Bibliografie tematiche / Service life (Engineering)

Letteratura scientifica selezionata sul tema "Service life (Engineering)"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 5 marzo 2023

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Indice

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Service life (Engineering)".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Articoli di riviste sul tema "Service life (Engineering)"

1

DODERO, JUAN MANUEL, ERNIE GHIGLIONE e JORGE TORRES. "ENGINEERING THE LIFE-CYCLE OF SEMANTIC SERVICES-ENHANCED LEARNING SYSTEMS". International Journal of Software Engineering and Knowledge Engineering 20, n. 04 (giugno 2010): 499–519. http://dx.doi.org/10.1142/s0218194010004852.

Testo completo
Abstract (sommario):
Service-oriented learning environments are the new paradigm for interoperability of learning management systems. They support a wider range of needs by integrating existing and emergent services, leading to an entirely new architectural design for such systems. The engineering life-cycle of resources and services can be enhanced and integrated in current and future virtual learning environments. This work defines a services-enhanced learning architecture and describes two levels of integration carried out to author, deploy and enact learning services from open web-based interaction protocols and semantic web service descriptions.
Gli stili APA, Harvard, Vancouver, ISO e altri
2

(Gray)Byrd, L. G. "Service Life and Life of Service: The Maintenance Commitments". Transportation Research Record: Journal of the Transportation Research Board 1650, n. 1 (gennaio 1998): 5–9. http://dx.doi.org/10.3141/1650-01.

Testo completo
Abstract (sommario):
The magnitude of today’s highway maintenance challenge, the impact of research on maintenance, basic objectives that should drive a maintenance program, and the progress made in meeting them over the last 4 decades are discussed. Highway maintenance should include the objectives of providing a consistently safe, comfortable, and efficient travel way for highway users and a safe environment for maintenance crews; providing optimum service life; maintaining as-built capacity and reliability; inviting, supporting, and using research and innovation; and performing with professionalism, competence, and diligence. Some of the challenges in meeting these objectives today are accelerating rates of deterioration, limited time available to work, complex interchanges and crowded rights-of-way, environmental restrictions, a litigious society, and public skepticism about all government functions. Three categories of responses are technologies, policies, and professionalism. A significant array of new, innovative tools and other products of research are making maintenance technology more effective. Maintenance managers need to be activists in promoting progressive policies in providing as-built capacity while performing maintenance and repair work and in procuring products and services. Maintenance policies should include recognition of user costs, use of performance specifications, fabrication of off-site repair components, design of repairable highway systems, use of corrosion-resistant materials, privatization of segments of the maintenance program, and establishment of an international maintenance technology reference program. Individual professionals must embrace continuing education, environmental sensitivity, community service, research and development, innovative management, and societal and political responsibilities.
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Camera, Fernanda, John Ahmet Erkoyuncu e Steve Wilding. "Service Data Quality Management Framework to Enable Through-life Engineering Services". Procedia Manufacturing 49 (2020): 206–10. http://dx.doi.org/10.1016/j.promfg.2020.07.020.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Harrison, H. W. "Estimating Service Life". Batiment International, Building Research and Practice 13, n. 1 (gennaio 1985): 37–41. http://dx.doi.org/10.1080/09613218508551240.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Masters, Larry W. "Service life prediction". Batiment International, Building Research and Practice 15, n. 1-6 (gennaio 1987): 292–96. http://dx.doi.org/10.1080/09613218708726837.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Linins, Oskars, Ernests Jansons, Armands Leitans, Irina Boiko e Janis Lungevics. "Estimation of Service Life of Mechanical Engineering Components". Key Engineering Materials 799 (aprile 2019): 71–76. http://dx.doi.org/10.4028/www.scientific.net/kem.799.71.

Testo completo
Abstract (sommario):
The paper is aimed to the methodology for estimation of service life of mechanical engineering components in the case of elastic-plastic contact of surfaces. Well-known calculation methods depending on physics, theory of probability, the analysis of friction pair’ shape and fit include a number of parameters that are difficult or even impossible to be technologically controlled in the manufacturing of mechanical engineering components. The new approach for wear rate estimation using surface texture parameters as well as physical-mechanical properties and geometric parameters of components is proposed. The theoretical part of the calculations is based on the 3D surface texture principles, the basics of material fatigue theory, the theory of elasticity and the contact mechanics of surfaces. It is possible to calculate the service time of the machine, but the process of running-in of the components is relatively short (less than 5%), therefore, the service time is mainly determined by a normal operating period, which also was used to evaluate this period. The calculated input parameters are technologically and metrologically available and new method for calculating the service time can be used in the design process of the equipment. The results of approbation of the method for estimation service time of mechanical engineering, which prove the applicability of mentioned method, are offered as well.
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Masood, Tariq, Johannes Egger e Maximilian Kern. "Future-proofing the Through-life Engineering Service Systems". Procedia Manufacturing 16 (2018): 179–86. http://dx.doi.org/10.1016/j.promfg.2018.10.162.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

He, Y., C. Li, T. Zhang, J. Liu, C. Gao, B. Hou e L. Wu. "Service fatigue life and service calendar life limits of aircraft structure: aircraft structural life envelope". Aeronautical Journal 120, n. 1233 (19 settembre 2016): 1746–62. http://dx.doi.org/10.1017/aer.2016.93.

