Relevant bibliographies by topics / Hydrostatic strength

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Hydrostatic strength'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Hydrostatic strength"

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Lebedev, V. L., V. Yu Kosulnikov, P. V. Sery, S. N. Troshkin, and A. V. Аnisimov. "Prediction of hydrostatic strength of spheroplastics." Voprosy Materialovedeniya, no. 4(108) (February 1, 2022): 149–64. http://dx.doi.org/10.22349/1994-6716-2021-108-4-149-164.

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In this work, calculations of the hydrostatic strength of a spheroplastic are carried out using the previously described empirical formula. The calculations were based on the physical and mechanical characteristics of the polymer binder and hollow glass microspheres. Measurements of the physical and mechanical characteristics of the polymer binder, hollow glass microspheres and spheroplastics were performed with standard methods: dynamic mechanical analysis (DMA), gas and hydrostatic pycnometers. The results of tensometric tests of Poisson’s ratios of binders were also used. The hydrostatic st
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Tamošiūnas, Tadas, and Šarūnas Skuodis. "Non-cohesive Soil Direct Shear Strength Affected with Hydrostatic Pressure." Mokslas - Lietuvos ateitis 9, no. 5 (2017): 520–23. http://dx.doi.org/10.3846/mla.2017.1078.

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This paper presents first results of non­cohesive soil direct shear tests with hydrostatic pressure. To reach this aim, it was chosen the Baltic Sea Klaipėda sand, due to granulometry composition and particles shape. According to this, investigated Baltic Sea sand can be called Lithuanian standard sand for scientific testing. Analysis of results revealed, that when it is increased hydrostatic pressure, the shearing strength is also increasing. Comparing air­ dry sand results with fully saturated sand and affected with 100 kPa of hydrostatic pressure, the angle of internal friction increased fo
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Wang, Rong, Xiu Rong Zhu, Zhi Wen Shao, et al. "Review on Hydrostatic Extrusion of Magnesium Alloys." Materials Science Forum 788 (April 2014): 115–21. http://dx.doi.org/10.4028/www.scientific.net/msf.788.115.

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Magnesium wrought alloys are of special interest for structural components owing to their improved microstructures and mechanical properties by comparison with Mg cast parts. However, the market of Mg wrought alloys is still relatively small and one of the most important limitations for their application in areas such as aviation and spaceflight is that their strength is still not high enough to be widely used. Currently, more and more attention are paid to hydrostatic extrusion of Mg alloys because the extruded Mg alloys which exhibit extremely fine grains and high strength can be easily obta
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Skuodis, Šarūnas, Gintaras Žaržojus, Tadas Tamošiūnas, and Neringa Dirgėlienė. "Reconstruction of Holocene marine sand natural hydrostatic pressure and its relation with shearing strength." Baltica 32, no. 2 (2019): 182–89. http://dx.doi.org/10.5200/baltica.2019.2.5.

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This research paper represents interpretation of engineering geological and geotechnical conditions by using a direct shear device with a possibility to apply hydrostatic pressure during the experimental testing. In the authors’ opinion, the evaluation of in-situ hydrostatic pressure and reconstruction of it in the laboratory tests is a very important step in the determination of the engineering geological and geotechnical properties of the sand strength and its behaviour. To understand the influence of hydrostatic pressure on shearing strength results, there were performed direct shear tests
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Yao, Guo Wen, Yan Jun Li, and Xiao Wei Feng. "Effect of High Pressure on Dynamic Compressive Strength of A95 Alumina Ceramics." Advanced Materials Research 446-449 (January 2012): 3643–46. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.3643.

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The dynamic strength expressions of materials were reviewed in case of one-dimensional strain shock loadings in this paper, the effects on the strength were suggested to be considered of hydrostatic pressure and high strain rate. A modified form for the Hugoniot Elastic Limits was given associated with the Drucker-Prager yield criterion, the effect of hydrostatic pressure being included. Free surface velocity histories of particle were measured by VISAR system in plate impact experiments on alumina with a Light Gas Gun. The experimental determination of dynamic strengths of alumina was discuss
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Lebedev, V. L., V. Yu Kosulnikov, P. V. Sery, and S. N. Troshkin. "Acoustic emission in hydrostatic strength tests of spheroplastics." Voprosy Materialovedeniya, no. 3(115) (October 14, 2023): 136–46. http://dx.doi.org/10.22349/1994-6716-2023-115-3-136-146.

