检索结果-南通市图书馆

Constitutive modeling for mechanical behaviors of geomaterials, newdesigns and techniques in geotechnical engineering

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2016年第3期8卷 275-276页

作者： chandrakant s.desai Yang Xiao Department of Civil Engineering and Engineering Mechanics University of Arizona Tucson AZ 85721 USA school of Civil Engineering Chongqing UniversitychongqingChina

This special Issue of the Journal of Rock Mechanics and GeotechnicalEngineering （JRMGE） contains 13 papers prepared by internationalexperts on various general topics in geomechanics, rockmechanics and geotechnical engineering. It represents a usefulmix of theoretical developments, testing and practical *** present in the following brief details in the papers, alphabeticallyin accordance with the last name of the first *** presents a review of tunneling techniques with emphasison the full-face method combining full-face excavation and facereinforcement by means of fiber-glass elements with a yieldcontrolsupport. This method has been used successfully in difficultgeologic conditions, and for a wide spectrum of ground *** validation of the method with respect to the saint Martin LaPorte access adit along the LyoneTurin Base tunnel experiencingseverely squeezing conditions during excavation is also includedin the paper. The numerical modeling with consideration of therock mass time-dependent behavior showed a satisfactory agreementwith monitoring results.

关键词： Constitutive modeling for mechanical behaviors of geomaterials new designs and techniques in geotechnical engineering

Constitutive Modeling of Geologic Materials Using Disturbed state Concept(DsC) and Applications

在线全文

学校读者我要写书评

暂无评论

Constitutive Modeling of Geologic Materials Using Disturbed ...

Grain crushing in geoscience materials-Key issues on crushing response,measurement and modeling:Review and preface

第十二次全国岩石力学与工程学术大会

作者： chandrakant s.desai Department of Civil Engineering and Engineering Mechanics University of Arizona

Characterization of mechanical behavior of engineering materials,interface and joints require consideration of a number of significant factors that influence the *** materials(soils and rocks),interfaces and joints in them assume greater importance because of the complex and challenging nature of their composition,and *** advanced computer methods such as the finite element method are capable of handling such challenging behavior,it becomes imperative to develop constitutive models that can allow for the

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Geoscience Frontiers 2020年第2期11卷 363-374页

作者： Yang Xiao chandrakant sdesai Ali Daouadji Armin Wstuedlein Hanlong Liu Hossam Abuel-Naga Key Laboratory of New Technology for Construction of Cities in Mountain Area Chongqing UniversityChongqing 400045China school of Civil Engineering Chongqing UniversityChongqing 400045China Dept.of Civil Engineering and Engineering Mechanics Univ.of ArizonaTucsonAZ85721USA Universite de Lyon INSA LYONLaboratoire GEOMASJ.C.A.Coulomb34 Avenue des Arts69621VilleurbanneFrance school of Civil and Construction Engineering Oregon State UniversityCorvallisOR97331USA Chongqing University Chongqing 400045China school of Engineering and Mathematical sciences La Trobe UniversityVictoria3086Australia

Grain crushing is commonly encountered in deep foundation engineering,high rockfill dam engineering,railway engineering,mining engineering,coastal engineering,petroleum engineering,and other geoscience *** crushing is affected by fundamental soil characteristics,such as their mineral strength,grain size and distribution,grain shape,density and specimen size,and also by external factors including stress magnitude and path,loading rate and duration,degree of saturation,temperature and geochemical *** material becomes a series of different materials with the change in its grading during grain crushing,resulting in a decrease in strength and dilatancy and an increase in *** of grain crushing on strength,dilatancy,deformation and failure mechanisms have been extensively investigated through laboratory testing,discrete element method(DEM)modelling,Weibull statistics,and constitutive modelling within the framework of the extended crushing-dependent critical state theory or the energy-based *** papers summarized in this review article for this special issue addressed the above issues in grain crushing through the advanced testing and modelling.