Testo completo
Abstract (sommario):
ABSTRACTThe service life of aircraft structure includes the fatigue life and calendar life. The Aircraft Structural Life Envelop (ASLE) is a safe and reliable life scope of aircraft structures in service. The specific steps to establish the ASLE are developed, and a residual life prediction method for aircraft structure under service environments is established by combining the ASLE with the Miner theory. Furthermore, a service life extension method of aircraft structure is proposed based on a scope extension of the ASLE, including methods based on reliability analysis and structural repair. Finally, an application example of the ASLE is presented.
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Zhang, Yufeng, e Lihong Zhang. "Organizing complex engineering operations throughout the lifecycle". Journal of Service Management 25, n. 5 (14 ottobre 2014): 580–602. http://dx.doi.org/10.1108/josm-07-2013-0182.

Testo completo
Abstract (sommario):
Purpose – Strategic trends towards service operations have been widely reported in the recent literature, but organisational capabilities to support such service-centred strategies are less well understood. The purpose of this paper is to identify key organisational issues in managing complex engineering service operations throughout the lifecycle. Design/methodology/approach – Using instruments developed from the product lifecycle management technologies and the network configuration concept, key organisational issues for engineering service operations were identified through case studies focusing on complex engineering products and services systems across a variety of industrial sectors. Findings – The case studies demonstrated different organisational features and strategic priorities of engineering service operations along the whole lifecycle. A generic trend has been observed for engineering systems to move from being design, development and manufacturing focused to embracing support and end-of-life recycling matters. Originality/value – This paper provides an overall framework for integrating key organisational issues in engineering service operations. It contributes to the service literature by highlighting the need of developing appropriate organisational capabilities to support service-centred strategies with engineering cases. It also provides guidance for companies to manage their engineering network operations throughout the whole lifecycle of complex products and services systems.
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Aljawarneh, Shadi. "Cloud Security Engineering". International Journal of Cloud Applications and Computing 1, n. 2 (aprile 2011): 64–70. http://dx.doi.org/10.4018/ijcac.2011040105.

Testo completo
Abstract (sommario):
Information security is a key challenge in the Cloud because the data will be virtualized across different host machines, hosted on the Web. Cloud provides a channel to the service or platform in which it operates. However, the owners of data will be worried because their data and software are not under their control. In addition, the data owner may not recognize where data is geographically located at any particular time. So there is still a question mark over how data will be more secure if the owner does not control its data and software. Indeed, due to shortage of control over the Cloud infrastructure, use of ad-hoc security tools is not sufficient to protect the data in the Cloud; this paper discusses this security. Furthermore, a vision and strategy is proposed to mitigate or avoid the security threats in the Cloud. This broad vision is based on software engineering principles to secure the Cloud applications and services. In this vision, security is built into all phases of Service Development Life Cycle (SDLC), Platform Development Life Cycle (PDLC) or Infrastructure Development Life Cycle (IDLC).
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Tesi sul tema "Service life (Engineering)"

1

Balla, Chaitanya Kumar. "Prediction of Remaining Service Life of Pavements". University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1279316853.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Garcia-Ruiz, Johnnatan A. "Service Life Assessment of Culverts in Ohio". Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1470833987.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Mahmoodian, Mojtaba. "Reliability analysis and service life prediction of pipelines". Thesis, University of Greenwich, 2013. http://gala.gre.ac.uk/11374/.

Testo completo
Abstract (sommario):
Pipelines are extensively used engineering structures for conveying of fluid from one place to another. Most of the time, pipelines are placed underground, surcharged by soil weight and traffic loads. Corrosion of pipe material is the most common form of pipeline deterioration and should be considered in both the strength and serviceability analysis of pipes. The study in this research focuses on two different types of buried pipes including concrete pipes in sewage systems (concrete sewers) and cast iron water pipes used in water distribution systems. This research firstly investigates how to involve the effect of corrosion as a time dependent process of deterioration in the structural and failure analysis of these two types of pipes. Then two probabilistic time dependent reliability analysis methods including first passage probability theory and the gamma distributed degradation model are developed and applied for service life prediction of the pipes. The obtained results are verified by using Monte Carlo simulation technique. Sensitivity analysis is also performed to identify the most important parameters that affect pipe failure. For each type of the pipelines both individual failure mode and multi failure mode assessment are considered. The factors that affect and control the process of deterioration and their effects on the remaining service life are studied in a quantitative manner. The reliability analysis methods which have been developed in this research, contribute as rational tools for decision makers with regard to strengthening and rehabilitation of existing pipelines. The results can be used to obtain a cost-effective strategy for the management of the pipeline system. The output of this research is a methodology that will help infrastructure managers and design professionals to predict service life of pipeline systems and to optimize materials selection and design parameters for designing pipelines with longer service life.
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Custer, Nicholas C. "Ash impacts on gasoline particulate filter performance and service life". Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100142.

