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扩展Saint Venant方程组在河网水力计算中的应用 被引量:4
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作者 张静怡 徐小明 王如云 《河海大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第6期104-107,共4页
对扩展形式的Saint Venant方程组建立了Preissmann加权四点隐式格式,而离散所得的非线性代数方程组则用收敛速度较快的Newton Raphson迭代法进行求解,并将该解法成功地用于上海市具有数百条河道的大型河网水力数值计算中,模拟了降雨及... 对扩展形式的Saint Venant方程组建立了Preissmann加权四点隐式格式,而离散所得的非线性代数方程组则用收敛速度较快的Newton Raphson迭代法进行求解,并将该解法成功地用于上海市具有数百条河道的大型河网水力数值计算中,模拟了降雨及闸门在各种运行方式下的水力问题,取得了令人满意的结果. 展开更多
关键词 扩展saint-Venat方程组 河网 数值模拟
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Saint—Venant方程组的弱解
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作者 刘法贵 朱立新 《华北水利水电学院学报》 1996年第4期37-41,共5页
讨论了Saint-Venant方程组ut+(uv)x=0vt+gB(u)ux+vvx=0利用补偿紧致方法证明了共Cauchy问题弱解的存在性定理
关键词 补偿紧致 熵-熵流对 saint-Venant 方程组 弱解
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一种维持Saint-Venant方程组移动稳态解的中心格式 被引量:2
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作者 罗一鸣 李订芳 +1 位作者 刘敏 董建 《数学物理学报(A辑)》 CSCD 北大核心 2022年第3期891-903,共13页
针对S aint-Venant方程组提出了一种具有二阶精度的非交错中心有限体积格式.相较于经典中心格式为维持静稳态解选择重构守恒变量和水位值,但在求解移动稳态问题时会产生巨大误差,格式通过重构守恒变量和能量值,以及一种新的源项离散方... 针对S aint-Venant方程组提出了一种具有二阶精度的非交错中心有限体积格式.相较于经典中心格式为维持静稳态解选择重构守恒变量和水位值,但在求解移动稳态问题时会产生巨大误差,格式通过重构守恒变量和能量值,以及一种新的源项离散方法能够精确维持移动稳态解并捕捉其小扰动.最后,通过一些经典数值算例验证了格式的收敛性,谐性以及稳健性. 展开更多
关键词 saint-Venant方程组 非交错中心格式 移动稳态
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Hamilton体系与与弹性力学Saint-Venant问题 被引量:8
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作者 钟万勰 徐新生 张洪武 《应用数学和力学》 CSCD 北大核心 1996年第9期781-789,共9页
本文一改传统的在Lagrange体系欧几里德空间中用半道法讨论Saint-Venant问题的方法,而在具有守恒性的Hamilton体系中辛空间里研究该问题.通过讨论Hamilton算子矩阵的零本征值及其Jordan型... 本文一改传统的在Lagrange体系欧几里德空间中用半道法讨论Saint-Venant问题的方法,而在具有守恒性的Hamilton体系中辛空间里研究该问题.通过讨论Hamilton算子矩阵的零本征值及其Jordan型,直接求解出全部Saint-Venant问题的解. 展开更多
关键词 HAMILTON体系 辛空间 弹性力学 S-V问题
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一类二阶抛物方程不适定问题的Saint-Venant原理 被引量:1
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作者 寇艳蕾 《华南师范大学学报(自然科学版)》 CAS 2003年第1期24-29,共6页
在三维半无限带状区域上对一类二阶抛物方程不适定问题建立了Saint-Venant原理 ,采用的方法是将问题转化为解一阶微分不等式 .