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Registration of acoustic emission in the process of spheroplastics destruction in a high-pressure hydrostatic chamber is realized. Hardware design does not require specialized equipment and is based on available components. Time synchronization on pressure and acoustic emission graphs ensures pressure fixation of pressures at which the formation of cracks in the spheroplastic sample begins. It is shown that accumulation of destructions begins with pressure, smaller, than pressure fixed as short-term hydrostatic durability.
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Kotrechko, Sergiy, Oleksandr Ovsjannikov, Tatjana Mazilova, Igor Mikhailovskij, Evgenij Sadanov, and Nataliya Stetsenko. "Inherent hydrostatic tensile strength of tungsten nanocrystals." Philosophical Magazine 97, no. 12 (2017): 930–43. http://dx.doi.org/10.1080/14786435.2017.1285500.

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Wu, Bangbiao, Ling Yang, Yong Mei, Yunhou Sun, Jinming Liu, and Jun Shen. "Effects of Freeze–Thaw Cycling on Dynamic Compressive Strength and Energy Dissipation of Sandstone." Minerals 12, no. 10 (2022): 1331. http://dx.doi.org/10.3390/min12101331.

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In this study, the dynamic compressive strength and dissipated energy of rocks were investigated under hydrostatic pressure after different freeze–thaw cycles (FTCs). A split Hopkinson pressure bar (SHPB) with a lateral confining pressure chamber was used for the dynamic testing of sandstone specimens. The results indicated that under a certain loading rate and hydrostatic pressure, both the dissipative energy and dynamic compression strength of rocks decreased with the increase in the number of FTCs. The hydrostatic pressure significantly increased the dissipated energy and dynamic compressio
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Orłowska, Marta, Ewa Ura-Bińczyk, Lucjan Śnieżek, et al. "Increasing the Mechanical Strength and Corrosion Resistance of Aluminum Alloy 7075 via Hydrostatic Extrusion and Aging." Materials 15, no. 13 (2022): 4577. http://dx.doi.org/10.3390/ma15134577.

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The present study investigates the correlation between mechanical properties and resistance to corrosion of hydrostatically extruded aluminum alloy 7075. Supersaturated solid solutionized samples undergo a plastic deformation process, followed by both natural and artificial aging. Furthermore, two types of hydrostatic extrusion are applied to the samples: single-stepped and double-stepped. This process is shown to influence grain refinement and the precipitation process, resulting in changes in the electrochemical properties of the samples. Hydrostatic extrusion combined with aging is shown to
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Finn, Michael A., Nathan D. Faulkner, Scott J. Hetzel, and Paul A. Anderson. "Spinal duraplasty materials and hydrostasis: a biomechanical study." Journal of Neurosurgery: Spine 15, no. 4 (2011): 422–27. http://dx.doi.org/10.3171/2011.5.spine10851.

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Object Dural tears are a frequent complication of spinal surgery and contribute to significant morbidity. Occasionally, dural tears cannot be closed primarily and dural patch grafts must be utilized. No data exist on the comparative immediate hydrostatic strength of various patch materials used alone or with a biological adhesive in a spinal dural tear model. Thus, the authors conducted this study to determine the comparative effectiveness of various patch materials used with and without biological adhesive. Methods Twenty-four thoracic spines from calves were prepared with laminectomies and s
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Dissertations / Theses on the topic "Hydrostatic strength"

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Wu, Yang. "Experimental and numerical study on failure strength of aspirated cell membrane." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/6018.