Testo completo
Abstract (sommario):
Thesis: S.M. in Mechanical Engineering, and S.M in Naval Architecture and Marine Engineering, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 71-74).
New regulations in the United States and Europe, designed to address climate change concerns by reducing greenhouse gas emissions, are causing increased use of gasoline direct-injection (GDI) engines in light-duty vehicles (LDV). Separate new regulations that aim to reduce particulate emissions to address air pollution concerns are taking effect concurrent with greenhouse gas limitations in both jurisdictions. GDI engines are proven to create more particulate emissions than previously utilized port-injection technology. Increasing particulate emissions rates combined with falling regulatory particulate emissions limits requires new strategies to reduce these emissions from gasoline powered LDVs. Particulate filters have been successfully implemented to reduce particulate emissions from diesel engine exhaust for over a decade. Diesel particulate filters have a demonstrated filtration efficiency of 95% or greater and have reduced diesel particulate mass (PM) emissions by one to two orders of magnitude. GDI engines require no more than one order of magnitude reduction in particulate emissions to meet new regulations. Existing particulate filter technology in use in diesel vehicles is capable of reducing GDI engine emissions to new regulatory levels; however, it is proposed that these reduction may be achievable through means other than gasoline particulate filters (GPF). A GPF will create an additional back-pressure in the engine exhaust system that will reduce engine power and efficiency. This backpressure will increase as PM is trapped in the filter and decrease as combustible PM removed. A buildup of incombustible ash present in engine-out PM will increase the baseline backpressure of the filter during the course of its service life. It is important to understand the impact of ash on the filter pressure drop performance before implementing GPF to meet new emissions regulations. This study builds on existing diesel particulate filter technology and demonstrates through experimental results the mechanisms by which ash increases GPF pressure drop. Ash deposits are also shown to increase the light-off temperature of three-way catalyst coatings in GPF.
by Nicholas C. Custer.
S.M. in Mechanical Engineering, and S.M in Naval Architecture and Marine Engineering
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Sohawon, Haris. "Service life extension of reinforced concrete structures using hydrophobic impregnation". Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29806.