关键词 saint-Venant原理 不适定问题 二阶抛物方程
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Saint-Venant方程组Crank-Nicolson格式离散与学习控制建模 被引量:1
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作者 李光 戴喜生 《计算技术与自动化》 2017年第1期6-11,共6页
研究了Saint-Venant方程组的Crank-Nicolson格式离散化并建立学习控制模型.首先给出了表示明渠流水流质量和动量守恒的Saint-Venant方程组,并线性化;其次,采用Crank-Nicolson格式进行离散,得到了无条件稳定的离散化方程组;最后通过离散... 研究了Saint-Venant方程组的Crank-Nicolson格式离散化并建立学习控制模型.首先给出了表示明渠流水流质量和动量守恒的Saint-Venant方程组,并线性化;其次,采用Crank-Nicolson格式进行离散,得到了无条件稳定的离散化方程组;最后通过离散化后得到的状态空间方程,建立了基于迭代学习控制的数学模型,为后续进一步研究算法的收敛性奠定了基础. 展开更多
关键词 saint-Venant方程 离散化 Crank-Nicolson格式 迭代学习控制
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Impact of Urban Anthropogenic Pressures on the Mangrove Forest of Sainte Marie (East Madagascar) 被引量:2
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作者 Andriamparany Rakotomavo Rita Marie Michele Rasoamanarivo Polinah Razanajaza 《Open Journal of Forestry》 2018年第3期380-392,共13页
This article demonstrates the urban anthropogenic threats and their impacts on Sainte Marie (Eastern Madagascar) mangrove ecosystem. In addition to conducting interview with 158 residents, floristic inventories were c... This article demonstrates the urban anthropogenic threats and their impacts on Sainte Marie (Eastern Madagascar) mangrove ecosystem. In addition to conducting interview with 158 residents, floristic inventories were carried out in order to compare the mangrove structure between a control site and another one that was impacted by Belle Vue dyke (south of the District downtown) rehabilitation. From 2003 to 2014, the island of Sainte Marie lost 0.47% per year of its mangrove area. 87% of the harvested resources from this ecosystem are fish products and are related to human nutrition. The mangrove is used as a dumping ground for liquid and solid waste in the lots of Saint Joseph and La Pointe. Defecation in the open air is topical under the island’s mangrove forest. A very weak resilience of the mangrove impacted by the rehabilitation of Belle Vue dyke was noted. Indeed, regenerations of Bruguiera gymnorrhiza and Ceriops tagal have struggled to rebuild. The total height and diameter of impacted trees decreased by 37.2% and 44.3%, respectively. The development of an updated urban master plan, including mangroves in the related zoning process is an imperative measurement for the conservation and/or valuation of existing lots. 展开更多
关键词 MANGROVE sainte Marie URBAN PLANNING URBAN Threats RESILIENCE MANGROVE REGENERATION
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中心格式在Saint-Venant方程组上的应用研究 被引量:3
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作者 董建 《数学物理学报(A辑)》 CSCD 北大核心 2019年第2期372-385,共14页
浅水波方程组对于其数值格式有较高的要求.在实际应用中作者更关心在稳态解附近的行为,特别是当计算区域出现干湿界面的时候,不但要求格式具有和谐性,而且需要保持水深恒为非负,同时又要求数值格式具有较高的精度.设计同时满足这些性质... 浅水波方程组对于其数值格式有较高的要求.在实际应用中作者更关心在稳态解附近的行为,特别是当计算区域出现干湿界面的时候,不但要求格式具有和谐性,而且需要保持水深恒为非负,同时又要求数值格式具有较高的精度.设计同时满足这些性质的数值格式具有一定的难度.论文的核心是总结研究了受关注的求解浅水波方程组的中心格式:KP格式,BCKN格式和T格式的各自优势以及不足之处.该文通过求解一维问题来展示各自格式在一些算例上的应用. 展开更多
关键词 saint-Venant方程组 有限体积法 和谐性 保正性
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Bedouin farms in the Saint Katherine mountainous area(South Sinai,Egypt) 被引量:1
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作者 Kamal H.SHALTOUT Khaled H.EL-HAMDI +1 位作者 Safaa A.EL-MASRY Ebrahem M.EID 《Journal of Mountain Science》 SCIE CSCD 2019年第10期2232-2242,共11页
This study aims to assess the natural and cultivated plant species in 26 Bedouin farms in Saint Katherine Protectorate(SKP),identify their soil and water characteristics,and assess the suitability of these farms for t... This study aims to assess the natural and cultivated plant species in 26 Bedouin farms in Saint Katherine Protectorate(SKP),identify their soil and water characteristics,and assess the suitability of these farms for the cultivation of some wild medicinal plants.The farms were selected to represent wide wadis with deep sand and clay deposits,gorge-like wadis covered with rock fragments of different sizes,spot-like oases,and the Al Q’aa Plain.Using TWINSPAN(two-way indicator species analysis)and DCA(detrended correspondence analysis)techniques,the 26 farms were classified into 5 groups(Ⅰ-Ⅴ)based on their floristic composition of wild plants.These groups reflect an elevation gradient among the farms above sea level from a mean of 119 m to a mean of1,865m.A total of 73 wild species were recorded,with47 in groupⅡ(500-1,000 m)and 25 in group V(>1,700 m).The common target species were Artemisia judaica,Acacia tortilis subsp.raddiana,Origanum syriacum subsp.sinaicum and Varthemia montana(34.6%-26.9%).The cultivated speciesnumbered 25,with 17 in groupⅡ(500-1,000 m)andⅡin groupⅣ(1,500-1,700 m).The common fruit trees were olive,grape,fig,apple,palm,almond,apricot and pomegranate(73.0%-42.3%).Based on the soil characteristics,13 farms belong to soil class 2that describes good soils with moderate limitations,and 12 belong to soil class 3 that describes moderately good soils,which can be used regularly for crops after proper treatment. 展开更多
