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Accounting for anisotropic effects in the prediction of the hydro-mechanical response of a ventilated tunnel in an argillaceous rock

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Journal of Rock Mechanics and Geotechnical Engineering 2013年第2期5卷 97-109页

作者： Alain Millard Alex Bond Shigeo Nakama Chengyuan Zhang Jean-dominique Barnichon Benoit Garitte Commissariatà l'Energie Atomique et aux Energies Alternatives Gif-sur-Yvette France Quintessa Ltd. Chadwick House Birchwood Park Warrington Cheshire WA3 6AE UK Japan Atomic Energy Agency Tokai Japan Insititute of Rock and Soil Mechanics Chinese Academy of Sciences Institute for Nuclear Radioprotection and Safety Fontenay-aux-roses France Universidad Politécnica de Catalunya Barcelona Spain

In order to investigate the hydro-mechanical （HM） and chemical perturbations induced in an argillaceous formation by forced ventilation during the operational period of a nuclear waste repository, a specific experiment has been performed in a tunnel, at Mont Terri Underground Research Laboratory （URL） in Switzerland. This experiment has been selected in the international project DECOVALEX for model vali- dation and the numerical simulation of this ventilation experiment （VE） is the object of the present paper. Since the argillaceous rock exhibits anisotropic properties, particular attention is given to the evaluation of the effects of various anisotropic features on the predicted results. In situ measurements such as relative humidity （RH）, global water mass extracted, pore water pressure, water content, and relative displace- ments are compared to predictions using both isotropic and anisotropic parameters. Water permeability anisotropy is shown to be the most influencing parameter by far, whereas in situ stress anisotropy has an effect only during the excavation phase. The anisotropy for mechanical parameterization has also some influence, in particular through HM couplings. These HM couplings have the potential to be very significant in terms of providing confidence in describing the experimental observation, and should be considered for further investigation.

关键词： Hydro-mechanical (HM) coupling Numerical modelling Anisotropy Mont Terri Underground Research Laboratory (URL) Ventilation experiment (VE) Argillite

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Computational design for 4D printing of topology optimized multi-material active composites

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npj Computational Materials 2023年第1期9卷 2342-2350页

作者： Darshan Athinarayanarao Romaric Prod’hon dominique Chamoret H.Jerry Qi Mahdi Bodaghi Jean-Claude André Frédéric Demoly ICB UMR 6303 CNRS Univ.Bourgogne Franche-ComtéUTBM90010 BelfortFrance The George W.Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA Department of Engineering School of Science and TechnologyNottingham Trent UniversityNottingham NG118NSUK LRGP UMR 7274 CNRS University of LorraineNancyFrance

Recent efforts on design for four-dimensional(4D)printing have considered the spatial arrangement of smart materials and energy *** development of multifunctional structures and their desired mechanical/actuation performances require tackling 4D printing from a multi-material design *** the materials distributions there is an opportunity to increase the spectrum of design concepts with computational *** main goal being to achieve the“best”distribution of material properties in a voxelized structure,a computational framework that consists of a finite element analysis-based evolutionary algorithm is *** fuses the advantages of optimizing both the materials distribution and material layout within a design space via topology optimization to solve the inverse design problem of finding an optimal design to achieve a target shape change by integrating void *** results demonstrate the efficacy of the proposed method in providing a highly capable tool for the design of 4D-printed active composites.