关键词： Grain crushing Particle breakage strength Dilatancy DEM modelling Constitutive modelling

A Typical Review on static Reconfiguration strategies in Photovoltaic Array Under Non-Uniform shading Conditions

在线全文

学校读者我要写书评

暂无评论

CsEE Journal of Power and Energy systems 2023年第6期9卷 2018-2039页

作者： Chavan Vinaya chandrakant suresh Mikkili Department of Electrical and Electronics Engineering National Institute of Technology GoaIndia

Maximum power extraction from the photovoltaic(PV) system plays a critical role in increasing efficiency duringpartial shading conditions (PsCs). It directly reduces the outputpower of the PV array. There are different factors, such as bypassdiode configuration, array size, array configuration, shade intensity, environmental conditions etc., affecting the performance ofthe solar photovoltaic panel. Furthermore, series (s), parallel (P),series-parallel (sP), total-cross-tied (TCT), bridge-linked (BL),and honey-comb (HC), etc., are the various configurations to dealwith the mentioned issues. But these PV array configurations alsohave drawbacks, such as low dispersion factor, mismatch losses,and line losses under partial shading conditions. To overcomethese issues, the reconfiguration of the PV array is one of theeffective approaches. A comprehensive study of literature showsthat PV modules are connected under different reconfiguredschemes namely sudoku, Optimal sudoku, Magic square, zigzag, skyscraper, etc. In this paper, a comprehensive review isperformed to highlight the advantages and limitations of eachscheme. This study can be used to address the advancementin this area since some parameter comparisons are made at theend of every technique, which might be a prominent base-rule forpicking the most promising reconfiguration technique for furtherresearch.

关键词： Data visualization fault diagnosis IoT network photovoltaic system wireless remote monitoring

Comparative analysis of single-crater parameters in ultrasonic-assisted and unassisted micro-EDM of Ti6Al4V using discharge plasma imaging

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nanotechnology and Precision Engineering 2024年第2期7卷 11-24页

作者： sohaib Raza chandrakant Nirala Department of Mechanical Engineering Indian Institute of Technology RoparPunjab 140001India

Ultrasonic-assisted micro-electro-discharge machining(EDM)has the potential to enhance processing responses such as material removal rate(MRR)and surface *** understand the reasons for this enhancement,the physical mechanisms responsible for the individual discharges and the craters that they form need to be *** work examines features of craters formed by single discharges at various parameter values in both conventional and ultrasonic-assistedEDM of ***-speed imaging of the plasma channel is performed,and data on the individual discharges are captured in real-time.A 2D axisymmetric model using finite element software is established to model crater *** the basis of simulation and experimental results,a comparative study is then carried out to examine the effects of ultrasonic vibrational assistance on crater *** every set ofEDM parameters,the crater diameter and depth from a single discharge are found to be higher in ultrasonic-assistedEDM than in conventional*** improved crater geometry and the reduced bulge formation at the crater edges are attributed to the increased melt pool velocity and temperature predicted by the model.

关键词： Ultrasonic vibration Discharge crater Plasma diameter single discharge

Conservation of an important montane bamboo Thamnocalamus falconeri, *** Munro through axillary bud proliferation

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2015年第1期26卷 179-185页

作者： Meena Bakshi chandrakant Tiwari sajad Razvi Plant Physiology Discipline Botany DivisionForest ResearchInstitute

Thamnocalamus falconeri, Hook.f. ex Munro.,an important bamboo species belonging to the family Poaceae, locally known as Ringal, occurs in the hills of Uttarakhand, India. This species has been traditionally exploited by local communities to support their *** needs of the hill villages impose unsustainable pressure on natural stands of Ringal in the Uttarakhand hills and forests have been degraded. The long history of excessive cutting of Ringal from natural forests and the lack of replanting threaten villager livelihoods. Replanting is required to conserve the species. We propose a protocol for generation of planting material through axillary bud proliferation for multiplication and conservation of this species. We collected offsets/rhizomes from a natural stand of T. falconeri in the Chopta Mandal areas（Chamoli district, India）. These were planted at sites of varied elevation and fresh single nodal segments were collected from them as explants. Different sterilization treatments were assessed to combat contamination. Among these, treatment of 0.1 %Hg Cl2 followed by 5 % Na OCl, proved best. Among two cytokinin treatments, viz. BAP and Kinetin, singly or in combination, BAP alone（5 mg L-1） proved superior and resulted in 100 % bud break. BAP-supplemented Ms media yielded maximum vigorous shoot formation（90 %）and maximum number of shoots（8.9）. subculturing of shoots on the same medium with similar BAP treatment（5 mg L-1BAP） enabled continuous production of healthy shoots at similar frequency. Maximum rooting（100 %）was recorded on half-strength Ms medium supplemented with 5 mg L-1IBA. Micropropagated plants were hardened and acclimatized in soil mixture（2：1：1） and then transplanted to field sites（Magra, Uttarakhand, 1,834 m）.Eight to ten months after field transplantation we recorded100 % survival of transplanted material. This micropropagation protocol could be used successfully for raising a stock of genetically homogenous plant material in bulk