关键词 AGROFORESTRY saint Katherine Protectorate Wild medicinal plants Elevation gradient Multivariate analysis Wadi Feiran
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DECAY RATE OF SAINT-VENANT END EFFECTS FOR PLANE DEFORMATIONS OF PIEZOELECTRIC-PIEZOMAGNETIC SANDWICH STRUCTURES 被引量:2
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作者 Yan Xue Jinxi Liu 《Acta Mechanica Solida Sinica》 SCIE EI 2010年第5期407-419,共13页
This paper is concerned with the decay of Saint-Venant end effects for plane deformations of piezoelectric (PE)-piezomagnetic (PM) sandwich structures, where a PM layer is located between two PE layers with the sa... This paper is concerned with the decay of Saint-Venant end effects for plane deformations of piezoelectric (PE)-piezomagnetic (PM) sandwich structures, where a PM layer is located between two PE layers with the same material properties or reversely. The end of the sandwich structure is subjected to a set of self-equilibrated magneto-electro-elastic loads. The upper and lower surfaces of the sandwich structure axe mechanically free, electrically open or shorted as well as magnetically open or shorted. Firstly the constitutive equations of PE mate- rials and PM materials for plane strain are given and normalized. Secondly, the simplified state space approach is employed to arrange the constitutive equations into differential equations in a matrix form. Finally, by using the transfer matrix method, the characteristic equations for eigen- values or decay rates axe derived. Based on the obtained characteristic equations, the decay rates for the PE-PM-PE and PM-PE-PM sandwich structures are calculated. The influences of the electromagnetic boundary conditions, material properties of PE layers and volume fraction on the decay rates are discussed in detail. 展开更多
关键词 saint-Venant's principle decay rate end effect piezoelectric material piezomag- netic material sandwich structure plane deformation
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Modified Saint-Venant equations for flow simulation in tidal rivers 被引量:3
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作者 Xiao-qin ZHANG Wei-min BAO 《Water Science and Engineering》 EI CAS 2012年第1期34-45,共12页
Flow in tidal rivers periodically propagates upstream or downstream under tidal influence. Hydrodynamic models based on the Saint-Venant equations (the SVN model) are extensively used to model tidal rivers. A force-... Flow in tidal rivers periodically propagates upstream or downstream under tidal influence. Hydrodynamic models based on the Saint-Venant equations (the SVN model) are extensively used to model tidal rivers. A force-corrected term expressed as the combination of flow velocity and the change rate of the tidal fevel was developed to represent tidal effects in the SVN model. A momentum equation incorporating with the corrected term was derived based on Newton's second law. By combing the modified momentum equation with the continuity equation, an improved SVN model for tidal rivers (the ISVN model) was constructed. The simulation of a tidal reach of the Qiantang River shows that the ISVN model performs better than the SVN model. It indicates that the corrected force derived for tidal effects is reasonable; the ISVN model provides an appropriate enhancement of the SVN model for flow simulation of tidal rivers. 展开更多
关键词 tidal river tidal effect dynamic water pressure saint-Venant equations corrected force flow simulation
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Giorgio Vasari's Saint Michael: A Symbol of Neoplatonic Light 被引量:1
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作者 Liana De Girolami Cheney 《Cultural and Religious Studies》 2015年第3期152-166,共15页
This essay includes a brief explanation of who is Michael The Archangel; discusses the manifold depictions of Saint Michael in Italian Renaissance art, in particular in Giorgio Vasari's imagery; and examines the impa... This essay includes a brief explanation of who is Michael The Archangel; discusses the manifold depictions of Saint Michael in Italian Renaissance art, in particular in Giorgio Vasari's imagery; and examines the impact of Neoplatonism in the interpretation of The Archangel and Michael's symbolic role. The Renaissance Neoplatonic philosopher Marsilio Ficino explained the signification of the Platonic celestial ladder as a spiritual vehicle for the human soul to achieve the divine's love. One step of this ladder is the Angelic Mind. The sparkling light of the Angelic Mind's realm reveals the splendor and beauty of God's grace. This is the realm where Michael, a Seraphim and a messenger of God, resides, delivering God's messages of grace and love to humanity throughout the world. In the vault of the Pope Pius V Chapel at the Vatican, once called Saint Michael's Chapel, for example, Giorgio Vasari (1511-1574) metaphorically visualized these divine messages. He painted al fresco Michael The Archangel in combat against personifications of vices as demons who want to prevent human beings from the obtaining divine grace that will allow their souls to ascend toward divine love. 展开更多