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The objective of this work is to develop an innovative and quantitative method to study cell failure under fluidic pressure to understand cell membrane mechanical properties. Due to lack of experimental data related to cell failure property, the current research focuses on investigating the cell failure using a micro pipette aspiration experiment method to elaborate gradually increasing hydrostatic pressure to the cell causing the membrane to deform and eventually rupture. Based on our observation, the prostate cancer cells (PC-3) deformed into a deflated and flattened shape under higher hydro
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Limprasert, Tawan. "Behaviour of soil, soil-cement and soil-cement-fiber under multiaxial test." Ohio University / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1179260769.

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Sigley, R. H. "Failure mechanisms under complex loading of glass-reinforced polyester composites and their matrices : The effect of superposed hydrostatic pressures up to 300 MPa on axial tensile and compressive strengths, and in-plane shear properties of unidirectional." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234245.

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Беда, Олександр Іванович, Александр Иванович Беда, Oleksandr Ivanovych Beda, Віталій Іович Симоновський, Виталий Иович Симоновский та Vitalii Iovych Symonovskyi. "Аналіз впливу пружної сили на динаміку ротора". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40561.

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Нині існує велика кількість теоретичних та експериментальних досліджень впливу шпаринних ущільнень на динаміку ротора. Але в більшості із них розглядаються моделі так званих коротких ущільнень, в яких окружною складовою швидкості руху рідини, обумовленої полем тиску, нехтують. При використанні ж ущільнень, де окружна складова потоку порівнянна з осьовою або навіть перевищує її, динамічні характеристики ротора суттєво змінюються.
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Kalhor, Roozbeh. "Accelerated Testing Method to Estimate the Lifetime of Polyethylene Pipes." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/79944.

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The ability to quickly develop predictions of the time-to-failure under different loading levels allows designers to choose the best polymeric material for a specific application. Additionally, it helps material producers to design, manufacture, test, and modify a polymeric material more rapidly. In the case of polymeric pipes, previous studies have shown that there are two possible time-dependent failure mechanisms corresponding to ductile and brittle failure. The ductile mechanism is evident at shorter times-to-failure and results from the stretching of the amorphous region under loading and
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Staub, Déborah. "Étude du comportement mécanique à rupture des alumines de forte porosité : Application aux supports de catalyseurs d'hydrotraitement des résidus." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0089/document.

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La présente étude porte sur le comportement mécanique de deux types de supports de catalyseurs utilisés industriellement en hydrotraitement des résidus. Ces supports extrudés, fabriqués par IFPEN, sont constitués d’alumine de transition γ avec un taux de porosité proche de 70%. La porosité du premier matériau est uniquement constituée de mésopores (< 50 nm). La porosité du second matériau est constituée de mésopores et de macropores (jusqu’à 20 µm). Les niveaux de sollicitation en service étant très peu connus, cette étude s’attache à décrire de manière précise et exhaustive le comportement
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Tseng, Wen-Li, and 曾雯莉. "The Failure Strength and Patterns of Human Degenerated Intervertebral Disc in Resisting the Hydrostatic Pressure." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/38341412961618740302.

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碩士<br>國立臺灣大學<br>醫學工程學研究所<br>96<br>Objective： To evaluate the strength of hydrostatic pressure of endplate and the spreading pattern of contrast agent in the disc. Summary of Background Data： One of the disc degeneration therapies is to inject the biomaterials, which replace or promote regeneration of nucleus into the nucleus pulposus. To determine the efficacy of this therapy and the criteria of patient selection, it is important to evaluate the hydrostatic pressure strength of endplate and the injection pattern of contrast agent in the disc. Methods：Fifteen discs from 5 cadaver thoracic and
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Lin, Jimmy, and 林志明. "Ultimate Strength Analysis of Ring-Stiffened Circular Cylinders Under Hydrostatic Pressure-A Comparison of Experiment and Theory." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/08926528642450466281.

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碩士<br>國立成功大學<br>造船工程學系研究所<br>85<br>The structural behaviours of circular cylindrical shells are so complicated t hat their design could not depend on numerical or analytical method but on sem i-empirical method. The basic concept of the latter is that the ultimate stren gth of the circular cylindrical shells can be thought as linear elastic buckli ng loadsmultiplied by imperfection factor and plastic reduction factor which d erived fromexperimental datas. The collapse of cylinderical shellsunder hydros ti
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Books on the topic "Hydrostatic strength"

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Escudier, Marcel. Bernoulli’s equation. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198719878.003.0007.

