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Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "High strength Testing"

1

Price, W. F., and J. P. Hynes. "In-situ strength testing of high strength concrete." Magazine of Concrete Research 48, no. 176 (September 1996): 189–97. http://dx.doi.org/10.1680/macr.1996.48.176.189.

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2

Mikaelian, Karnig O. "Testing diamond strength at high pressure." Diamond and Related Materials 20, no. 10 (November 2011): 1340–43. http://dx.doi.org/10.1016/j.diamond.2011.09.005.

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3

Johnson, Claude D., and S. Ali Mirza. "Confined capping system for compressive strength testing of high performance concrete cylinders." Canadian Journal of Civil Engineering 22, no. 3 (June 1, 1995): 617–20. http://dx.doi.org/10.1139/l95-070.

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This paper presents a simple, inexpensive confined cap testing method which can be employed in the compressive strength testing of high performance concrete cylinders. An inexpensive customized cylinder capping apparatus and standard concrete laboratory testing equipment are employed. The paper describes the capping apparatus, capping and testing procedures, as well as test results for concrete compressive strengths up to and exceeding 100 MPa. Key words: capping, capping confinement, compressive strength, cylinders, end condition, grinding, high-strength concrete, specimen size, testing.
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4

Hooton, RD, M. Sonebi, and KH Khayat. "Testing Abrasion Resistance of High-Strength Concrete." Cement, Concrete and Aggregates 23, no. 1 (2001): 34. http://dx.doi.org/10.1520/cca10523j.

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5

Richardson, Gregory N., and John A. Bove. "Testing and monitoring of high strength geosynthetics." Geotextiles and Geomembranes 6, no. 1-3 (January 1987): 157–72. http://dx.doi.org/10.1016/0266-1144(87)90063-x.

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6

Affolter, Christian, Ulrich Müller, Christian Leinenbach, and Bernhard Weisse. "Compressive Testing of Ductile High-Strength Alloys." Journal of Testing and Evaluation 43, no. 6 (June 11, 2015): 20140301. http://dx.doi.org/10.1520/jte20140301.

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7

Mentl, Vaclav, and Josef Bystricky. "Compression Tests of High Strength Steels." Advanced Materials Research 59 (December 2008): 293–98. http://dx.doi.org/10.4028/www.scientific.net/amr.59.293.

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Mathematical modelling and virtual testing of components and structures represent a useful and economic tool for design and safety assessment. The basic mechanical properties which can be found in material standards are not relevant in cases where the real service conditions differ from those applied during standardised testing. Thus e.g. mechanical behaviour at higher strain rates can be interesting for the car components when the simulation of crash situations is used during structure development. The dynamic compression tests are usually performed by means of drop towers, by means of high speed hydraulic testing machines or Hopkinson bar method. At the Mechanical Testing Laboratory of the SKODA Research Inst. in Pilsen, Czech Republic, an instrumentation of Charpy pendulum testing machine was realised in order that it was possible to perfom dynamic compression tests, [1], and the compatibility of obtained results in comparison with traditional impact compression tests was verified within the round–robin carried out by TC5 ESIS Sub-Committee on “Mechanical Testing at Intermediate Strain Rates“, [2]. A new striking tup and load measurement system were designed and callibrated. At the same time, a new software was developed which makes it possible to evaluate the test force-deformation record. The goal of this study was 1. to check the possibility of compression testing of high strength materilas by mens of Charpy pendulum, and 2. to study the strain rate influence on basic mechanical properties.
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8

Sovová, Kateřina, Karel Mikulica, Adam Hubáček, and Karel Dvořák. "Behavior of High Strength Concrete at High Temperatures." Solid State Phenomena 276 (June 2018): 259–64. http://dx.doi.org/10.4028/www.scientific.net/ssp.276.259.

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Concrete is considered as a non-combustible building material. However, at High-Performance Concrete (HPC) is due to its dense structure more likely to occur in explosive spalling. This results in lost of load bearing capacity function of concrete. This paper deals with design, production and testing of the cement-based concrete with the use of different fibers (polypropylene fibers and cellulose fibers). It also assesses the influence of high temperature on strength, visual changes of specimens, changes of surface and degradation of testing specimens due to heat loads according to normative heat curve and also according to hydrocarbon curve.
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9

OCHIAI, Ikuo. "Manufacture and Testing of High Strength Steel Wires." Journal of the Japan Society for Technology of Plasticity 51, no. 593 (2010): 493–97. http://dx.doi.org/10.9773/sosei.51.493.

