Procedia Engineering最新文献_第2页

The Barriers to Research and Innovation in Disaster Resilience in Higher Education Institutions in Asia 亚洲高等教育机构抗灾能力研究与创新的障碍

Procedia Engineering Pub Date : 2018-02-22 DOI: 10.1016/J.PROENG.2018.01.158

C. Liyanage, Renuka Thakore, Dilanthi Amartunga, A. Mustapha, R. Haigh

引用次数: 4

Fatigue of HNBR blends and the effects of thermal ageing HNBR共混物的疲劳及热老化效应

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/j.proeng.2018.02.017

Kubat Narynbek Ulu , Bertrand Huneau , Erwan Verron , Patrick Heuillet , Anne-Sophie Béranger

{"title":"Fatigue of HNBR blends and the effects of thermal ageing","authors":"Kubat Narynbek Ulu , Bertrand Huneau , Erwan Verron , Patrick Heuillet , Anne-Sophie Béranger","doi":"10.1016/j.proeng.2018.02.017","DOIUrl":"10.1016/j.proeng.2018.02.017","url":null,"abstract":"<div><p>HNBR (Hydrogenated Nitrile Butadiene Rubber) is a synthetic rubber with good resistance to heat and oil products; due its properties, HNBR is utilized in high-demanding applications in oil exploration, aerospace, automotive, and other industries. However, compared to other industrial rubbers, there are only few published studies on the fatigue behavior of HNBR. Moreover, it is important to understand how fatigue resistance is affected by the formulation of HNBR, specifically by the content of acrylonitrile (ACN) monomers and percentage of hydrogenation (number of saturated bonds). First, fatigue experiments are carried out for unaged samples at 120°C, which is the median operating temperature for these HNBR blends. Five HNBR blends are tested with various contents of acrylonitrile and various percentages of hydrogenation. Afterwards, testing is carried out one of the blend, i.e. HNBR with 36% ACN and 96% hydrogenation at 150°C for simultaneous ageing and fatigue conditions. For fatigue life experiments, the Wöhler curve is built according to a novel experimental approach of true stress control for four loading levels and R=0 loading ratio. Preliminary results with thermal ageing are subsequently presented.</p></div>","PeriodicalId":20470,"journal":{"name":"Procedia Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proeng.2018.02.017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73634687","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: 5

A Newly developed Mesoscopic Model on Simulating Pedestrian Flow 一种新的模拟行人流动的介观模型

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/j.proeng.2017.12.055

Meng Shi, Eric Wai Ming Lee, Yi Ma

{"title":"A Newly developed Mesoscopic Model on Simulating Pedestrian Flow","authors":"Meng Shi, Eric Wai Ming Lee, Yi Ma","doi":"10.1016/j.proeng.2017.12.055","DOIUrl":"10.1016/j.proeng.2017.12.055","url":null,"abstract":"<div><p>This paper presents a newly developed mesoscopic model with grid-based structure for building evacuation simulation. The evacuation space in this model is discretized into cells with larger size than that of the microscopic models. This mesoscopic model directly computes the density flow between the cells governed by the density flow algorithm. The computation speed is higher than the traditional cellular automata model in which the movements of all pedestrians should be tracked for calculating the crowd density. To test the feasibility of this model, we applied it to a typical scenario in which pedestrians evacuate from a square room with single exit and conducted parameter sensitivity study on the length of the time step δ. The simulation results show that, within a valid range, changing δ only has minor influence on the evacuation process. We can directly identify area with high density as bottleneck from dynamically changed density map even the relatively large time step is adopted. In addition, the commercial package AnyLogic was used to benchmark the performance of this model. The results show that the mesoscopic model discerns evacuation patterns in more details compared to the macroscopic models and with higher efficiently computational speed than the microscopic models.</p></div>","PeriodicalId":20470,"journal":{"name":"Procedia Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proeng.2017.12.055","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74090826","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: 4

Numerical Study of Smoke Spread upon Shaft-box Type Double Skin Facades 轴箱式双层蒙皮外立面烟气扩散的数值研究

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/j.proeng.2017.12.072

Rui-qi Wang , Shi-jia He , Huan-ran Yue

引用次数: 5

Challenges associated with integrating CCA and DRR in the UK: A review on the existing legal and policy background 在英国整合CCA和DRR的挑战:对现有法律和政策背景的回顾

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/J.PROENG.2018.01.126

N. Dias, D. Amaratunga, R. Haigh

引用次数: 14

Physical and Social Assessment of the Waterlogged Area and Suitability of the “Inclusive and Adaptive Tidal River Management Technique” to Alleviate Waterlogging in Southwest Bangladesh 孟加拉国西南部涝渍区物理和社会评价及“包容性和适应性潮汐河管理技术”缓解涝渍的适宜性

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/j.proeng.2018.01.098

A.S.M. Maksud Kamal , Abrar Hossain , B.M. Rabby Hossain , S.M. Kamrul Hassan , A.K.M. Mamunur Rashid

