The anisotropic material is represented by an elastic-viscoplastic material with a small rate hardenin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12d61355cc4dfc8587ade3e1e6f6420c
https://orbit.dtu.dk/en/publications/d66a1e75-9305-4599-8d17-79c4e0ec9b56
https://orbit.dtu.dk/en/publications/d66a1e75-9305-4599-8d17-79c4e0ec9b56
Publikováno v:
Extreme Mechanics Letters. 42:101132
We develop a continuum mechanics model of blastocyst hatching. The blastocyst and the zona pellucida are modeled as concentric thick-walled initially spherical shells embedded in a viscous medium. Each shell is characterized by a nonlinear elastic–
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c7231345c6ebdcdcd4a9872934e99a9
https://doi.org/10.1016/j.eml.2020.101132
https://doi.org/10.1016/j.eml.2020.101132