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10

Sucharda, O., V. Bilek, and P. Mateckova. "Testing and mechanical properties of high strength concrete." IOP Conference Series: Materials Science and Engineering 549 (June 18, 2019): 012012. http://dx.doi.org/10.1088/1757-899x/549/1/012012.

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Дисертації з теми "High strength Testing"

1

Mitchell, Andrew Douglass. "Shear friction behavior of high-strength concrete." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/19274.

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2

Roenker, Andrew T. "Testing of Torque-and-Angle High Strength Fasteners." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490701582262578.

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3

Yosefani, Anas. "Flexural Strength, Ductility, and Serviceability of Beams that Contain High-Strength Steel Reinforcement and High-Grade Concrete." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4402.

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Utilizing the higher capacity steel in design can provide additional advantages to the concrete construction industry including a reduction of congestion, improved concrete placement, reduction in the required reinforcement and cross sections which would lead to savings in materials, shipping, and placement costs. Using high-strength reinforcement is expected to impact the design provisions of ACI 318 code and other related codes. The Applied Technology Council (ATC-115) report "Roadmap for the Use of High-Strength Reinforcement in Reinforced Concrete Design" has identified key design issues that are affected by the use of high-strength reinforcement. Also, ACI ITG-6, "Design Guide for the Use of ASTM A1035 Grade 100 Steel Bars for Structural Concrete" and NCHRP Report 679, "Design of Concrete Structures Using High-Strength Steel Reinforcement" have made progress towards identifying how code provisions in ACI 318 and AASHTO could be changed to incorporate high-strength reinforcement. The current research aims to provide a closer investigation of the behavior of beams reinforced with high-strength steel bars (including ASTM A615 Grade 100 and ASTM A1035 Grades 100 and 120) and high-strength concrete up to 12000 psi. Focus of the research is on key design issues including: ductility, stiffness, deflection, and cracking. The research includes an extensive review of current literature, an analytical study and conforming experimental tests, and is directed to provide a number of recommendations and design guidelines for design of beams reinforced with high-strength concrete and high-strength steel. Topics investigated include: strain limits (tension-controlled and compression-controlled, and minimum strain in steel); possible change for strength reduction factor equation for transition zone (Φ); evaluation of the minimum reinforcement ratio (þmin); recommendations regarding limiting the maximum stress for the high-strength reinforcement; and prediction of deflection and crack width at service load levels. Moreover, this research includes long-term deflection test of a beam made with high grade concrete and high-strength steel under sustained load for twelve months to evaluate the creep deflection and to insure the appropriateness of the current ACI 318 time-dependent factor, λ, which does not consider the yield strength of reinforcement and the concrete grade.
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4

Dabbagh, Hooshang Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Strength and ductility of high-strength concrete shear walls under reversed cyclic loading." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2005. http://handle.unsw.edu.au/1959.4/27467.

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This study concerns the strength and behaviour of low-rise shear walls made from high-strength concrete under reversed cyclic loading. The response of such walls is often strongly governed by the shear effects leading to the shear induced or brittle failure. The brittle nature of high-strength concrete poses further difficulties in obtaining ductile response from shear walls. An experimental program consisting of six high-strength concrete shear walls was carried out. Specimens were tested under inplane axial load and reversed cyclic displacements with the test parameters investigated being longitudinal reinforcement ratio, transverse reinforcement ratio and axial load. Lateral loads, lateral displacements and the strains of reinforcement in edge elements and web wall were measured. The test results showed the presence of axial load has a significant effect on the strength and ductility of the shear walls. The axially loaded wall specimens exhibited a brittle behaviour regardless of reinforcement ratio whereas the specimen with no axial load had a lower strength but higher ductility. It was also found that an increase in the longitudinal reinforcement ratio gave an increase in the failure load while an increase in the transverse reinforcement ratio had no significant effect on the strength but influenced the failure mode. A non-linear finite element program based on the crack membrane model and using smeared-fixed crack approach was developed with a new aggregate interlock model incorporated into the finite element procedure. The finite element model was corroborated by experimental results of shear panels and walls. The finite element analysis of shear wall specimens indicated that while strengths can be predicted reasonably, the stiffness of edge elements has a significant effect on the deformational results for two-dimensional analyses. Therefore, to capture the deformation of walls accurately, three-dimensional finite element analyses are required. The shear wall design provisions given in the current Australian Standard and the Building Code of American Concrete Institute were compared with the experimental results. The comparison showed that the calculated strengths based on the codes are considerably conservative, specially when there exists the axial load.
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5

Zaina, Mazen Said Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Strength and ductility of fibre reinforced high strength concrete columns." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2005. http://handle.unsw.edu.au/1959.4/22054.

