On the continuum damage mechanics approach to modeling of polar ice fracture: a reply

Duddu, Ravindra; Waisman, Haim

doi:10.3189/2013jog13j083

Cited by 2 publications

(1 citation statement)

References 23 publications

(53 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their results also highlighted the stabilizing effect of the compressive stress due to seawater pressure and the substantial influence of basal slip in increasing crevasse depth. In response to questions raised about the use of a strain threshold in their models [ Gagliardini et al ., ], Duddu and Waisman [] clarified the relevance of their model to tensile stress regimes and the short time scales associated with fracturing.…”

Section: Crevasse Modelsmentioning

confidence: 99%

Glacier crevasses: Observations, models, and mass balance implications

Colgan

Rajaram

Abdalati

et al. 2016

Reviews of Geophysics

177

199

View full text Add to dashboard Cite

We review the findings of approximately 60 years of in situ and remote sensing studies of glacier crevasses, as well as the three broad classes of numerical models now employed to simulate crevasse fracture. The relatively new insight that mixed-mode fracture in local stress equilibrium, rather than downstream advection alone, can introduce nontrivial curvature to crevasse geometry may merit the reinterpretation of some key historical observation studies. In the past three decades, there have been tremendous advances in the spatial resolution of satellite imagery, as well as fully automated algorithms capable of tracking crevasse displacements between repeat images. Despite considerable advances in developing fully transient three-dimensional ice flow models over the past two decades, both the zero stress and linear elastic fracture mechanics crevasse models have remained fundamentally unchanged over this time. In the past decade, however, multidimensional and transient formulations of the continuum damage mechanics approach to simulating ice fracture have emerged. The combination of employing damage mechanics to represent slow upstream deterioration of ice strength and fracture mechanics to represent rapid failure at downstream termini holds promise for implementation in large-scale ice sheet models. Finally, given the broad interest in the sea level rise implications of recent and future cryospheric change, we provide a synthesis of 10 mechanisms by which crevasses can influence glacier mass balance. Field ObservationsBy virtue of providing relatively easy access to a glacier's interior, crevasses can be an asset to observational glaciologists, permitting, for example, the efficient examination of glacier stratigraphy. Annual accumulation

show abstract

Section: Crevasse Modelsmentioning

confidence: 99%

Glacier crevasses: Observations, models, and mass balance implications

Colgan

Rajaram

Abdalati

et al. 2016

Reviews of Geophysics

177

199

View full text Add to dashboard Cite

show abstract

An updated-Lagrangian damage mechanics formulation for modeling the creeping flow and fracture of ice sheets

Jiménez

Duddu

Bassis

2017

Computer Methods in Applied Mechanics and Engineering

Self Cite

View full text Add to dashboard Cite

We describe 14 hominin teeth and tooth fragments excavated recently from Swartkrans Cave (South Africa). The fossils derive from Members 1 (Lower Bank) and 3, from the Member 2/3 interface and from two deposits not yet assigned to member (the "Talus Cone Deposit" and "Underground North Excavation" [UNE]) of the Swartkrans Formation, and include the first hominin fossil from the UNE, the two smallest Paranthropus robustus deciduous maxillary second molars in the entire hominin fossil record, and one of the smallest P. robustus permanent maxillary second molars from Swartkrans. The small permanent molar is accompanied by another tooth from a different individual but from the same stratigraphic level of the Swartkrans Formation; this second tooth is among (if not) the largest P. robustus permanent maxillary first molars known from anywhere-lending credence to assertions that degrees of body size sexual dimorphism previously ascribed to this species may be underestimated. It is more equivocal whether this evidence also supports hypotheses proposing that P. robustus assemblages from Swartkrans (as well as those from other South African cave sites) formed through the taphonomically biasing actions of large carnivores.

show abstract

On the continuum damage mechanics approach to modeling of polar ice fracture: a reply

Cited by 2 publications

References 23 publications

Glacier crevasses: Observations, models, and mass balance implications

Glacier crevasses: Observations, models, and mass balance implications

An updated-Lagrangian damage mechanics formulation for modeling the creeping flow and fracture of ice sheets

Contact Info

Product

Resources

About