关键词： Thamnocalamus falconeri Micropropagation Ms medium Axillary bud proliferation Hormones

Advancement in CFD and Responsive AI to Examine Cardiovascular Pulsatile Flow in Arteries:A Review

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & sciences 2024年第12期141卷 2021-2064页

作者： Priyambada Praharaj chandrakant R.sonawane Arunkumar Bongale Department of Engineering science and Humanities JSPM Rajarshi Shahu College of EngineeringPune411033India Robotics and Automation Department Symbiosis Institute of TechnologySymbiosis Institute(Deemed)UniversityPune412115India

This paper represents a detailed and systematic review of one of the most ongoing applications of computational fluid dynamics(CFD)in biomedical *** its various engineering applications,CFD has started to establish a presence in the biomedical *** abnormality,a familiar health issue,is an essential point of investigation by research *** modalities provide cardiovascular structural information but give insufficient information about the hemodynamics of *** study of hemodynamic parameters can be a potential measure for determining cardiovascular *** studies have explored the rheological behavior of blood experimentally and *** paper provides insight into how researchers have incorporated the pulsatile nature of the blood experimentally,numerically,or through various simulations over the *** focuses on how machine learning platforms derive outputs based on mass and momentum conservation to predict the velocity and pressure profile,analyzing various cardiac diseases for clinical *** will pave the way toward responsive AI in cardiac healthcare,improving productivity and quality in the healthcare *** paper shows how CFD is a vital tool for efficiently studying the flow in *** review indicates this biomedical simulation and its applications in healthcare using machine learning and *** AI-based CFD models can impact society and foster the advancement towards responsive AI.

关键词： Pulsatile flow cardiovascular CFD simulation patient-specific GPU-accelerated responsive AI

A New Proximity Indicator for Assessment of Voltage stability and Critical Loadability Point

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2022年第3期119卷 947-963页

作者： chandrakant Dondariya D.K.sakravdia Department of Electrical Engineering Ujjain Engineering CollegeUjjainIndia

This paper presents a newly developed proximity indicator for voltage stability assessment which can be used to predict critical real system load and voltages at various load buses at critical loading *** proximity indicator varies almost parabolic with total real load demand and reaches orthogonally to real load *** relation has been utilized to predict critical loading *** has been shown that two operating points are needed for estimating critical point and proper selection of operating points and variation of proximity indicator near collapse point highly affect the accuracy of *** is based on load flow equations and system real and reactive loadings have been increased in proportion with base case scenario for IEEE 14 and IEEE 25 bus test systems to demonstrate the behaviour of proposed proximity *** has been used as benchmark to check the accuracy of estimation.

关键词： Voltage stability voltage collapse proximity indicator critical loading CPF

Temperature field characteristics of CF/PEEK thermoplastic composites formed by automated fiber placement using hot gas torch with slit structure nozzle

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第6期37卷 392-409页

作者： Ziang JIN shouzheng sUN sunil chandrakant JOsHI Zhenyu HAN Hongya FU state Key Laboratory of Robotics and system Harbin Institute of TechnologyHarbin 150001China school of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore

In-situ consolidation forming of high-performance thermoplastic composites by Automated Fiber Placement(AFP)is of significant interest in *** the laying process,the heating temperature has a great influence on the quality of the formed components.A threedimensional heat transfer finite element model of Carbon Fiber(CF)/Polyether Ether Ketone(PEEK)heated by slit structure Nozzle Hot Gas Torch(ssNHGT)assisted AFP is *** influence of gas flow rate,heat transfer distance,and laying speed on heating temperature is *** results show that the overall temperature increases and then decreases as the gas flow rate *** the increase in heat transfer distance and laying speed,the overall temperature ***,the gas flow rate has the greatest influence on the temperature of CF/PEEK being heated,followed by the laying speed and finally the heat transfer ***,the model can also be extended to other fiber-reinforced polymer composites formed by hot gas torch assisted AFP,which can guide the optimization of process parameters for subsequent heating temperature control.

关键词： Fiber reinforced plastics Thermoplastics Heating temperature Automated fiber placement CF/PEEK