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The main structural objectives in column design are strength and ductility. For higher strength concretes these design objectives are offset by generally poor concrete ductility and early spalling of the concrete cover. When fibres are added to the concrete the post peak characteristics are enhanced, both in tension and in compression. Most of the available experimental data, on fibre reinforced concrete and fibre reinforced high strength concrete columns, suggest that an improvement in both ductility and load carrying capacity due to the inclusion of the fibres. In this thesis the ductility and strength of fibre reinforced high strength concrete are investigated to evaluate the effect of the different parameters on the performance of columns. The investigation includes both experimental and the numerical approaches with 56 high strength fibre reinforced concrete columns being tested. The concrete strength ranged between 80 and 100 MPa and the columns were reinforced with 1, 2 or 2.6 percent, by weight, of end hooked steel fibres. The effect of corrugated Polypropylene fibres on the column performance was also examined. No early spalling of the cover was observed in any of the steel fibre reinforced column tested in this study. A numerical model was developed for analysis of fibre and non-fibre reinforced eccentrically loaded columns. The column is modelled as finite layers of reinforced concrete. Two types of layers are used, one to represent the hinged zone and the second the unloading portion of the column. As the concrete in the hinged layers goes beyond the peak for the stress verus strain in the concrete the section will continue to deform leading to a localised region within a column. The numerical model is compared with the test data and generally shows good correlation. Using the developed model, the parameters that affect ductility in fibre-reinforced high strength concrete columns are investigated and evaluated. A design model relating column ductility with confining pressure is proposed that includes the effects of the longitudinal reinforcement ratio, the loading eccentricity and the fibre properties and content and design recommendations are given.
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6

Tantbirojn, Natee. "Fatigue testing of weldable high strength steels under simulated service conditions." Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399077.

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7

Meyer, Karl F. "Transfer and development length of 06-inch diameter prestressing strand in high strength lightweight concrete." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/20727.

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8

Chen, Ju, and 陳駒. "Behaviour of high strength steel columns at elevated temperatures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B37936554.

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9

Islam, Md Shahidul. "Shear capacity and flexural ductility of reinforced high- and normal-strength concrete beams." Thesis, Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1766536X.

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10

Malpally, Deepthi Rao. "Uncertainty Analysis of Mechanical Properties from Miniature Tensile Testing of High Strength Steels." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/4029.

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This Miniature mechanical testing study is concerned with the use of miniature specimens to identify the mechanical properties of stainless steel Type 304, sensitized Type 304 and SA516 Grade 70 carbon steel as a viable replacement for the standard sized mechanical testing. The study aims at obtaining suitable specimen geometry and tensile testing proce- dure for miniature mechanical testing whose mechanical properties are comparable to that of conventional specimens of ASTM A370-10 of the same steel. All specimens are at and the gauge length cross section will be varied to obtain suitable geometry. The miniature tensile testing results are further validated by using Monte Carlo Method (MCM) for uncertainty estimation in order to know the probability distribution of mechanical properties. Miniature specimens with a cross section of 3 mm2 and 12 mm gauge length are found to produce equiva- lent mechanical properties as tested from standard-sized specimens. If a reasonable agreement is received, it will provide us with a very useful tool to evaluate mechanical properties of de- graded materials, which cannot be removed from service for standard testing, for repair and service life evaluation.
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Книги з теми "High strength Testing"

1

Vares, Sirje. Fibre-reinforced high-strength concrete. Espoo, Finland: Technical Research Centre of Finland, 1993.

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2

Ibrahim, Hisham H. H. Flexural behavior of high strength concrete columns. Edmonton, Alta: Dept. of Civil Engineering, University of Alberta, 1994.

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3

Philleo, Robert E. Freezing and thawing resistance of high-strength concrete. Washington, D.C: Transportation Research Board, National Research Council, 1986.

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4

Carrasquillo, P. M. Guidelines for use of high strength concrete in Texas highways. Austin, Tex: Center for Transportation Research, Bureau of Engineering Research, University of Texas at Austin, 1986.

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5

Alca, Nedim. Effect of size on flexural behaviour of high-strength concrete beams. Edmonton, Alta: Dept. of Civil Engineering, University of Alberta, 1993.

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6

Kulak, Geoffrey L. A field study of fastener tension in high-strength bolts. Edmonton, Alta: Dept. of Civil Engineering, University of Alberta, 1992.