Testo completo
Abstract (sommario):
Over the last few decades, the increasing premature deterioration of reinforced concrete structures, mainly due to rebar corrosion, has become a worldwide concern. This has been attributed to insufficient quality and quantity of cover concrete resulting from inadequate mix design and poor onsite workmanship respectively. Engineers also often lack understanding of concrete durability and prescribe insufficient cover depths relative to the exposure conditions. Concrete degradation has many financial and social implications on a larger scale. Direct costs relate to the repair and rehabilitation of existing structures to maintain serviceability while indirect costs include loss in productivity and reduced economic growth. With increasing demand for infrastructure and subsequent expansion of the built environment, there is greater need for concrete to withstand and perform in corrosive environments. Hence, designing for durability has gained significant importance amongst engineers and other stakeholders in the construction industry. Furthermore, the appearance of cracks can be considered as an inevitable phenomenon in the design life of reinforced concrete structures, due to concrete being an inherently cracked material. The presence of cracks within the cover zone changes the dynamics of transport mechanisms and corrosion development. Cracks provide preferential ingress paths for deleterious species such as chlorides and this leads to a reduction in the time taken for reinforcement corrosion initiation and thus reduces the service life of the structure. Most service life models also consider concrete only in the uncracked state, leading to an overestimation of the actual performance and design life of reinforced concrete infrastructure. Extensive research has been carried out to find means to promote the service life of reinforced concrete structures in aggressive environments. Hydrophobic (silane) impregnation represents a cost-effective way to increase the durability of concrete structures in cases where insufficient cover quality and depth have been achieved. The hydrophobic impregnation agent lines the internal capillary pore structure and provides a water-repellent surface without affecting the external appearance of the concrete. Thus, the risk of reinforcement corrosion and subsequent deterioration can be reduced as the ingress of water-dissolved aggressive species is minimised or prevented. The influence of silane impregnation on chloride ingress is well documented in literature and several experiments have been carried out over the last decades. However, there is limited work on the service life modelling of silane treated concrete. Hence, the purpose of this study was to investigate and quantify the influence of silane impregnation as a remedial measure for poor quality cover or insufficient cover depth in newly constructed structures and ultimately predict the time to corrosion initiation for specific cover depths and concrete types. The effectiveness of silane impregnation in cracked concrete was also studied. Two w/b ratios (w/b = 0.45 and w/b = 0.60) and four binder types (CEM I 52.5N, Fly-ash (FA), Ground granulated Corex slag (GGCS) and CEM III/B 42.5N) were selected. Hence, a total of 8 main (normal) concrete mixes and 4 poor quality mixes were used. Poor quality concrete was produced by exposing the concrete specimens to relatively high temperature at early age. Cracked concrete was obtained by loading notched reinforced beams until the formation of cracks. Steel spacers were then placed in the notch and the beams were unloaded to create crack widths of 0.2 mm and 0.6 mm (below and above the commonly assumed crack width threshold of 0.4 mm). Silane treatment was performed at a specimen age of 28 days by applying Sikagard®-706 Thixo at a consumption rate of 400 g/m2 . Several experimental tests were performed on untreated and silane treated concrete. Compressive strength and Durability Index (DI) tests were carried out to characterise the concrete mixes. Accelerated carbonation and moisture profiling tests were undertaken to assess the influence of silane impregnation on concrete carbonation and relative humidity. Finally, uncracked and cracked (untreated and treated) concrete mixes were ponded in sodium chloride (NaCl) solution for 80 days, followed by chloride profiling. The data for the uncracked concrete was curve fitted using a solution to Fick’s second law of diffusion. The regression parameters obtained (surface chloride concentration (Cs) and apparent chloride diffusion coefficient (Da)) were then incorporated in a mathematical solution to Fick’s second law to obtain suitable expressions that describe the penetration of chlorides with time for silane treated and untreated concrete mixes. Hence by determining the time taken for chloride concentration at the rebar level to reach the critical threshold (assumed to be 0.4% by mass of binder), the time to corrosion initiation of untreated and silane treated concrete was predicted for particular cover depths. The results indicate that the silane penetration depth is highly dependent on the quality (porosity) and moisture content of the near surface zone as deeper penetration was recorded in the higher w/b ratio and poor-quality concrete mixes. Silane impregnation also reduced the capillary absorption and chloride conductivity for all the mixes. In terms of the bulk diffusion test, chloride ingress in the treated concrete mixes was suppressed and lower chloride surface concentration (Cs) and apparent chloride diffusion coefficient (Da) were recorded. The influence of silane impregnation on carbonation was negligible in the w/b = 0.45 concrete mixes while a slight decrease in carbonation depth was observed in the w/b = 0.60 concrete mixes. The relative humidity of treated concrete (near the surface) initially increased relative to the untreated concrete. However, the difference in relative humidity between silane-treated and untreated concrete is reduced with time. Higher chloride concentrations were measured in the cracked concrete at depths of 50-60 mm compared to the uncracked concrete. Greater chloride ingress was also recorded in the 0.6 mm crack width relative to the 0.2 mm crack width. For a particular crack width, chloride ingress in cracked concrete was influenced by the type of binder; a significant reduction in chloride content was recorded in the cracked slag (GGCS and CEM III/B) concrete mixes relative to the CEM I mix. The results also suggest that silane impregnation reduces chloride ingress in cracked concrete (up to a crack with of 0.6 mm) and consequently minimises the risk of premature reinforcement corrosion initiation, especially in slag concrete. The service life prediction results emphasized the importance of adequate cover depths in the extreme marine exposure class (XS3) and highlighted the superior performance of slag concrete relative to CEM I concrete. A lower rate of chloride ingress was predicted in the silane treated concrete and consequently to achieve the same time to corrosion initiation, smaller cover depths are required. Alternatively, the results also show that the initiation period of rebar corrosion in structures with insufficient cover depth and quality can be effectively extended using silane impregnation.
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Maleki, Elaheh. "A Systems Engineering-based semantic model to support “Product-Service System” life cycle". Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0064/document.

Testo completo
Abstract (sommario):
Les Systèmes Produit-Service (PSS) résultent d'une intégration de composants hétérogènes couvrant à la fois des aspects matériels et immatériels (mécanique, électrique,logiciel, processus, organisation, etc.). Le processus de développement d’un PSS est fortement collaboratif impliquant des acteurs métier très variés.Ce caractère interdisciplinaire nécessite des référentiels sémantiques standardisés pour gérer la multitude des points de vue métier et faciliter l’intégration de tous les composants hétérogènes dans un système unique. Ceci est encore plus complexe dans le cas des PSS personnalisables, majoritaires dans le milieu industriel. Malgré les nombreuses méthodologies dans littérature, la gestion des processus de développement du PSS reste encore limitée face à cette complexité. Dans ce contexte, l'Ingénierie des systèmes (IS) pourrait être une solution avantageuse au regard de ses qualités bien prouvé pour la modélisation et la gestion de systèmes complexes. Cette thèse vise à explorer le potentiel d'utilisation de l'Ingénierie des systèmes (IS) comme fondement conceptuel pour représenter d’une façon intégrée tous les différents points de vue métier associés au cycle de vie du PSS. Dans ce cadre, un méta-modèle de PSS est proposé et exemplifié dans des cas industriels. Un modèle ontologique est aussi présenté comme une application d’une partie des modèles pour structurer le référentiel commun de la plateforme ICP4Life
Product-service systems (PSS) result from the integration of heterogeneous components covering both tangible and intangible aspects(mechanical, electrical, software, process, organization, etc.). The process of developing PSS is highly collaborative involving a wide variety of stakeholders. This interdisciplinary nature requires standardized semantic repositories to handle the multitude of business views and facilitate the integration of all heterogeneous components into a single system. This is even more complex in the case of customizable PSS in the industrial sector. Despite the many methodologies in literature, the management of the development processes of the PSS is still limited to face this complexity. In this context, Systems Engineering (SE) could bean advantageous solution in terms of its proven qualities for the modeling and management of complex systems. This thesis aims at exploring the potentials of Systems Engineering (SE) as a conceptual foundation to represent various different business perspectives associated with the life cycle of the PSS. In this context, a meta-model for PSS is proposed and verified in industrial cases. An ontological model is also presented as an application of a part of the model to structure the common repository of the ICP4Life platform
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Rahman, A. B. M. Mostafizur. "Assessment of Bridge Service Life Using Wireless Sensor Network". Youngstown State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1340424183.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Yu, Jianxiong. "Pavement Service Life Estimation And Condition Prediction". See Full Text at OhioLINK ETD Center (Requires Adobe Acrobat Reader for viewing), 2005. http://www.ohiolink.edu/etd/view.cgi?toledo1132896646.