关键词： composites printing topology

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Microstructure and anisotropic swelling behaviour of compacted bentonite/sand mixture

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Journal of Rock Mechanics and Geotechnical Engineering 2014年第2期6卷 126-132页

作者： Simona Saba Jean-dominique Barnichon Yu-Jun Cui Anh Minh Tang Pierre Delage Ecole des Ponts ParisTech Laboratoire Navier Institut de Radioprotection et de Surete Nucleaire(IRSN)

Pre-compacted elements （disks, tutus） of bentonite/sand mixture are candidate materials for sealing plugs of radioactive waste disposal. Choice of this material is mainly based on its swelling capacity allowing all gaps in the system to be sealed, and on its low permeability. When emplaced in the gallery, these elements will start to absorb water from the host rock and swell. Thereby, a swelling pressure will develop in the radial direction against the host rock and in the axial direction against the support structure. In this work, the swelling pressure of a small scale compacted disk of bentonite and sand was experimentally studied in both radial and axial directions. Different swelling kinetics were identified for different dry densities and along different directions. As a rule, the swelling pressure starts increasing quickly, reaches a peak value, decreases a little and finally stabilises. For some dry densities, higher peaks were observed in the radial direction than in the axial direction. The presence of peaks is related to the microstructure change and to the collapse of macro- pores. In parallel to the mechanical tests, microstructure investigation at the sample scale was conducted using microfocus X-ray computed tomography （BCT）. Image observation showed a denser structure in the centre and a looser one in the border, which was also confirmed by image analysis. This structure heterogeneity in the radial direction and the occurrence of macro-pores close to the radial boundary of the sample can explain the large peaks observed in the radial swelling pressure evolution. Another interesting result is the higher anisotropy found at lower bentonite dry densities, which was also analysed by means ofμCT observation of a sample at low bentonite dry density after the end of test. It was found that the macro-pores, especially those between sand grains, were not filled by swelled bentonite, which preserved the anisotropic microstructure caused by uniaxial compression

关键词： Bentonite/sand mixture Nuclear waste disposal Anisotropy Swelling pressure Microstructure Microfocus X-ray computed tomography(μCT)

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+THE GREAT DEBATE The Chinese Teens Learning How to Argue…in English

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城市漫步（GBA版） 2017年第10期 12-16页

作者： dominique Wong 不详

"Where is the money going to come from?"a Chinese teenager shouts."The government can print more money!"her opponent ***’s day one of the National High School Debate League Competition(NHSDLC)championship finals,and two high school students are arguing over whether the US should implement a Universal Basic *** a high school classroom in west Beijing,kids are arguing in English.

关键词： money Basic classroom

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dominique Cardon:新型信息环路——用数字方法研究数字公共空间(2019年12月16日)

中国传播学评论

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中国传播学评论 2020年 165-166页

作者： dominique Cardon 巴黎政治大学

我先介绍我所在的媒体实验室。我们对媒体实验室的定义是:"媒体实验室是必不可少的工具,相当于大学的图书馆、硬科学学科的大型设备、海洋学家的船。"实验室的成员来自不同的学科领域,有计算机科学的研究者,有数字方法和软件设计者,也...

我先介绍我所在的媒体实验室。我们对媒体实验室的定义是:"媒体实验室是必不可少的工具,相当于大学的图书馆、硬科学学科的大型设备、海洋学家的船。"实验室的成员来自不同的学科领域,有计算机科学的研究者,有数字方法和软件设计者,也有社会科学的研究者,有时候他们会集合在一起数天,共同完成一项任务。媒体实验室的使命是设计更多的数字研究工具,以帮助更多社会科学研究者展开对数字网络的研究,使处理更大量的文章和数据库成为可能。

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Auto-versus allo-transplantation of the liver for end-stage alveolar echinococcosis？

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Chinese Medical Journal 2011年第18期000卷 2803-2805页

作者： Georges A Mantion dominique A Vuitton WHO-Collaborating Centre for Prevention and Treatment of Human Echinococcosis Department of Digestive and Cancer Surgery/Liver Transplantation Unit University Hospital and University of Franche-Comt6 France

＂We dreamt of it; they did it!＂ Reading the paper by WEN et al in this issue of the Chinese Medical Journal,＂ we can not help but remember when our colleague Prof. Jean-Philippe Miguet, a hepatologist who was the first at the beginning of the 1970s to review the clinical cases of alveolar echinococcosis （AE） observed in our region of Eastern France and to renew our interest in that disease, used to tell Prof. Michel Gillet,