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7

Farrington, Erik Wayne. Creep and shrinkage of high performance concrete. [Austin]: Center for Transportation Research, Bureau of Engineering Research, University of Texas at Austin, 1996.

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8

Post, Daniel. High sensitivity moiré: Experimental analysis for mechanics and materials. New York: Springer-Verlag, 1994.

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9

Talja, Asko. Simplified design expressions for cold-formed channel sections. Espoo, Finland: Technical Research Centre of Finland, 1994.

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10

Masad, Eyad. Implementation of high performance concrete in Washington state. [Olympia, Wash.]: Washington State Dept. of Transportation, 2001.

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Частини книг з теми "High strength Testing"

1

Evans, W. J., and M. R. Bache. "Biaxial Fatigue Testing of a High Strength Titanium Alloy." In Fracture of Engineering Materials and Structures, 714–19. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3650-1_106.

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2

Zhao, Wen, Yingbiao Wu, Jinjin Shi, and Jinyan Liu. "Properties of Low Strength and High Fluidity Recycled Aggregates." In Infrastructure Sustainability Through New Developments in Material, Design, Construction, Maintenance, and Testing of Pavements, 47–56. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-79644-0_5.

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3

Wang, Wei-Chien, Shuei-Lien Fang, Tien-Yu Chen, Tai-Chiang Kao, Chang-Chu Liu, Yu-Yang Li, and Hoang Trung Hieu Duong. "Factors Affecting the High Early Strength Development and the Methods for Testing High Early Compressive Strength of the Rigid Pavement." In Lecture Notes in Civil Engineering, 403–15. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-87379-0_30.

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4

Raza, S., S. J. Menegon, H. H. Tsang, and J. L. Wilson. "Experimental Testing Program to Investigate the Collapse Drift Capacity of Limited Ductile High-Strength RC Columns." In Lecture Notes in Civil Engineering, 723–32. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7603-0_69.

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5

Liu, Y. B., D. Cronin, and M. Worswick. "Full-Scale Testing and Numerical Modeling of Adhesively Bonded Hot Stamped Ultra-High Strength Steel Hat Sections." In Dynamic Behavior of Materials, Volume 1, 109–12. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95089-1_18.

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6

Falvey, Peter, and David Coniam. "Concluding Comments on the Benchmarking (LPATE) Project: Strengths, Weaknesses and Constraints." In High-Stakes Testing, 399–416. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-6358-9_18.

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7

Patil, Trunal, Claudia Pagano, Roberto Marani, Tiziana D’Orazio, Giacomo Copani, and Irene Fassi. "Hyperspectral Imaging for Non-destructive Testing of Composite Materials and Defect Classification." In Lecture Notes in Mechanical Engineering, 404–12. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18326-3_39.

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AbstractCarbon fiber composite materials are intensively used in many manufacturing domains such as aerospace, aviation, marine, automation and civil industries due to their excellent strength, corrosion resistance, and lightweight properties. However, their increased use requires a conscious awareness of their entire life cycle and not only of their manufacturing. Therefore, to reduce waste and increase sustainability, reparation, reuse, or recycling are recommended in case of defects and wear. This can be largely improved with reliable and efficient non-destructive defect detection techniques; those are able to identify damages automatically for quality control inspection, supporting the definition of the best circular economy options. Hyperspectral imaging techniques provide unique features for detecting physical and chemical alterations of any material and, in this study, it is proposed to identify the constitutive material and classify local defects of composite specimens. A Middle Wave Infrared Hyperspectral Imaging (MWIR-HSI) system, able to capture spectral signatures of the specimen surfaces in a range of wavelengths between 2.6757 and 5.5056 µm, has been used. The resulting signatures feed a deep neural network with three convolutional layers that filter the input and isolate data-driven features of high significance. A complete experimental case study is presented to validate the methodology, leading to an average classification accuracy of 93.72%. This opens new potential opportunities to enable sustainable life cycle strategies for carbon fiber composite materials.
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8

Jomaa’h, Muyasser M., Ali I. Salahaldin, Qahtan A. Saber, and Aram M. Raheem. "Large Scale Laboratory Setup for Testing Structural Performance of Slender High-Strength Concrete Columns Subjected to Axial Load and Fire: A Preliminary Study." In Geotechnical Engineering and Sustainable Construction, 611–26. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6277-5_49.