关键词 saint Michael GIORGIO Vasari Neoplatonism Light and SYMBOLISM
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Evaluation of Access to Care for Patients with Chronic Kidney Disease Not on Dialysis in Saint-Louis Region (SENEGAL) 被引量:1
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作者 Seck Sidy Mohamed Doupa Dominique +5 位作者 Ndongo Modou Ahoui Seraphin Diop-Dia Amadou Dia Diatou Gueye Ngouampa Blaise Magloire Enguerran Macia 《Open Journal of Nephrology》 2020年第1期1-10,共10页
Introduction: Patients with chronic diseases, especially kidney diseases, frequently use the health care system and free dialysis policies are being implemented in many countries in Africa. This study aimed to evaluat... Introduction: Patients with chronic diseases, especially kidney diseases, frequently use the health care system and free dialysis policies are being implemented in many countries in Africa. This study aimed to evaluate access to care for patients with chronic kidney disease (CKD) in northern region of Saint-Louis. Methodology: In a cross-sectional survey, we included non-dialyzed CKD patients aged ≥20 years who attended outpatient nephrology clinic at University Hospital of Saint-Louis between January 1st and January 31st 2018. Access to care was measured using a questionnaire that integrated dimensions such as availability, geographic and financial accessibility, convenience, acceptability, effectiveness of care and quality of information. Socio-demographic and clinical data were also collected and analyzed with Epi Info 7. Results: Among 97 surveyed patients, 90 were included (response rate of 92.8%). Patients’ mean age was 35.2 years (20 - 89 years) and 55% were male. Only 30% of patients had health coverage either by the government, or private insurance or community health insurance. Access to care was rated as globally low by 73% of participants. However, we noticed some variations according to dimensions of access. Geographical accessibility and convenience of delivered care were good for the majority of patients, while financial access and acceptability of care were considered as very limited. Bivariate analysis showed that acceptability and effectiveness of care were linked to CKD stage while the quality of patients’ information was correlated with their educational level. Furthermore, health coverage was also associated with financial accessibility of care but not with its availability. Conclusion: This study showed that access to care is poor for majority of patients with CKD in Saint-Louis. Identification of the main barriers will help define appropriate strategies to achieve universal access to quality renal care. 展开更多
关键词 Access to CARE CHRONIC KIDNEY DISEASE saint-Louis
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Barbara Longhi’s Saint Agnes of Rome:Iconic Images of Purity and Virtue 被引量:1
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作者 Liana De Girolami Cheney 《Cultural and Religious Studies》 2022年第3期115-136,共22页
Barbara Longhi of Ravenna(1552-1638)enjoyed creating small devotional paintings depicting holy saints,in particular Saint Agnes(c.291-304).This saint’s life and martyrdom was recorded by the Bishop of Milan,Saint Amb... Barbara Longhi of Ravenna(1552-1638)enjoyed creating small devotional paintings depicting holy saints,in particular Saint Agnes(c.291-304).This saint’s life and martyrdom was recorded by the Bishop of Milan,Saint Ambrose(339-397),a Doctor of the Church and theologian,in his book Concerning Virgins(374)and by Jacobus de Voragine,the Archbishop of Genoa,in his Golden Legend(Legenda Aurea,1275).The saint’s story continues to be imaged and recounted to the present day because she is an icon of a pure and virtuous adolescent female.Barbara Longhi,along with her father,Luca Longhi(1507-1580),painted several versions of Saint Agnes.In their many depictions they composed two types of images:a single-solo-image of the saint;and her presence in a group of saints-a theme known as holy conversation.In her paintings of Saint Agnes,however,Barbara Longhi preferred to depict the solo image of the saint as virgo,a young maiden of virtue.This essay is composed of two parts:(1)an account of the life and martyrdom of Saint Agnes;and(2)an iconographical interpretation of Barbara Longhi’s Saint Agnes of Rome. 展开更多
