Rock Glacier Dynamics by a Thermo-Elastic-Viscoplastic Constitutive Relationship
As a result of mountain permafrost creep, rock glaciers are common features in high-altitude periglacial areas. From a practical point of view, beyond their localization and inventorying, both the monitoring and prediction of their evolution due to climate changes are crucial. One of the effects of...
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Online Access: | https://doi.org/10.3390/geosciences11100417 https://doaj.org/article/59c90a1c0d244eff94c0fe9822e2cd6e |
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ftdoajarticles:oai:doaj.org/article:59c90a1c0d244eff94c0fe9822e2cd6e 2023-05-15T17:57:28+02:00 Rock Glacier Dynamics by a Thermo-Elastic-Viscoplastic Constitutive Relationship Stefano Alberti Luca Flessati 2021-10-01T00:00:00Z https://doi.org/10.3390/geosciences11100417 https://doaj.org/article/59c90a1c0d244eff94c0fe9822e2cd6e EN eng MDPI AG https://www.mdpi.com/2076-3263/11/10/417 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences11100417 2076-3263 https://doaj.org/article/59c90a1c0d244eff94c0fe9822e2cd6e Geosciences, Vol 11, Iss 417, p 417 (2021) mountain permafrost rock glacier climate change Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.3390/geosciences11100417 2022-12-31T14:00:07Z As a result of mountain permafrost creep, rock glaciers are common features in high-altitude periglacial areas. From a practical point of view, beyond their localization and inventorying, both the monitoring and prediction of their evolution due to climate changes are crucial. One of the effects of climate change is the thickening of the basal shear zone (the portion of the rock glacier where most deformations are localized), eventually leading to the development of unexpected and unprecedented (in terms of location, magnitude, frequency, and timing) instability phenomena. These phenomena bear consequences for the understanding of landscape evolution, natural hazards, and the safe and sustainable operation of high-mountain infrastructures. Most of the studies about active rock glaciers are focused on the analysis of monitoring data, while just a few studies are focused on modeling their behavior to understand their possible further evolution. The active rock glacier response is characterized by a viscous (rate-dependent) behavior, influenced by seasonal temperature oscillations, and characterized by a seasonal transition from slow to fast. In this work, a new thermo-mechanical model based on the delayed plasticity theory and calibrated on experimental results is proposed. The model is employed to evaluate the influence of geometry and forcing (air temperature) on a real rock glacier (Murtèl-Corvatsch rock glacier) creep behavior. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Geosciences 11 10 417 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
mountain permafrost rock glacier climate change Geology QE1-996.5 |
spellingShingle |
mountain permafrost rock glacier climate change Geology QE1-996.5 Stefano Alberti Luca Flessati Rock Glacier Dynamics by a Thermo-Elastic-Viscoplastic Constitutive Relationship |
topic_facet |
mountain permafrost rock glacier climate change Geology QE1-996.5 |
description |
As a result of mountain permafrost creep, rock glaciers are common features in high-altitude periglacial areas. From a practical point of view, beyond their localization and inventorying, both the monitoring and prediction of their evolution due to climate changes are crucial. One of the effects of climate change is the thickening of the basal shear zone (the portion of the rock glacier where most deformations are localized), eventually leading to the development of unexpected and unprecedented (in terms of location, magnitude, frequency, and timing) instability phenomena. These phenomena bear consequences for the understanding of landscape evolution, natural hazards, and the safe and sustainable operation of high-mountain infrastructures. Most of the studies about active rock glaciers are focused on the analysis of monitoring data, while just a few studies are focused on modeling their behavior to understand their possible further evolution. The active rock glacier response is characterized by a viscous (rate-dependent) behavior, influenced by seasonal temperature oscillations, and characterized by a seasonal transition from slow to fast. In this work, a new thermo-mechanical model based on the delayed plasticity theory and calibrated on experimental results is proposed. The model is employed to evaluate the influence of geometry and forcing (air temperature) on a real rock glacier (Murtèl-Corvatsch rock glacier) creep behavior. |
format |
Article in Journal/Newspaper |
author |
Stefano Alberti Luca Flessati |
author_facet |
Stefano Alberti Luca Flessati |
author_sort |
Stefano Alberti |
title |
Rock Glacier Dynamics by a Thermo-Elastic-Viscoplastic Constitutive Relationship |
title_short |
Rock Glacier Dynamics by a Thermo-Elastic-Viscoplastic Constitutive Relationship |
title_full |
Rock Glacier Dynamics by a Thermo-Elastic-Viscoplastic Constitutive Relationship |
title_fullStr |
Rock Glacier Dynamics by a Thermo-Elastic-Viscoplastic Constitutive Relationship |
title_full_unstemmed |
Rock Glacier Dynamics by a Thermo-Elastic-Viscoplastic Constitutive Relationship |
title_sort |
rock glacier dynamics by a thermo-elastic-viscoplastic constitutive relationship |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/geosciences11100417 https://doaj.org/article/59c90a1c0d244eff94c0fe9822e2cd6e |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Geosciences, Vol 11, Iss 417, p 417 (2021) |
op_relation |
https://www.mdpi.com/2076-3263/11/10/417 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences11100417 2076-3263 https://doaj.org/article/59c90a1c0d244eff94c0fe9822e2cd6e |
op_doi |
https://doi.org/10.3390/geosciences11100417 |
container_title |
Geosciences |
container_volume |
11 |
container_issue |
10 |
container_start_page |
417 |
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1766165899826429952 |