Testo completo
Abstract (sommario):
Dissertation (Ph.D.)--University of Toledo, 2005.
Typescript. "A dissertation [submitted] as partial fulfillment of the requirements of the Doctor of Philosophy degree in Engineering." Bibliography: leaves 69-74.
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Ali, Muhammad Shafqat. "Enhancement of service life of prestressed concrete bridge girders using FRP composites". Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123187.

Testo completo
Abstract (sommario):
This research aims at enhancing the service life of the prestressed concrete bridge girders, using fiber-reinforced polymer (FRP) composite shell on the lower flange to impede the ingress of deleterious elements into the concrete. The FRP shell would help to retard the resulting deterioration reactions and achieve more durable bridges for a considerably increased service life. The behavior of prestressed concrete bridge girders with FRP shells on the tension flange was investigated experimentally.The flexural characteristics of FRP shell and concrete interface along with the effect of the steel reinforcement ratio were studied experimentally. This FRP shell was bonded around the lower part of the concrete beams, constructed with four different reinforcement ratios. The beam specimens with the FRP shell showed a significant enhancement in their strength, stiffness and energy absorption capacities, as compared with the associated control beams. The flexural behavior of cast-in-place prestressed concrete beams with FRP shell was studied to examine the contribution of the bonded FRP shell to the strength, stiffness, ductility and energy absorption capacity of prestressed concrete beam specimens, for five different levels of prestressing. The initial cracking, yield and ultimate strengths of the beam specimens with FRP shell were significantly higher than those of the associated control beam specimens. The FRP shell and the prestressing force enhanced the strength and stiffness of the beams. The long-term durability of the FRP shell to act as a barrier against ingress of aggressive elements, such as moisture and chlorides into the proposed FRP shell-concrete system, was examined experimentally in a preliminary manner. Detailed tests on concrete specimens reinforced externally with FRP shells subjected to accelerated moisture and salt solution at control temperatures were performed. In addition, scanning electron microscopy (SEM) was used to determine the effects caused by aging, with time, temperature and chloride injection pressure. The FRP shell, acting as a barrier, showed a significant resistance against chloride ingress by significantly slowing down the chlorides ingress rate and the total amount of chlorides. For a prestressed concrete girder with an FRP shell, the accumulated time for chloride penetration and reaching the level of prestressing steel strands was predicted to be more than 135 years. These results suggest that the FRP shell is quite effective in improving the durability characteristics of prestressed concrete girders and can significantly extend their service life.
Cette recherche vise à améliorer la durée de vie des poutres de pont en béton précontraint à l'aide de coquilles de composite de polymères renforcés de fibres (FRP) appliquées à la semelle inférieure pour empêcher l'infiltration d'éléments nocifs dans le béton. La coque en FRP permettrait de retarder les réactions de détérioration et de réaliser des ponts plus durables ayant une durée de vie considérablement accrue. Le comportement de ces poutres de a été étudié expérimentalement. Les caractéristiques en flexion de la coquille en FRP et de son interface de béton ainsi que de l'effet du pourcentage d'armature d'acier ont été étudiés expérimentalement. La coquille en FRP a été collée autour de la partie inférieure de poutres béton construites avec quatre pourcentages d'armature. Les spécimens de poutres avec la coquille de FRP ont montré une amélioration significative dans leurs résistances, rigidités et capacités d'absorption d'énergie par rapport aux poutres sans coquilles. Le comportement en flexion de poutres de béton précontraint coulées en place avec la coquille de FRP a été étudié afin d'examiner la contribution de la coquille à la résistance, rigidité, ductilité et capacité d'absorption d'énergie pour cinq pourcentages de précontraintes. La limite de fissuration, la limite d'élasticité et la limite ultime des spécimens avec FRP étaient sensiblement supérieures à ceux des spécimens sans coquille. La coquille en FRP et la force de précontrainte a amélioré la résistance et la rigidité des poutres. La contribution à la durabilité à long terme de la coquille de FRP contre les infiltrations d'éléments agressifs dans la coquille et le béton, tels que l'humidité et les chlorures, a été étudiée expérimentalement de façon préliminaire. Des tests accélérés sur des échantillons de béton renforcés extérieurement avec des coquilles de FRP ont été effectuées en les soumettant à l'humidité et une solution saline à température contrôlées. La microscopie électronique (SEM) a aussi été utilisée pour déterminer les effets du vieillissement par rapport au temps d'exposition, à la pression d'injection, à la température et aux chlorures. La coquille de FRP, agissant comme une barrière, a augmenté significativement la résistance contre la pénétration des chlorures en réduisant significativement le taux de pénétration des chlorures et de la quantité totale d'ions chlorure. Pour une poutre en béton précontraint avec une coque en FRP, le temps total pour que les ions chlorure atteignent les câbles d'acier de précontrainte est estimé à 135 ans. Ces résultats suggèrent que la coquille de FRP est très efficace pour améliorer la longévité des poutres en béton précontraints et peut allonger considérablement leur durée de vie.
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Thorsell, Thomas I. "Vacuum insulation in buildings : means to prolog service life". Licentiate thesis, KTH, Civil and Architectural Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4149.