{"title":"Physical and Social Assessment of the Waterlogged Area and Suitability of the “Inclusive and Adaptive Tidal River Management Technique” to Alleviate Waterlogging in Southwest Bangladesh","authors":"A.S.M. Maksud Kamal , Abrar Hossain , B.M. Rabby Hossain , S.M. Kamrul Hassan , A.K.M. Mamunur Rashid","doi":"10.1016/j.proeng.2018.01.098","DOIUrl":"10.1016/j.proeng.2018.01.098","url":null,"abstract":"<div><p>Bangladesh has often been considered as the land of extremes in terms of natural processes. The statement is justified by the presence of world’s largest delta, one of the largest river systems carrying a huge amount of water and sediment discharge as well as prevalence of a number of natural hazards. These characteristics make the region very dynamic and sensitive to changes. Bangladesh is one of the most densely populated countries in the world and human development activities to accommodate the large population have caused major disruptions to the dynamics of the natural system. The study focuses on such a case where anthropogenic activities, such as polderization, dam construction etc. have disrupted the natural land building process and have caused persistent waterlogging in the southwest region of Bangladesh. The rivers in the region are naturally characterized by active deposition of sediment in riverbed causing reduced drainage capacity. Moreover, construction of coastal polders that de-linked the flood plains from the rivers, and diminished upstream flow during the dry season deteriorated the sedimentation problem in the region. The study delineates different hydrological parameters and characteristics of the deposited sediments along with identification of social vulnerabilities. The investigated hydrological and sedimentological characteristics refer to the existing sediment management as well as provide a framework for the future development works in the pre-identified TRM sites. Based on the findings, the suitability of Inclusive and Adaptive Tidal River Management (TRM++) technique was assessed.</p></div>","PeriodicalId":20470,"journal":{"name":"Procedia Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proeng.2018.01.098","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72940299","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: 2

A Study into the Role of International Collaborations in Higher Education to Enhance Research Capacity for Disaster Resilience 高等教育国际合作对提高灾害恢复能力的作用研究

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/J.PROENG.2018.01.159

D. Amaratunga, C. Liyanage, R. Haigh

引用次数: 5

Predicting failure in additively manufactured parts using X-ray computed tomography and simulation 使用x射线计算机断层扫描和模拟预测增材制造零件的失效

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/j.proeng.2018.02.008

Johannes Fieres , Philipp Schumann , Christof Reinhart

{"title":"Predicting failure in additively manufactured parts using X-ray computed tomography and simulation","authors":"Johannes Fieres , Philipp Schumann , Christof Reinhart","doi":"10.1016/j.proeng.2018.02.008","DOIUrl":"10.1016/j.proeng.2018.02.008","url":null,"abstract":"<div><p>In casting, molding, or additive manufacturing processes, there are some typical issues that can change the geometry of a part and cause porosity or other defects. With the aid of X-ray computed tomography (CT), internal discontinuities and geometry deviations can be accurately detected and visualized. However, the question remains in how far a given defect affects mechanical failure. We aim at bridging this gap by structural mechanics simulations based on CT images. In this study, we describe a method to predict the tensile strength and the location of crack initiation from the simulated stress distributions on the basis of local stress concentrations. We validate the method for tensile rods and real-life aeronautic parts which were additively manufactured from an AlSi10Mg aluminum alloy. Thirty-six specimens were manufactured in total, where different porosity patterns were deliberately inserted. The specimens were CT-scanned in high resolution. Structural mechanics simulations were carried out on basis of the CT images. An immersed-boundary finite elements code is used. The generation of a conforming simulation mesh is not required, making the code suitable especially for complex geometries like porous objects. The same test specimens were subjected to destructive physical tensile tests. We show that there is a very good correlation between the predicted and measured tensile strengths, and that the location of the first crack occurrence can be forecasted accurately.</p></div>","PeriodicalId":20470,"journal":{"name":"Procedia Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proeng.2018.02.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77346089","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: 31

Facile Synthesis of NaOH-modified Fishbone Charcoal (FBC) with Remarkable Adsorption towards Methylene Blue 对亚甲基蓝具有显著吸附性能的氢氧化钠改性鱼骨炭(FBC)的简易合成

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/j.proeng.2017.12.041

Wei Wang , Yan-yan Liu , Xian-feng Chen , Shao-xian Song

{"title":"Facile Synthesis of NaOH-modified Fishbone Charcoal (FBC) with Remarkable Adsorption towards Methylene Blue","authors":"Wei Wang , Yan-yan Liu , Xian-feng Chen , Shao-xian Song","doi":"10.1016/j.proeng.2017.12.041","DOIUrl":"10.1016/j.proeng.2017.12.041","url":null,"abstract":"<div><p>This study has demonstrated the preparation of NaOH-FBC and investigated its potential application as an adsorbent to remove MB from aqueous solution. Adsorption Experiments of MB removal were carried out based on the parameters of initial pH, initial MB concentration, temperature and contact time. Results showed that the specific surface area of the NaOH-FBC reached up to 61.13m<sup>2</sup>/g. The experimental adsorption data were analyzed with Langmuir and Freundlich isotherm models. The kinetic adsorption models were also studied. By fitting the Langmuir adsorption isotherm model, the q<sub>max</sub> of the NaOH-FBC was highly achieved as 605.82±9.09 mg/g, compared to 70.42±1.34 mg/g produced by the untreated FBC. The MB adsorption process using the untreated FBC was a non-spontaneous and endothermic process, which was well fitted with the pseudo-first-order kinetic model and Freundlich adsorption isotherm model. However, the MB adsorption process of the NaOH-FBC was a spontaneous and endothermic process, which was in accordance with the pseudo-second-order kinetic model and Freundlich adsorption isotherm model. Furthermore, with the increase of pH, temperature and contact time, the adsorption capacity of MB onto the FBC and NaOH-FBC were both increased. The adsorption results suggest the efficiency and potential of NaOH-FBC as a MB adsorbent.</p></div>","PeriodicalId":20470,"journal":{"name":"Procedia Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proeng.2017.12.041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77366493","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

An Experimental Investigation on the Effect of Wind Speed on Cotton Combustion 风速对棉花燃烧影响的实验研究

Procedia Engineering Pub Date : 2018-01-01 DOI: 10.1016/j.proeng.2017.12.076

Zhi-sheng Wang , Wan-fu Liu , Zhao-peng Ni , Lu Wang , Bo Gao

引用次数: 4