Philosophical transactions. Series A, Mathematical, physical, and engineering sciences最新文献_第2页

A peridynamic approach to simulating fatigue crack propagation in composite materials. 模拟复合材料疲劳裂纹扩展的周动力学方法。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2023-01-09 Epub Date: 2022-11-21 DOI: 10.1098/rsta.2021.0217

Tao Ni, Mirco Zaccariotto, Ugo Galvanetto

引用次数: 4

Characterizing and predicting the relationship between translaminar fracture toughness and pull-out length distributions under distinct temperatures. 表征和预测不同温度下跨层断裂韧性与拉出长度分布的关系。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2023-01-09 Epub Date: 2022-11-21 DOI: 10.1098/rsta.2021.0220

B Yu, T J Katafiasz, S Nguyen, G Allegri, J Finlayson, E S Greenhalgh, S T Pinho, S Pimenta

{"title":"Characterizing and predicting the relationship between translaminar fracture toughness and pull-out length distributions under distinct temperatures.","authors":"B Yu, T J Katafiasz, S Nguyen, G Allegri, J Finlayson, E S Greenhalgh, S T Pinho, S Pimenta","doi":"10.1098/rsta.2021.0220","DOIUrl":"https://doi.org/10.1098/rsta.2021.0220","url":null,"abstract":"The translaminar fracture toughness reflects the damage tolerance of a fibre-reinforced composite under longitudinal tension, which often governs the final failure of structures. One of the main energy-dissipation mechanisms that contributes to the translaminar toughness of composites is the fibre pull-out process. The present study aims to quantify and model the statistical distribution of fibre pull-out lengths formed on the translaminar fracture surface of composites, for the first time in the literature; this is done under different temperatures, so that the relationship between pull-out length distributions, micromechanical properties and the translaminar fracture toughness can be established. The fracture surfaces of cross-ply compact tension specimens tested under three different temperatures have been scanned through X-ray computed tomography to quantify the extent of fibre pull-out on the fracture surfaces; the distribution of pull-out lengths showed alarger average and larger variability with an increase in temperature, which also lead to an increase in translaminar fracture toughness. A similar trend has been captured by the proposed analytical model, which predicts the pull-out length distribution based on the analysis of quasi-fractal idealizations of the fracture surface, yielding an overall accuracy of more than 85%. This article is part of the theme issue 'Ageing and durability of composite materials'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20210220"},"PeriodicalIF":5.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40485325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Global-local multi-field models for the stress analysis of laminated structures. 层合结构应力分析的全局-局部多场模型。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2023-01-09 Epub Date: 2022-11-21 DOI: 10.1098/rsta.2021.0218

Enrico Zappino, Erasmo Carrera

引用次数: 0

Theoretical framework for the emergent floe size distribution in the marginal ice zone: the case for log-normality. 边缘冰区涌现浮冰粒径分布的理论框架:对数正态性的情况。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-10-31 Epub Date: 2022-09-12 DOI: 10.1098/rsta.2021.0257

Fabien Montiel, Nicolas Mokus

{"title":"Theoretical framework for the emergent floe size distribution in the marginal ice zone: the case for log-normality.","authors":"Fabien Montiel, Nicolas Mokus","doi":"10.1098/rsta.2021.0257","DOIUrl":"https://doi.org/10.1098/rsta.2021.0257","url":null,"abstract":"Sea ice is not horizontally homogeneous on large scales. Its morphology is inherently discrete and made of individual floes. In recent years, sea ice models have incorporated this horizontal heterogeneity. The modelling framework considers an evolution equation for the probability density function of the floe size distribution (FSD) with forcing terms that represent the effects of several physical processes. Despite the modelling effort, a key question remains: What is the FSD emerging from the collection of all forcing processes? Field observations have long suggested that the FSD follows a power law, but this result has not been reproduced by models or laboratory experiments. The theoretical framework for FSD dynamics in response to physical forcings is presented. Wave-induced breakup is further examined with an emphasis on how it affects the FSD. Recent modelling results suggesting the consistent emergence of a log-normal distribution as a result of that process are further discussed. Log-normality is also found in a dataset of floe sizes, which was originally analysed under the power law hypothesis. A simple stochastic process of FSD dynamics, based on random fragmentation theory, is further shown to predict log-normality. We therefore conjecture that, in some situations, the emergent FSD follows a log-normal distribution. This article is part of the theme issue 'Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20210257"},"PeriodicalIF":5.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33458698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

A prognosticative synopsis of contemporary marginal ice zone research. 当代边缘冰带研究的预测概要。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-10-31 Epub Date: 2022-09-12 DOI: 10.1098/rsta.2022.0094