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9

Tserpes, Konstantinos, Elli Moutsompegka, Mareike Schlag, Kai Brune, Christian Tornow, Ana Reguero Simón, and Romain Ecault. "Characterization of Pre-bond Contamination and Aging Effects for CFRP Bonded Joints Using Reference Laboratory Methods, Mechanical Tests, and Numerical Simulation." In Adhesive Bonding of Aircraft Composite Structures, 51–117. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_2.

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AbstractIn this chapter, the pre-bond contamination and ageing effects on carbon fiber reinforced plastic (CFRP) adherends and CFRP bonded joints are characterized by means of reference laboratory non-destructive testing (NDT) methods, mechanical tests, and numerical simulation. Contaminations from two fields of application are considered, namely in aircraft manufacturing (i.e. production) and for in-service bonded repair. The production-related scenarios comprise release agent, moisture, and fingerprint, while the repair-related scenarios comprise fingerprint, thermal degradation, de-icing fluid, and a faulty curing of the adhesive. For each scenario, three different levels of contamination were pre-set and applied, namely low, medium and high level. Furthermore, two types of samples were tested, namely coupons and pilot samples (a stiffened panel and scarf repairs). The CFRP adherends were contaminated prior to bonding and the obtained surfaces were characterized using X-ray photoelectron spectroscopy. After bonding, the joints were tested by ultrasonic testing. To characterize the effects of each contamination on the strength of the bonded joints, mode-I and mode-II fracture toughness tests, and novel centrifuge tests were conducted on the coupons, while tensile tests were performed on the scarfed samples. Additionally, numerical simulation was performed on CFRP stiffened panels under compression using the LS-DYNA finite element (FE) platform.
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10

"Behaviour of structures of high-strength steels." In Testing of Metals for Structures, 299–314. CRC Press, 1991. http://dx.doi.org/10.1201/9781482267068-32.

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Тези доповідей конференцій з теми "High strength Testing"

1

Hasenhütl, Andre, Marion Erdelen-Peppler, Christoph Kalwa, Martin Pant, and Andreas Liessem. "Crack Arrest Testing of High Strength Steels." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90120.

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Fracture propagation is a major concern for the safe operation of gas transmission pipelines. Ductile fracture resistance, which is required according to line pipe standards, is commonly assessed by Charpy impact testing. If fracture occurs during pipe operation, fracture propagation is required to appear in ductile manner. The prerequisite for this is the demonstration of sufficient shear fracture in the BDWT test and minimum required Charpy impact energy. A combination of both requirements ensures avoidance of brittle fracture as well as control of ductile fracture propagation. The experimental chain of evidence and the Battelle-Two-Curve (BTC) model which is the most widely applied model to predict resistance against fracture propagation have been developed on basis of welded pipes of grade ≤ X70. The model has been calibrated against test data obtained from pipes with Charpy impact energy values below 100 J. In recent years, new material concepts were developed to increase material strength and material toughness. On the one hand, increase in material toughness, which is evaluated by Charpy impact testing, is often achieved by an increase in crack initiation resistance. On the other hand, crack propagation resistance, which is determined by BDWT testing with an instrumented striker, can remain on the same level. Increased material toughness and crack initiation resistance can be manifested by incomplete fracture of Charpy impact specimens in the upper shelf (ductile fracture). Actual Charpy impact test standards for metallic materials do not coincide with each other regarding the validity of Charpy energy of unbroken specimens. Increased crack initiation resistance also affects fracture initiation mechanism in BDWT tests, leading to invalid test results according test standards. Invalidity can be expressed by inverse fracture appearance. To avoid inverse fracture, crack initiation energy can be reduced by changing notch type and therefore changing the constraint in the root of the notch. BDWT test standards also do not agree with each other concerning allowable notch types. While the pressed notch type is the preferred one for low toughness steels and the Chevron notch type for higher toughness steels according some test standards, other test standards allow only for a pressed notch type. Being semi-empirical by nature, the BTC concept strongly depends on the input parameters derived from different material tests. Changing test conditions can have a direct impact on the assessment results.
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2

Heikkala, Jouko A., and Anu J. Väisänen. "Usability Testing of Ultra High-Strength Steels." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82770.