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In this chapter Newton’s second law of motion is used to derive Euler’s equation for the flow of an inviscid fluid along a streamline. For a fluid of constant density ρ‎ Euler’s equation can be integrated to yield Bernoulli’s equation: p + ρ‎gz′ + ρ‎V2 = pT which shows that the sum of the static pressure p, the hydrostatic pressure ρ‎gz and the dynamic pressure ρ‎V2/2 is equal to the total pressure pT. The combination p + ρ‎V2/2 is an important quantity known as the stagnation pressure. Each of the terms on the left-hand side of Bernoulli’s equation can be regarded as representing different fo
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Tupper, E. C., and K. J. Rawson. Basic Ship Theory: Hydrostatics and Strength/Chapters 1 to 9 (Basic Ship Theory). 4th ed. Longman Pub Group, 1994.

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Book chapters on the topic "Hydrostatic strength"

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Gooch, Jan W. "Hydrostatic Strength." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_6147.

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Lee, Jong Il, Young Choi, Kwang Suck Boo, and Joon Hong Park. "A Study on Relationship between Hardness and Hydrostatic Stress." In Fracture and Strength of Solids VI. Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-989-x.619.

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Rout, Deepak Kumar, and Raghu V. Prakash. "Evaluation of Fatigue Strength of Alloy Steel Pipe Under Influence of Hydrostatic Pressure." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6002-1_9.

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Setiadi, B. Wicaksono, A. Riyadl, Bagus H. Jihad, and A. Apriyanto. "Analytical Calculation, Numerical and Hydrostatic Test as a Validation of Material Strength of the New RX-450 Rocket Motor Tube." In Proceedings of the 6th International Conference and Exhibition on Sustainable Energy and Advanced Materials. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4481-1_79.

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"Hydrostatic strength." In Encyclopedic Dictionary of Polymers. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_6053.

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"hydrostatic strength." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_82083.

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Lokoshchenko, A. M. "Bulging of a cylindrical shell under the effect of external hydrostatic pressure." In Creep and Long-Term Strength of Metals. CRC Press, 2017. http://dx.doi.org/10.1201/b22242-12.

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Brauns, J. "Strength analysis of buckled thin-walled composite cylindrical shell with hydrostatic loading." In Structural Failure and Plasticity. Elsevier, 2000. http://dx.doi.org/10.1016/b978-008043875-7/50218-5.

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Mate, C. Mathew, and Robert W. Carpick. "Lubrication." In Tribology on the Small Scale. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199609802.003.0009.

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For situations where high friction is not explicitly needed, lubricants are used to reduce friction and wear to acceptable levels. Lubricants function mainly by introducing a layer of solid or liquid material with low shear strength between two sliding surfaces. This chapter covers the basic regimes of lubrication: hydrostatic, hydrodynamic, elastohydrodynamic, mixed, and boundary. Viscosity is the most important physical parameter describing a lubricant, and it is thoroughly discussed in this chapter. Slippage of lubricants and other liquids against solid surfaces is also discussed. The chapt
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Reis R.M., Vilar O.M., and Azevedo R.F. "Stress-strain behavior of a residual soil profile from gneiss." In Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2009. https://doi.org/10.3233/978-1-60750-031-5-825.

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This paper deals with the stress-strain behavior of mature and young soils of a typical residual soil profile from gneiss, as found in Vi&amp;ccedil;osa - MG, Brazil. It is shown that the shear strength of saturated soil, both mature and young is independent of shearing direction. However, the visually more homogeneous mature soil showed to be more anisotropic, regarding the deformability, than the young residual soil that visually seems to be heterogeneous. The cohesion intercept tends to increase with soil suction according to a non linear relationship that can be adjusted through a hyperbol
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Conference papers on the topic "Hydrostatic strength"

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Festy, D., and D. Tigges. "Hydrogen Embrittlement of High Strength Low Alloy Steel, Cathodically Protected in Seawater : Effect of Hydrostatic Pressure." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92421.