关键词 Barbara and Luca Longhi saint Agnes virgo Christian symbolism MANNERISM Counter-Reformation Movement Pre-Raphaelite Movement
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Iranian Medical Staff’s Perception of the <i>All Saints</i>TV S
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作者 Arsia Taghva Masoud Azizi +1 位作者 Mohammad Reza Hatami Vahid Donyavi 《Open Journal of Psychiatry》 2015年第3期267-277,共11页
The present study was an attempt to explore the Iranian medical staff’s perception of the All Saints TV series. 199 participants including doctors, nurses, interns, and paramedics took part in this survey study which... The present study was an attempt to explore the Iranian medical staff’s perception of the All Saints TV series. 199 participants including doctors, nurses, interns, and paramedics took part in this survey study which was done in 2011. A 17-item Likert scale questionnaire was developed by the team of researchers to gather further evidence on the issues raised by the participants in the focus group which was formed in order to delve into their thoughts, attitudes, and feelings about the mentioned program. The supportive and non-blaming nature of the working relationship among the treatment team, their respect for the patients, their strong team work, the accuracy and precision of the presented medical information, and the discipline and sense of responsibility on the part of the medical staff were among the most frequent issues being mentioned and noticed by the participants. In addition, the majority of the participants considered the demonstrated model for providing healthcare services to be an efficient one;however, they believed that it was not possible to apply that model in the Iranian hospitals mainly due to the cultural differences between the two contexts and the current regulations in Iran. The participants were also observed to be only moderately satisfied with the system they were working in. It seems that healthcare systems in the developed countries can be used as models to identify the problems with the existing healthcare system in Iran. Authorities need to take appropriate measures to resolve such problems. The possible solutions and actions have been suggested in the present article. 展开更多
关键词 ALL saintS TV Series IRANIAN Medical Staff Perceptions
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Transcatheter Aortic Valve Implantation: Experience of Sainte Clotilde Hospital in Reunion Island
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作者 Adam Ahamat Ali Christophe Pouillot Geoffrey Rambaud 《World Journal of Cardiovascular Diseases》 2019年第10期772-780,共9页
Introduction: Degenerative aortic stenosis is the most common valvulopathy in developed countries. The implantation of a percutaneous aortic valve (TAVI) has taken an important place in the management of this valvulop... Introduction: Degenerative aortic stenosis is the most common valvulopathy in developed countries. The implantation of a percutaneous aortic valve (TAVI) has taken an important place in the management of this valvulopathy. The objective of this work is to report the results of patients treated by TAVI by the team of Sainte Clotilde Hospital (Reunion Island). Patients and?Methods: This was a descriptive retrospective study conducted from 01/10/2014?to 01/10/ 2017 in the Sainte Clotilde Hospital, Reunion Island. All patients who received TAVI for degenerative aortic stenosis were included in the study. Follow-up was completed until 31/08/19. Results: Forty-six (46) patients were included (sex ratio 0.53). The age was 82 (±7.5). Respectively,?56.5%, 21.7% and 6.5% of patients were diabetic [n = 26 (56.5%)], severe renal impairment [n = 10 (21.7%)] and hemodialysis [n = 3 (6.5%)]. All procedures were performed by femoral route under consious sedation. Edwards’ prostheses were used more often (93%), 100% Sapien 3, 6% of which were size 23. The primary success rate was 97.8% and the failure rate was 2% (deaths per procedure). The TAVI range of 0.66 ± 0.14 and 46.8 ± 15.5 against 1.48 ± 4.3 and 13.8 ± 5 in post TAVI. Severe pulmonary arterial?hypertension (>60 mmHg) was observed in 21.7% of pre-TAVI patients?compared to 4% in post TAVI patients. The overall rate of complications was 17% (n = 8). They were related to conductive disorders [6.5% (n = 3)], paraprosthetic leakage [2% (n = 1)], tamponade [2% (n = 1)], and hemorrhagic complications [6.5% (n = 3)]. Mean follow-up was 946 days (median = 1007.5 days), mean follow-up death rate was 30.4% (n = 14). The causes of death were non-cardiac in 57% (n = 8) of the cases. Conclusion: The TAVI results of the Sainte Clotilde Hospital Clinic are comparable to those observed in the literature. 展开更多