Vernon A Squire

{"title":"A prognosticative synopsis of contemporary marginal ice zone research.","authors":"Vernon A Squire","doi":"10.1098/rsta.2022.0094","DOIUrl":"https://doi.org/10.1098/rsta.2022.0094","url":null,"abstract":"Commentary narrated in this theme issue is recast to contextualize the diverse themes presented into a forward-looking conversation that synthesizes, debates opportunities for multidisciplinary advances and highlights topics that deserve enduring sharpened attention. Research oriented towards foundational elements of the marginal ice zone that relates to three unifying topic subclasses-namely (i) wave propagation through sea ice, (ii) floe size distributions and (iii) ice dynamics and break-up-and is encapsulated in mini-reviews provided by Thomson, Horvat and Dumont is revisited to distill it into a blueprint for the future guided by the cutting-edge, present-day knowledge documented herein by leading practitioners in the field. Six threads are signalled as imperative for prospective research, each with a bearing on Arctic and Antarctic sea-ice canopies in which the propensity for marginal ice zones to coexist with pack ice is greater as a result of global climate change reducing sea-ice resilience while increasing the prevalence and forcefulness of injurious storm winds and waves. This article is part of the theme issue 'Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20220094"},"PeriodicalIF":5.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33458402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A model study of convergent dynamics in the marginal ice zone. 边缘冰带收敛动力学的模型研究。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-10-31 Epub Date: 2022-09-12 DOI: 10.1098/rsta.2021.0261

Jean-Pierre Auclair, Dany Dumont, Jean-François Lemieux, Hal Ritchie

{"title":"A model study of convergent dynamics in the marginal ice zone.","authors":"Jean-Pierre Auclair, Dany Dumont, Jean-François Lemieux, Hal Ritchie","doi":"10.1098/rsta.2021.0261","DOIUrl":"https://doi.org/10.1098/rsta.2021.0261","url":null,"abstract":"With the increasing resolution of operational forecasting models, the marginal ice zone (MIZ), the area where waves and sea ice interact, can now be better represented. However, the proper mechanics of wave propagation and attenuation in ice, and especially their influence on sea ice dynamics, still remain poorly understood and constrained in models. Observations have shown exponential wave energy decrease with distance in sea ice, particularly strong at higher frequencies. Some of this energy is transferred to the ice, breaking it into smaller floes and weakening it, as well as exerting a stress on the ice similar to winds and currents. In this article, we present a one-dimensional, fully integrated wave and ice model that has been developed to test different parameterizations of wave-ice interactions. The response of the ice cover to the wind and wave radiative stresses is investigated for a variety of wind, wave and ice conditions at different scales. Results of sensitivity analyses reveal the complex interplay between wave attenuation and rheological parameters and suggest that the compressive strength of the MIZ may be better represented by a Mohr-Coulomb parameterization with a nonlinear dependence on thickness. This article is part of the theme issue 'Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20210261"},"PeriodicalIF":5.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33458405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Observation of anomalous spectral downshifting of waves in the Okhotsk Sea Marginal Ice Zone. 鄂霍次克海边缘冰带波谱异常降移的观测。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-10-31 Epub Date: 2022-09-12 DOI: 10.1098/rsta.2021.0256

Takuji Waseda, Alberto Alberello, Takehiko Nose, Takenobu Toyota, Tsubasa Kodaira, Yasushi Fujiwara

{"title":"Observation of anomalous spectral downshifting of waves in the Okhotsk Sea Marginal Ice Zone.","authors":"Takuji Waseda, Alberto Alberello, Takehiko Nose, Takenobu Toyota, Tsubasa Kodaira, Yasushi Fujiwara","doi":"10.1098/rsta.2021.0256","DOIUrl":"https://doi.org/10.1098/rsta.2021.0256","url":null,"abstract":"Waves in the Marginal Ice Zone in the Okhotsk Sea are less studied compared to the Antarctic and Arctic. In February 2020, wave observations were conducted for the first time in the Okhotsk Sea, during the observational program by Patrol Vessel Soya. A wave buoy was deployed on the ice, and in situ wave observations were made by a ship-borne stereo imaging system and Inertial Measurement Unit. Sea ice was observed visually and by aerial photographs by drone, while satellite synthetic aperture radar provided basin-wide spatial distribution. On 12 February, a swell system propagating from east northeast was detected by both the stereo imaging system and the buoy-on-ice. The wave system attenuated from 0.34 m significant wave height to 0.25 m in about 90 km, while the wave period increased from 10 s to 15-17 s. This anomalous spectral downshifting was not reproduced by numerical hindcast and by applying conventional frequency-dependent exponential attenuation to the incoming frequency spectrum. The estimated rate of spectral downshifting, defined as a ratio of momentum and energy losses, was close to that of uni-directional wave evolution accompanied by breaking dissipation: this indicates that dissipation-driven nonlinear downshifting may be at work for waves propagating in ice. This article is part of the theme issue 'Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20210256"},"PeriodicalIF":5.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33458697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Wind waves in sea ice of the western Arctic and a global coupled wave-ice model. 北极西部海冰中的风浪及全球波冰耦合模式。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-10-31 Epub Date: 2022-09-12 DOI: 10.1098/rsta.2021.0258