Testo completo
Abstract (sommario):

Vacuum insulation panels, VIPs, constitute a new insulation material, 6 to 8 times better than traditional insulation materials, which utilizes the positive influence vacuum has on the thermal properties of certain materials. A VIP is a composite with a flat core enclosed by an envelope preventing the core to fill with gas. The vacuum in the core is vital to reach thermal conductivities down to 0,0035 W/(m K), if the vacuum is lost the panel has reached the end of its service life time. Metal sheets would the preferred material to create an impermeable envelope but would creates a large thermal bridge at the edges of a panel when it folds over the edges of the panel.

A serpentine edge has been proposed in order to deal with this large thermal bridge. This serpentine edge has been evaluated first as a numeric model in software and then by measuring on a prototype edge element in a hot and cold plate instrument. Measured temperatures were used to validate the numerical model. Results show that a serpentine edge can greatly reduce the thermal bridge if designed correctly.

Another direction taken in the development of the VIP barrier is to use very thin metal layers, metallization layer or coating, incorporated into multi layered polymer composite film. This creates barrier films with very good barrier properties and only small thermal bridges. The modeling of gas flux through films with more than one coating has only just started. Existing models for flux through multi coated films all assume that flux is only taking place through defects in the coating layers, that all defects are of the same size and that all defects are positioned in square lattices. The model discussed herein use the same assumption of flux through pinholes only but it does take defect sizes and positions into account. Barrier film, from a regular vacuum insulation panel, with double coatings has been evaluated in light microscopy to characterize the defects in each of the coatings. The data found have been fed into the model and the results comply well with reported permeabilities of similar barrier films.

Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Libri sul tema "Service life (Engineering)"

1

Martin, Jonathan W. Service Life Prediction of Polymeric Materials: Global Perspectives. Boston, MA: Springer US, 2009.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Service life estimation and extension of civil engineering structures. Oxford: Woodhead Publishing, 2011.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Anna, Hart, e Swartz Oretha D, a cura di. Service etiquette. 5a ed. Annapolis, Md: Naval Institute Press, 2009.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

1949-, Bauer David R., e Martin Jonathan W, a cura di. Service life prediction of organic coatings: A systems approach. Washington, DC: American Chemical Society, 1999.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Fishman, Kenneth L. LRFD metal loss and service-life strength reduction factors for metal-reinforced systems. Washington, D.C: Transportation Research Board, 2011.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

N, Parkins Redvers, e National Association of Corrosion Engineers., a cura di. Life prediction of corrodible structures. Houston, TX: NACE International, 1994.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Martin, Jonathan W. Methodologies for predicting the service lives of coating systems. Gaithersburg, MD: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1994.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

J, Solin, e Valtion teknillinen tutkimuskeskus, a cura di. Plant life management: Progress for structural integrity. Espoo, Finland: VTT, 2003.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

J, Solin, e Valtion teknillinen tutkimuskeskus, a cura di. Plant life management: Midterm status of a R & D project. Espoo, Finland: VTT, 2001.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

author, Xie Liyang 1962, a cura di. Ji xie shi bian ke kao xing li lun yu fang fa. Beijing: Ke xue chu ban she, 2012.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Capitoli di libri sul tema "Service life (Engineering)"