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Abstract The exploration and exploitation of deep ocean resources are limited by material performance. In fact, the reliability of equipment is ensured by material resistance to seawater aggressivity. Thus, the use of metallic alloys in a deepsea environment demands study of their electrochemical and mechanical behaviour. A special high pressure tank has been designed to perform experiments on the effects of hydrostatic pressure upon metallic alloy corrosion and protection in a seawater environment, including mechanical behaviour. The test involved cracking of a CT specimen of a low alloyed hi
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Gao, Hongxiang, Junyi Wang, Kunfeng Wang, Anik Sengupta, and Eun Sok Kim. "Hydrostatic Strength and Resonant Frequency of Large and thin LPCVD SiN Diaphragm with Added Parylene." In 2025 IEEE 38th International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2025. https://doi.org/10.1109/mems61431.2025.10917679.

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Festy, D., and A. M. Beccaria. "Electrochemical Studies of High Strength Low Alloy Steel Corrosion and Cathodic Protection in Seawater: Effect of Hydrostatic Pressure." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92404.

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Abstract The exploration and exploitation of deep ocean resources are limited by material performance. The reliability of equipment is ensured by material resistance to seawater aggressivity. A special high pressure tank has been designed to perform experiments on the effects of hydrostatic pressure upon metallic alloy corrosion and protection in a seawater environment, including mechanical behaviour. Electrochemical investigations on corrosion and cathodic protection have been performed in natural seawater pressurized up to 30 MPa. Results of electrochemical investigations and chemical analys
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Brongers, M. P. H., J. A. Beavers, C. E. Jaske, and B. S. Delanty. "Effect of Hydrostatic Testing on Ductile Tearing of X-65 Line-Pipe Steel with Stress-Corrosion Cracks." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00355.

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Abstract Hydrostatic testing is one method to confirm the integrity of pipelines containing colonies of stress-corrosion cracks. Although this technique is widely used, a concern of the pipeline industry is the potential for ductile tearing damage of subcritical flaws. The objectives of the current study were to evaluate the influence of hydrostatic testing on the crack tip morphology and to determine the amount of ductile tearing that may occur for different hydrostatic testing conditions. Stress-corrosion cracks were grown in compact tension specimens of X- 65 line-pipe steel in a near-neutr
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Granderson, David. "Endurance Regression Testing Method to Obtain a Hydrostatic Design Basis for Fiberglass Pipe." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09208.

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Abstract After decades of use, it is becoming evident that the standard practice ASTM D2992 and referenced Standard test Method ASTM D1598 may not be producing the intended results.(1) 1 2 Like the current ASTM practices, the goal of “Endurance Regression testing” is to obtain the Hydrostatic Design Basis for “Fiberglass” (Glass Reinforced Thermosetting Resin Pipe, Fittings, and Joints). “Endurance Regression Testing” will similarly measure, plot, and extrapolate the long term hydrostatic strength (LTHS) of fiberglass components upon exposure to a controlled and constant set of aging condition
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Festy, Dominique. "Cathodic Protection of Steel in Deep Sea : Hydrogen Embrittlement Risk and Cathodic Protection Criteria." In CORROSION 2001. NACE International, 2001. https://doi.org/10.5006/c2001-01011.

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Abstract The exploitation of hydrocarbon reservoirs offshore West Africa will necessitate the application of cathodic protection to structures and equipment installed in deep waters. The design parameters given by the guidelines may need to be revised for projects offshore West Africa. Some results in the literature point out that hydrostatic pressure could have a detrimental effect both on hydrogen embrittlement and cathodic protection current demand. The present research programme aims to answer these questions. By using a specific high-pressure tank, which simulates deep-sea conditions, exp
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Mahajanam, Sudhakar, Efrain Garcia, and Ken Riggs. "Metallurgical Analysis of Hydrotested 20-Inch Natural Gas Pipeline." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16330.