关键词：法国钙调蛋白结合蛋白质类肝棘球蚴病磷蛋白磷酸酶类内皮缩血管肽类世界卫生组织亚洲大陆世系人群

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THE ONLY ONE The One-Child Generation Comes of Age

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城市漫步（GBA版） 2016年第1期 12-14,16页

作者： dominique WONG 不详

The govemment's announcement in late October that all couples in China will be allowed to have two children was met with a collective sigh of relief-and,in some cases,*** although the one-child policy may soon become ... 详细信息

关键词： collective likely policy

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Evaluation of an Ultrasound-Guided Focused Ultrasound CMUT Probe for Targeted Therapy Applications

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Open Journal of Applied Sciences 2018年第1期8卷 25-45页

作者： dominique Gross Mathieu Legros Philippe Vince dominique Certon VERMON SA Tours France Franç ois-Rabelais University CETU Altha&iuml s Technologies Tours France GREMAN UMR 7347 Université de Tours CNRS INSA Centre Val de Loire Tours France

Capacitive Micromachined Ultrasonic Transducer (CMUT) technology, which has been widely studied in the field of medical imaging, possesses strong design flexibility due to its manufacturing process. Many applications could benefit from this unique feature, especially those that require different operating ultrasonic frequencies. This article reports on the characterization of the therapeutic low-frequency field provided by an ultrasound-guided focused ultrasound CMUT probe that is connected to a custom ultrasonic scanner for hyperthermia applications. The study begins by mapping the focused ultrasonic beam in the vicinity of the focal spot and a parametric analysis providing the maximum peak-to-peak (PTP) pressure delivered by the probe under different acoustic conditions. The measured maximum PTP pressure at the targeted operating frequency of 1 MHz is 3 MPa, with a maximum of 3.6 MPa at 1.25 MHz. Based on an in vitro setup found in the literature, the temperature elevation at the focal point was measured, showing results in agreement with the targeted applications (max. ΔT = 7.5°C). The article concludes with a reliability study considering the delivered pressure and the self-heating of the CMUT probe: the results show the good stability of the pressure amplitude over 1.8 × 109 cycles at a duty cycle of 40%, with a moderate internal heating of 3°C.

关键词： Capacitive Micromachined Ultrasonic Transducers CMUT USgFUS Targeted Therapy

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CLEARING THE AIR The Air Purifier Designed ForYour Face

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城市漫步（上海版、英文） 2018年第2期 24-25页

作者： dominique Wong 不详

The next generation pollution mask is ***,according to makers Blue Sky Lab,ATMOBLUE is not a mask at all,but a wearable air purifier providing pure air everywhere you *** comes packed with sensor technology to automatically adjust airflow,a futuristic design,and the efficiency to filter out up to 99.97 percent of air particle *** a battery life of approximately three years,and smartphone pairing,this isn't your average 3M *** found out more about the com-pany's first-released product from co-founder and Chief of Product Simon Kubski.

关键词： pairing battery packed

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THE FIGHTING FANS Meet the Devoted Super Fans of China’s Hottest Boyband

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城市漫步（GBA版） 2017年第2期 28-29页

作者： dominique Wong 不详

Three boys with matching bowl haircuts smile innocently from 37-year-old Ma Huiliang’s*work computer *** same faces adorn photos and cards strewn across her *** these young boys aren’t Ma’s *** are members of China’s most popular band:TFBoys(‘The Fighting Boys’).TFBoys are a trio of teenagers–Karry Wang,Roy Wang and Jackson Yi,to use their English names–hailing from Chongqing and *** the band’s debut in 2013,the boys have been singing,dancing,rapping and even beatboxing their way into Chinese *** are often cited as the biggest Mando-pop band of all time.

关键词： Chongqing Boy matching

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