1

Charrett, Donald. "Design life or service life". In Contracts for Construction and Engineering Projects, 77–94. 2a ed. London: Informa Law from Routledge, 2021. http://dx.doi.org/10.4324/9781003206897-8.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Wang, W., e M. J. Carr. "Component Level Replacements: Estimating Remaining Useful Life". In Complex Engineering Service Systems, 297–314. London: Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-189-9_16.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Fu, Ming Wang. "Die Design and Service Life Analysis". In Engineering Materials and Processes, 95–130. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46464-0_4.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Wittern, Erik, e Robin Fischer. "A Life-Cycle Model for Software Service Engineering". In Service-Oriented and Cloud Computing, 164–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40651-5_13.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Tasker, Paul, Andy Shaw, Ben Sheridan e Sarah Kelly. "TES Service Innovation and the Role of Standards". In Through-life Engineering Services, 359–71. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-12111-6_21.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Gromadova, Monika. "Service Life of the Cam Mechanisms". In Lecture Notes in Civil Engineering, 243–55. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9121-1_19.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Hingorani, Ramon, e Peter Tanner. "Application of risk analysis in structural engineering – gas explosions". In Advances in Modeling Concrete Service Life, 65–78. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2703-8_7.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Rozenfeld, Henrique, Maiara Rosa, Sânia da Costa Fernandes, Marina de Pádua Pieroni, Carolina Queiroz Souza, Érica Gonçalves Rezende e Cristina Targas Gurian. "Product-Service Systems (PSS)". In Life Cycle Engineering and Management of Products, 205–33. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78044-9_9.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Lingegård, Sofia, e Mattias Lindahl. "Identification of Risks Related to Integrated Product Service Offerings of Rail Infrastructure: A Swedish Case". In Through-life Engineering Services, 323–40. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-12111-6_19.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

He, Yu Ting, Hong Peng Li, Feng Li e Chao Hua Fan. "Study on the Service Life of Electronic Equipment". In Key Engineering Materials, 2896–99. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.2896.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "Service life (Engineering)"

1

Suhardi, Novianto Budi Kurniawan e Jaka Sembiring. "Service computing system engineering life cycle". In 2017 4th International Conference on Electrical Engineering, Computer Science and Informatics (EECSI). IEEE, 2017. http://dx.doi.org/10.1109/eecsi.2017.8239136.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Jensen, Jakob Laigaar, Lars Jensen, Matias Valenzuela e Raul Vasquez. "Service Life Performance Design of Chacao Bridge". In IABSE Symposium, Vancouver 2017: Engineering the Future. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2017. http://dx.doi.org/10.2749/vancouver.2017.2816.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Franke, Dominik, Corinna Elsemann e Stefan Kowalewski. "Reverse Engineering and Testing Service Life Cycles of Mobile Platforms". In 2012 23rd International Workshop on Database and Expert Systems Applications (DEXA). IEEE, 2012. http://dx.doi.org/10.1109/dexa.2012.40.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Gao Na, Zhao Songzheng e Liu Jing. "Research service design based on product life cycle for service-oriented manufacturing". In 2010 2nd International Conference on Information Science and Engineering (ICISE). IEEE, 2010. http://dx.doi.org/10.1109/icise.2010.5691675.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

De Luca, Antonio, Zhi Zhang e Liling Cao. "Service Life Prediction of Concrete Parking Structures: Case Studies". In Ninth Congress on Forensic Engineering. Reston, VA: American Society of Civil Engineers, 2022. http://dx.doi.org/10.1061/9780784484548.020.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Savage, M. "Parabolic Log-Log Fatigue Life Model". In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/rsafp-14470.

Testo completo
Abstract (sommario):
Abstract A rapid method for determining service fatigue strength data is to test the product or device at an elevated load. Load-life relationships for engineering materials normally show a large reduction in life for a small increase in load. Unfortunately, there is little agreement on the exact nature of this load-life relationship. Some sources show a linear semi-log relationship. Some show a single linear log-log relationship. And some show a two-line log-log relationship with the shallower slope line active after ten-million load cycles or more. The two-line relationship agrees more closely with expected behavior. It predicts a difference between the load-life characteristics in the field at moderate service loads and the load-life characteristics in the laboratory with high test loads. However, the determination of the location and slope of the second, shallow, high-life line is an expensive proposition. In this paper, a parabolic log-log load-life model which predicts a gradual transition from the short-life testing environment to the long-life use environment is presented and compared to the two linear models. Fitting the model to test data is described as is the use of the model in planning tests for failure prevention prediction.
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Tatum, Nathan, Sven Rodenbeck e Robert C. Williams. "Engineering for Life: A History of the Public Health Service Engineers". In Third National Congress on Civil Engineering History and Heritage. Reston, VA: American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40594(265)45.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Trunov, N. B., V. S. Popadchuk, S. E. Davidenko e R. Ju Zhukov. "Actual Problems of VVER SG Tubing Service Life Management". In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75096.