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Abstract Hydrostatic testing of pipelines is critical during construction and maintenance. It is an important pre-commission test and destructive tool which validates the integrity of the pipeline prior to actual service with flammable fluids at high pressures. Hydrotesting provides the quality control needed to ensure that the required pipeline tensile strength is available to sustain the operating pressure, and that the welds and joints are defect free. In this paper, we discuss a recent case study wherein metallurgical analysis was performed at our lab on a 20-inch API 5L X65 carbon steel p
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Olsen, Stein, and S. M. Hesjevik. "Hydrogen Embrittlement from CP on Supermartensitic Stainless Steels – Recommendations for New Qualification Methods." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04546.

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Abstract Hydrogen Induced Stress Cracking is a well known failure mechanism for high strength materials that are cathodically protected. Recently there are reports on failures on supermartensitic and duplex stainless steels. Based on the general good field experience with these materials, it is necessary to focus on utilisation and the local design. Allowable strain and stress should be defined and special components should be given more attention in the design stage. The results from charging experiments show that there is an effect of the hydrostatic pressure and the electrolyte. Results fro
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Hals, Gry Lysaker. ""Rubber Materials for Corrosion and Thermal Insulation"." In CORROSION 2006. NACE International, 2006. https://doi.org/10.5006/c2006-06023.

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Abstract A rubber compound may be chemically resistant to most corrosive liquids, gases, salt water, and ozone and UV light. Where steel is exposed to corrosion, it can be protected with a rubber lining. Because of its elasticity and strength, rubber has extremely well wear resistance. Offshore installations producing oil and gas have a great need for protective coatings and linings in order to operate safely and continuously within the life of the fields (min. 25 years). Due to the possible risk of clogging of sub sea oil and gas piping by wax and hydrate formation, thermal insulation is nece
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Cameron, Kimberly, and Alfred M. Pettinger. "Effectiveness of Hydrostatic Testing for High Strength Pipe Material." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31426.

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Pipeline systems are typically subjected to hydrostatic testing to help ensure pipeline integrity. It can be desirable to use the highest feasible test pressure to eliminate as many defects as possible. It is widely accepted that safe control of yielding can be achieved during hydrostatic testing and that the hydrostatic testing does not create a stress state that is less safe from the standpoint of pre-existing flaws. For a small percentage of cases, however, hydrostatic testing can produce flaws that were longer than the ones removed. In these few cases, the flaws can then fail at a lower te
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Reports on the topic "Hydrostatic strength"

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Fish, Anatoly M., and Yuri K. Zaretsky. Ice Strength as a Function of Hydrostatic Pressure and Temperature. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada333030.

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Vankirk, George, Andreas Frank, Michael Roth, Brett Williams, and William Heard. Residual strength of a high-strength concrete subjected to triaxial prestress. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48055.

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This study investigates simplified mechanical loading paths that represent more complex loading paths observed during penetration using a triaxial chamber and a high-strength concrete. The objective was to determine the effects that stress-strain (load) paths have on the material’s unconfined compressive (UC) residual strength. The loading paths included hydrostatic compression (HC), uniaxial strain in compression (UX), and uniaxial strain load biaxial strain unload (UXBX). The experiments indicated that the load paths associated with nonvisible microstructural damage were HC and UX—which prod
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Bellemare, Simon. PR-610-163756-R01 Hardness Strength and Ductility (HSD) Testing of Line Pipes Initial Validation. Pipeline Research Council International, Inc. (PRCI), 2017. http://dx.doi.org/10.55274/r0011424.

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In-ditch nondestructive material verification for yield strength and toughness has been a growing interest to the pipeline industry in the continuous efforts to further raise pipeline safety and efficiency. It can complement or substitute alternate techniques such as material extraction or hydrostatic pressure tests. This work is the first use of the Hardness, Strength, and Ductility (HSD) Tester by PRCI to measure the equivalent of the API 5L yield strength from only testing the out-side diameter surface of pipe joints without significant material removal. The procedure explicitly account for
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Nessim. L51880 Influence of Higher Design Factor on Structural Integrity of X70 and X80 Pipelines. Pipeline Research Council International, Inc. (PRCI), 2001. http://dx.doi.org/10.55274/r0010372.