V T Cooper, L A Roach, J Thomson, S D Brenner, M M Smith, M H Meylan, C M Bitz

{"title":"Wind waves in sea ice of the western Arctic and a global coupled wave-ice model.","authors":"V T Cooper, L A Roach, J Thomson, S D Brenner, M M Smith, M H Meylan, C M Bitz","doi":"10.1098/rsta.2021.0258","DOIUrl":"https://doi.org/10.1098/rsta.2021.0258","url":null,"abstract":"The retreat of Arctic sea ice is enabling increased ocean wave activity at the sea ice edge, yet the interactions between surface waves and sea ice are not fully understood. Here, we examine in situ observations of wave spectra spanning 2012-2021 in the western Arctic marginal ice zone (MIZ). Swells exceeding 30 cm are rarely observed beyond 100 km inside the MIZ. However, local wind waves are observed in patches of open water amid partial ice cover during the summer. These local waves remain fetch-limited between ice floes with heights less than 1 m. To investigate these waves at climate scales, we conduct experiments varying wave attenuation and generation in ice with a global model including coupled interactions between waves and sea ice. A weak high-frequency attenuation rate is required to simulate the local waves in observations. The choices of attenuation scheme and wind input in ice have a remarkable impact on the extent of wave activity across ice-covered oceans, particularly in the Antarctic. As well as demonstrating the need for stronger constraints on wave attenuation, our results suggest that further attention should be directed towards locally generated wind waves and their role in sea ice evolution. This article is part of the theme issue 'Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20210258"},"PeriodicalIF":5.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33458403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Marginal ice zone dynamics: history, definitions and research perspectives. 边缘冰带动力学:历史、定义和研究前景。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-10-31 Epub Date: 2022-09-12 DOI: 10.1098/rsta.2021.0253

Dany Dumont

{"title":"Marginal ice zone dynamics: history, definitions and research perspectives.","authors":"Dany Dumont","doi":"10.1098/rsta.2021.0253","DOIUrl":"https://doi.org/10.1098/rsta.2021.0253","url":null,"abstract":"Despite enormous scientific and technological progress in numerical weather and climate prediction, sea ice still remains unreliably predicted by models, both in short-term forecasting and climate projection applications. The total ice extent in both hemispheres is tied to the location of the ice edge, and consequently to what happens in the portion of the ice cover immediately adjacent to the open ocean that is called the marginal ice zone (MIZ). There is mounting evidence that processes occurring in the MIZ might play an important role in the polar climate of both hemispheres, yet some key physical processes are still missing in models. As sea ice models developed for climate studies are increasingly used for operational forecasting, the missing physics also impede short-term sea ice prediction skills. This paper is a mini-review that provides a historical perspective on how MIZ research has progressed since the 1970s, with a focus on the fundamental importance of the interactions between sea ice and surface gravity waves on sea ice dynamics. Completeness is not achieved, as the body of literature is huge, scattered and rapidly growing, but the intention is to inform future collaborative research efforts to improve our understanding and predictive capabilities of sea ice dynamics in the MIZ. This article is part of the theme issue 'Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20210253"},"PeriodicalIF":5.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33459157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Modelling attenuation of irregular wave fields by artificial ice floes in the laboratory. 实验室人工浮冰对不规则波场衰减的模拟。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-10-31 Epub Date: 2022-09-12 DOI: 10.1098/rsta.2021.0255

A Toffoli, J P A Pitt, A Alberello, L G Bennetts

{"title":"Modelling attenuation of irregular wave fields by artificial ice floes in the laboratory.","authors":"A Toffoli, J P A Pitt, A Alberello, L G Bennetts","doi":"10.1098/rsta.2021.0255","DOIUrl":"https://doi.org/10.1098/rsta.2021.0255","url":null,"abstract":"A summary is given on the utility of laboratory experiments for gaining understanding of wave attenuation in the marginal ice zone, as a complement to field observations, theory and numerical models. It is noted that most results to date are for regular incident waves, which, combined with the highly nonlinear wave-floe interaction phenomena observed and measured during experimental tests, implies that the attenuation of regular waves cannot necessarily be used to infer the attenuation of irregular waves. Two experiments are revisited in which irregular wave tests were conducted but not previously reported, one involving a single floe and the other a large number of floes, and the transmission coefficients for the irregular and regular wave tests are compared. The transmission spectra derived from the irregular wave tests agree with the regular wave data but are overpredicted by linear models due to nonlinear dissipative processes, regardless of floe configuration. This article is part of the theme issue 'Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20210255"},"PeriodicalIF":5.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9653260/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33459161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10