关键词 CALCIFIED AORTIC STENOSIS PERCUTANEOUS Valve Replacement sainte Clotilde HOSPITAL REUNION Island
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阿奎那(Aquinas,Saint Thomas,约1225—1274)意大利神学家(Theologian,Italy)
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《光谱实验室》 CAS CSCD 2007年第1期5-5,共1页
阿奎那1240年进入那波利大学,以后在1244年加入多明我会(天主教派别之一),他的家庭对此竭力反对而将他软禁起来。他于1245年逃往巴黎,在阿尔伯特大师骷指导下学习。以后,他开始写关于亚里士多德^A17的评论并赢得极大声誉。他在意... 阿奎那1240年进入那波利大学,以后在1244年加入多明我会(天主教派别之一),他的家庭对此竭力反对而将他软禁起来。他于1245年逃往巴黎,在阿尔伯特大师骷指导下学习。以后,他开始写关于亚里士多德^A17的评论并赢得极大声誉。他在意大利及法国各地教书,但他拒绝接受高的职位,包括那波利大主教职位。他成功建立了一种使亚里士多德哲学和天主教神学相协调的混合思想体系。 展开更多
关键词 意大利 saint 神学 亚里士多德 思想体系 天主教 学习
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The archaeogenomic validation of Saint Ladislaus'relic provides insights into theárpád dynasty's genealogy
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作者 Gergely I.B.Varga Lilla Alida Kristóf +11 位作者 Kitti Maár Luca Kis Oszkár Schütz Orsolya Váradi Bence Kovács Alexandra Gînguță Balázs Tihanyi Péter L.Nagy Zoltán Maróti Emil Nyerki Tibor Török Endre Neparáczki 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2023年第1期58-61,共4页
The house of Arp ad ruled Hungary for more than four centuries,establishing dynastical relationships with numerous European nobleand ruling houses,and giving many Catholic saints and blesseds to the Catholic Church.Th... The house of Arp ad ruled Hungary for more than four centuries,establishing dynastical relationships with numerous European nobleand ruling houses,and giving many Catholic saints and blesseds to the Catholic Church.They were one of the significant dynasties of Medieval Europe(Krist o and Makk,1996).The knight-king Saint Ladislaus I(c.1040-1095,reign:1077-1095)is one of the most outstanding kings of this dynasty.In addition to the hand relic(the Holy Right)of King Saint Stephanus I(c.975-1038,reign:1000/1001-1038),the skull relic in the Saint Ladislaus’Herma(Fig.1A-1C)preserved in the Cathedral of Gy or,is one of the most important relics for Hungarians(Klaniczai,2000). 展开更多
关键词 relic provides insights into the The archaeogenomic validation of saint Ladislaus d dynasty’s genealogy
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THE SAINT-VENANT PROBLEM OF PLANE BAR UNDER AN AXIAL FORCE
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作者 黄民丰 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1997年第5期511-515,共5页
In the paper, the solution of Saint-Venant problem is obtained through assumption of principal stress curves by means of the equilibrium equations which were deduced in paper [1]. The results show that the speed of sh... In the paper, the solution of Saint-Venant problem is obtained through assumption of principal stress curves by means of the equilibrium equations which were deduced in paper [1]. The results show that the speed of shear approaching to zero is a(3)/y(3) and axial stress approaching to constant is a(2)/y(2). 展开更多
关键词 ELASTICITY plane problem saint-Venant theory principal stress
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Saint-Venant torsion analysis of bars with rectangular cross-section and effective coating layers
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作者 H.TEIMOORI R.T.FAAL R.DAS 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2016年第2期237-252,共16页
This paper investigates the torsion analysis of coated bars with a rectangular cross-section. Two opposite faces of a bar are coated by two isotropie layers with different materials of the original substrate that are ... This paper investigates the torsion analysis of coated bars with a rectangular cross-section. Two opposite faces of a bar are coated by two isotropie layers with different materials of the original substrate that are perfectly bonded to the bar. With the Saint- Venant torsion theory, the governing equation of the problem in terms of the warping function is established and solved using the finite Fourier cosine transform. The state of stress on the cross-section, warping of the cross-section, and torsional rigidity of the bar are evaluated. Effects of thickness of the coating layers and material properties on these quantities are investigated. A set of graphs are provided that can be used to determine the coating thicknesses and material properties so as to keep the maximum von Mises stress on the cross-section below an allowable value for effective use of the coating layer. 展开更多
关键词 saint-Venant torsion rectangular cross-section coating layer torsional rigidity
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