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Most pipelines in Class 1 areas are currently designed to a utilization factor of 0.72 using steel grades of up to X70. Using higher strength steels and/or a higher design factor can reduce the wall thickness and construction cost of such pipelines. High strength steels tend to have high yield-to-tensile ratios and lower overall post-yield tangent stiffness. This raises concerns about the potential for excessive plastic deformations under high hydrostatic test pressures. Combined with a high design factor, high steel grades will also lead to thinner pipe walls and reduced tolerance to thicknes
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Maxey and Eiber. L51562 A Study of the Yield-Tensile Ratio and Its Effect on Line Pipe Behavior. Pipeline Research Council International, Inc. (PRCI), 1988. http://dx.doi.org/10.55274/r0010069.

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Considerable research has been conducted to define the significance of the yield-to-tensile (Y/T) ratio for line-pipe steels. In the late 1960s and early 1970s, a study was completed in which a series of burst tests was conducted on 41 pipes ranging from 8 to 42 inches in diameter and representing API Specification 5L Grades A through X65. In this study, only 2 of the 41 materials studied had a yield-to-tensile ratio greater than 0.9, and these were artificially created. With the advent of the X70 and X80 steels, higher yield-to-tensile ratios have developed as the yield strength increased. A
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Rosenfeld and Munoz. PR-218-104503-R01 Field-Expanded Line Pipe Causes Effects on Pipeline Safety and Appropriate Responses. Pipeline Research Council International, Inc. (PRCI), 2012. http://dx.doi.org/10.55274/r0010785.

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Several pipeline construction projects executed between 2007 and 2009 experienced observations of pipe expansion following hydrostatic testing in the field to pressure levels produced hoop stresses near or above 100% SMYS. Owing to biaxial strength effects, the test conditions would not have been expected to cause pipe having the specified strength properties to yield during the test. The affected pipes were 36-inch OD and 42-inch OD, specified to meet the requirements of API 5L Grade X70 supplied by several manufacturers, with plate obtained from various sources. Some projects had only a few
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Brosnahan and DeVries. PR-317-10702-R01 Testing for the Dilation Strength of Salt. Pipeline Research Council International, Inc. (PRCI), 2011. http://dx.doi.org/10.55274/r0010026.

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A laboratory testing program on rock salt specimens was performed using test conditions that are consistent with the stresses that are experienced near the surfaces of salt caverns during storage operation. The proposed work effort focuses on improving the methodology for defining the onset of dilation for rock salt. Geomechanical studies use dilation criteria to assess the potential for salt damage that can lead to spalling in the cavern roof and/or walls and subsequent damage to the cavern or hanging string. This constraint is often the one that limits the minimum gas pressure in a natural g
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Leis and Zhu. PR-003-063526-R01 Leak vs Rupture Boundary for Pipes with a Focus on Low Toughness and-or Ductility. Pipeline Research Council International, Inc. (PRCI), 2012. http://dx.doi.org/10.55274/r0010781.

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While the technology to manage corrosion is largely mature, just one high-profile corrosion incident, like that at Carlsbad, NM, rekindles the public�s concern for safety, with far reaching effects possibly into Congress and the regulatory management. Such incidents also bring into question the viability of related integrity management tools and practices � particularly those used to assess incident consequences and prioritize related maintenance. Reliably discriminating between leaks and ruptures thus is important � but remains elusive for many applications. This project sought new understand
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L51496 Techniques for Locating Leaks During Hydrotests of Gas Transmission Pipelines. Pipeline Research Council International, Inc. (PRCI), 1985. http://dx.doi.org/10.55274/r0011234.

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Review of existing and proposed technologies for locating leaks during hydrostatic testing of buried gas transmission pipelines was performed. Articles, reports, and patents having information on leak location were catalogued. Potential technologies were evaluated for further development. Techniques which merit further attention include: 1) Injecting trace gas in the test water; 2) Searching for the maximum acoustic emission signal strength that corresponds to the leak site; 3) Ground radar for detection of water leaks; and 4) Modifying an instrumented pig used in sewer lines for gas pipeline
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