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Author: P. Davis Publisher: IWA Publishing ISBN: 9781843392071 Category : Science Languages : en Pages : 0
Book Description
International experience indicates that PE often exhibits the lowest failure rate of all materials in use. Many failures are due to third-party damage or poor joint preparation rather than failure under normal service loading conditions. While low failure rates should also be expected in the United States, there is insufficient historical data to extrapolate future failure rates. This project develops models to predict the long term performance prediction for PE pipes in the United States. The objectives of this study were to (1) review the current field performance for polyethylene (PE) water pipelines; (2) review U.S. and international standards for PE water pipes; (3) review previous and state-of-the-art test methods and modeling techniques for service lifetime prediction of PE pipelines; (4) identify and measure relevant pipe properties that govern long-term field performance; and (5) develop and benchmark models to predict long-term field performance of PE pipes. The experimental findings from this project demonstrate that the fracture performance of currently available PE materials is significantly improved from previous material grades. This indicates that the future performance of these current PE materials should not be assessed based on previous historical data held by water utilities. The simple equations provided from the physical probabilistic failure model in this study provide water utilities with a basis for estimating future failure rates. This information can be combined with knowledge of cost consequences of pipe failure and used to inform future asset management decisions, such as replacement planning and budget setting.
Author: P. Davis Publisher: IWA Publishing ISBN: 9781843392071 Category : Science Languages : en Pages : 0
Book Description
International experience indicates that PE often exhibits the lowest failure rate of all materials in use. Many failures are due to third-party damage or poor joint preparation rather than failure under normal service loading conditions. While low failure rates should also be expected in the United States, there is insufficient historical data to extrapolate future failure rates. This project develops models to predict the long term performance prediction for PE pipes in the United States. The objectives of this study were to (1) review the current field performance for polyethylene (PE) water pipelines; (2) review U.S. and international standards for PE water pipes; (3) review previous and state-of-the-art test methods and modeling techniques for service lifetime prediction of PE pipelines; (4) identify and measure relevant pipe properties that govern long-term field performance; and (5) develop and benchmark models to predict long-term field performance of PE pipes. The experimental findings from this project demonstrate that the fracture performance of currently available PE materials is significantly improved from previous material grades. This indicates that the future performance of these current PE materials should not be assessed based on previous historical data held by water utilities. The simple equations provided from the physical probabilistic failure model in this study provide water utilities with a basis for estimating future failure rates. This information can be combined with knowledge of cost consequences of pipe failure and used to inform future asset management decisions, such as replacement planning and budget setting.
Author: University Paul Davis Publisher: ISBN: 9789781583216 Category : Languages : en Pages : 0
Book Description
In Europe, Polyethylene (PE) pipes have been used for water transportation since the 1950s and In Australia since the late 1970s, with low failure rates. In North America, PE has been used for water supply since the late 1980s and only on a small scale. To assess the current field performance of PE water pipes, historical failure data was requested from a total of 87 water utilities from the Australia, the UK and the US. While actual failure data was supplied in some cases, the majority of information supplied was anecdotal. Details of this study are reported and discussed. Several areas are identified for future development of the Monte Carlo simulation model: Inherent Defect Size, Loading Conditions, and Generic Failure Rate vs. Age Curves.
Author: Jonathan W Martin Publisher: Springer Science & Business Media ISBN: 0387848762 Category : Science Languages : en Pages : 530
Book Description
Service Life Prediction of Polymeric Materials: Global Perspectives combines developed content derived from topics discussed in the Fourth International Symposium on Service Life Prediction (Key Largo, Florida, December 2006). This critical examination of the existing and alternative methodologies used to assess the service life of polymeric materials presents readers with the advances in accelerated and field exposure testing protocols. Written by established experts in the service life community, this volume introduces advanced methods, including high throughput and combinatorial analyses, models data collection and storage formats. Researchers and engineers involved with materials and polymer science, coatings technologists and automotive materials will find Service Life Prediction of Polymeric Materials: Global Perspectives a useful tool.
Author: T. Stafford Publisher: iSmithers Rapra Publishing ISBN: 9781859571385 Category : Technology & Engineering Languages : en Pages : 162
Book Description
In this report the developmental history, an overview of the current plastic pipe market and some of the practical problems encountered in laying new pipelines are covered initially. The author explains the design considerations involved in a new pipeline, he details fluid flow, safe pressure containment, the life expectancy of the system, how and where it is to be laid, what level of damage tolerance is acceptable as well as some of the specifications and test methods used within plastic pipe design. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.
Author: John Moalli Publisher: William Andrew ISBN: 081551865X Category : Technology & Engineering Languages : en Pages : 351
Book Description
This book contains analysis of reasons that cause products to fail. General methods of product failure evaluation give powerful tools in product improvement. Such methods, discussed in the book, include practical risk analysis, failure mode and effect analysis, preliminary hazard analysis, progressive failure analysis, fault tree analysis, mean time between failures, Wohler curves, finite element analysis, cohesive zone model, crack propagation kinetics, time-temperature collectives, quantitative characterization of fatigue damage, and fracture maps. Methods of failure analysis are critical to for material improvement and they are broadly discussed in this book. Fractography of plastics is relatively a new field which has many commonalities with fractography of metals. Here various aspects of fractography of plastics and metals are compared and contrasted. Fractography application in studies of static and cycling loading of ABS is also discussed. Other methods include SEM, SAXS, FTIR, DSC, DMA, GC/MS, optical microscopy, fatigue behavior, multiaxial stress, residual stress analysis, punch resistance, creep-rupture, impact, oxidative induction time, craze testing, defect analysis, fracture toughness, activation energy of degradation.Many references are given in this book to real products and real cases of their failure. The products discussed include office equipment, automotive compressed fuel gas system, pipes, polymer blends, blow molded parts, layered, cross-ply and continuous fiber composites, printed circuits, electronic packages, hip implants, blown and multilayered films, construction materials, component housings, brake cups, composite pressure vessels, swamp coolers, electrical cables, plumbing fittings, medical devices, medical packaging, strapping tapes, balloons, marine coatings, thermal switches, pressure relief membranes, pharmaceutical products, window profiles, and bone cements.
Author: H. Jerry Qi Publisher: Springer ISBN: 3319069802 Category : Technology & Engineering Languages : en Pages : 193
Book Description
Challenges in Mechanics of Time-Dependent Materials, Volume 2: Proceedings of the 2014 Annual Conference on Experimental and Applied Mechanics, the second volume of eight from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Experimental Mechanics, including papers in the following general technical research areas: Metallic, Polymeric and Composite Materials o Effects of Extreme Environments including Radiation Resistance, Damage, and Aging o Challenges in Time-dependent Behavior Modeling of Low, Moderate and High Strain Rates o Effects of Inhomogeneities on the Time-Dependent Behavior o Time dependent granular materials · Composite, Hybrid and Multifunctional Materials o Challenges in Time-dependent Behavior Modeling Viscoelastoplasticity and Damage o Effects of Interfaces and Interphases on the Time-Dependent Behavior · Mechanics of materials from advanced manufacturing, such as additive manufacturing o Property characterization from AM o Process modeling and simulations of AM o Material design using AM · Time-dependent and Small-scale Effects in Micro/Nano-scale Testing
Author: P. Davis
Author: P. Davis
Author: University Paul Davis
Author: S. Canfer
Author: Francesca Cecinati
Author: Jonathan W Martin
Author: Naila Webb
Author: 
Author: T. Stafford
Author: John Moalli
Author: H. Jerry Qi