Testo completo
Abstract (sommario):
Reliable operation of steam generator heat exchanging tubes is the major problem for NPPs of different types. The paper deals with current approaches to horizontal steam generator tubes inspection and plugging and the actual problems of service life management. The causes and laws of tubing corrosion degradation are considered using the information - analytical system. The results of SG prototype corrosion tests are presented. A possibility of corrosion degradation process management is demonstrated. The experimental verification was made to prove the possibility of flaws initiation under standby modes. The methodology of the plugging criteria choosing and the proposals on their optimization are given. The studies are provided for pressure loading of the tubes with real flaws. The recommendations are given for improving of SG operation.
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Xu, Xun, e Shi-zhong Qiang. "Damage Safety Assessment and Service Life Prediction of Bridges". In First International Conference on Transportation Engineering. Reston, VA: American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40932(246)365.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Tanimoto, Shigeaki, Ken Takahashi, Taro Yabuki, Kazuhiko Kato, Motoi Iwashita, Hiroyuki Sato e Atsushi Kanai. "Risk assessment quantification in life log service". In 2014 15th IEEE/ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD). IEEE, 2014. http://dx.doi.org/10.1109/snpd.2014.6888723.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Rapporti di organizzazioni sul tema "Service life (Engineering)"

1

Morkun, Volodymyr S., Сергій Олексійович Семеріков e Svitlana M. Hryshchenko. Use of the system Moodle in the formation of ecological competence of future engineers with the use of geoinformation technologies. Видавництво “CSITA”, 2016. http://dx.doi.org/10.31812/0564/718.

Testo completo
Abstract (sommario):
At present the information and communication technologies in education can be a catalyst in solving important social problems connected with increasing the educational resources and services availability and quality, real and equal opportunities in getting education for citizens despite their residence, social status and income. One of the most important education tasks is to develop students’ active cognitive attitude to knowledge. Cognitive activity in universities is a necessary stage in preparing for further professional life. The solution of task of formation of ecological competence of mining profile engineer requires the reasonable selection of the means of information and communication technologies conducing formation of ecological competence. Pressing task is constructive and research approach to preparation of future engineers to performance of professional duties in order to make them capable to develop engineering projects independently and exercise control competently. The relevance of the material covered in the article, due to the need to ensure the effectiveness of the educational process in the preparation of the future Mining Engineers. We analyze the source with problems of formation of ecological competence. The article focuses mainly general-purpose computer system support learning Moodle, which allows you to organize individual and collective work of students to master the specialized course teaching material used in teaching special course "Environmental Geoinformatics" in the implementation of educational research.
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Simon, James E., Uri M. Peiper, Gaines Miles, A. Hetzroni, Amos Mizrach e Denys J. Charles. Electronic Sensing of Fruit Ripeness Based on Volatile Gas Emissions. United States Department of Agriculture, ottobre 1994. http://dx.doi.org/10.32747/1994.7568762.bard.

Testo completo
Abstract (sommario):
An electronic sensory system for the evaluation of headspace volatiles was developed to determine fruit ripeness and quality. Two prototype systems were designed, constructed, and later modified. The first is an improved version of our original prototype electronic sniffer using a single head sensing unit for use as a single or paired unit placed on an individual fruit surface for applications in the field, lab, or industry. The second electronic sniffer utilizes a matrix of gas sensors, each selected for differential sensitivity to a range of volatile compounds. This system is more sophisticated as it uses multiple gas sensors, but was found to enhance the ability of the sniffer to classify fruit ripeness and quality relative to a single gas sensor. This second sniffer was designed and constructed for the sampling of fresh-cut or whole packs of fruits such as packaged strawberries and blueberries, and can serve as a prototype for research or commercial applications. Results demonstrate that electronic sensing of fruit ripeness based on aromatic volatile gas emissions can be used successfully with fresh frits. Aroma sensing was successful for classifying ripeness in muskmelons, including different cultivars, apples, blueberries, strawberries, and in a complimentary BARD project on tomatoes. This system compared favorably to the physicochemical measurements traditionally employed to assess fruit maturity. This nondestructive sensory system can detect the presence of physically damaged fruits and shows excellent application for use in quality assessment. Electronic sensors of the tin oxide type were evaluated for specificity toward a wide range of volatiles associated with fruit ripeness. Sensors were identified that detected a broad range of alcohols, aldehydes, esters, hydrocarbons, and volatile sulfur compounds, as well as individual volatiles associated with fruit ripening across a wide concentration range. Sensors are not compound specific, thus, the matrix of sensors coupled with discrimination analysis provides a fingerprint to identify the presence of compounds and to assess alterations in fresh products due to alterations in volatile emissions. Engineering developments led to the development of a system to compensate for temperature and relative humidity relative to on-line aroma sensing with melons for ripeness determination and to reduce response time, thus permitting the electronic sniffer to be used for monitoring both fresh and processed food products. The sniffer provides a fast, reliable and nondestructive tool to assess fruit ripeness and quality. We hope that our work will foster the introduction and utilization of this emerging technology into the agricultural and horticultural
Gli stili APA, Harvard, Vancouver, ISO e altri
Ti possono interessare anche gli elenchi estesi di opere sul tema "Service life (Engineering)":
Articoli di riviste Tesi Libri
Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!

Vai alla bibliografia