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New ultra high strength (UHS) steels have been developed in order to get advantages in machine design and construction. Following benefits can be obtained for example: - less material usage due to lighter constructions; - better payload and less fuel consumption in vehicle industry; - energy saving in material production. A rough distinction of structural steels can be defined to ductile steels, with tensile strength less than 300 MPa, and high strength steels, up to 700 Mpa. A steel material can be defined as UHS steel when the tensile strength exceeds 700 MPa. Steels with yield strength of 1500 Mpa have been developed so far. UHS steels can also be divided into structural steels and wear resistant steels. With the tensile strength also the hardness increases and the tensile strain decreases. That causes several difficulties when the material is processed into products. Especially mechanical processing like bending, machining and shearing gets difficult as the material strength increases. That causes problems for the construction material users to find the proper manufacturing methods in production. In Oulu University Production Technology Laboratory material processing tests have been performed during several years in co-operation with the local steel manufacturer. The usability tests comprise mainly of bending and machining tests. Shearing and welding tests have been made to a smaller extent. Also laser treatment has been used for local heat conditioning in order to improve the bending and shearing properties, but these techniques are not yet widely used in production. The bending tests are carried out with standard bending tools and test steel plates with standard dimensions. The plate thickness varies depending on the test material. The target is to determine the reliable minimum bending radiuses whereby the plate can be bent without failure, from both sides and along the rolling direction and orthogonally to that. Also the springback angle is measured and the bent surfaces are evaluated according to several criteria. When necessary, also the mechanical testing of the formed material is carried out. The machining tests are made mainly by drilling. Also some milling tests have been performed. Drilling is a convenient way of machining testing because a substantial amount of holes can be drilled in one test plate. The drilling power can be observed precisely by monitoring the spindle power. Also a variety of different tool types can be used, from uncoated HSS drills to boring tools with indexable inserts. The optimal machining parameters (feed and speed) will be defined according to maximum tool life and minimum machining costs.
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3

Glaesemann, G. Scott. "High-speed strength testing of optical fibers." In Photonics East '95, edited by Hakan H. Yuce, Dilip K. Paul, and Roger A. Greenwell. SPIE, 1996. http://dx.doi.org/10.1117/12.230121.

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4

Clayton, Alan M., Stuart Wallace, and Nicholas Rushton. "Blast Testing a High Strength Steel Containment Vessel." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57253.

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An extensive series of tests have been carried out on an explosive containment vessel. The vessel geometry and the blast and overload tests are described, covering the experimental set up and instrumentation. Strains in the vessel are compared to calculated values using the AUTODYN explicit finite element software, showing good correlation over the first few cycles and generally good prediction of maximum strains. Leakage measurements using a carbon monoxide detector have shown that in all these tests the glass encapsulated DG O’Brien electrical penetrations through the vessel inner closure performed well. A modified version of this penetration to allow exhaust gases through the wall has also performed well and offers an alternative to NPT tapered thread connections.
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5

Jones, Thomas, William Doggett, Clarence Stanfield, and Omar Valverde. "Accelerated Creep Testing of High Strength Aramid Webbing." In 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
20th AIAA/ASME/AHS Adaptive Structures Conference
14th AIAA. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-1771.

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6

"Effects of Testing Variables on the Strength of High-Strength (90 Mpa) Concrete Cylinders." In "SP-149: High-Performance Concrete - Proceedings, International Conference Singapore, 1994". American Concrete Institute, 1994. http://dx.doi.org/10.14359/4176.

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7

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 test pressure than the original hydrostatic test. The low probability of these events, however, means that the effectiveness of the hydrostatic test is not significantly diminished in this case. Because crack growth from a pre-existing flaw is retarded in a plastically deformed material, it is also typically assumed that hydrostatic testing should not lead to accelerated crack growth. However, this does not take into account that the hydrostatic testing itself can cause some increment in crack growth and that for many higher strength pipe materials significantly large defects can survive hydrostatic testing. These longer defects can potentially grow after surviving a hydrostatic test. This paper discusses this difference in crack growth rates for cracks that have survived hydrostatic testing in different grade pipeline steels and the implications for hydrostatic testing.
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Link, Todd M., and Jeff S. Grimm. "Axial Crash Testing of Advanced High Strength Steel Tubes." In SAE 2005 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2005. http://dx.doi.org/10.4271/2005-01-0836.

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9

"Toughness of fiber-Reinforced High-Strength Concrete from Notched Beam Tests." In SP-155: Testing of Fiber Reinforced Concrete. American Concrete Institute, 1995. http://dx.doi.org/10.14359/927.

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Guo, Yong, Kai Wang, Fujie Wang, and Wencheng Xu. "Application of ultrasonic testing method in axial force testing of high-strength bolts." In 2nd International Conference on Testing Technology and Automation Engineering (TTAE 2022), edited by Yang Yue. SPIE, 2022. http://dx.doi.org/10.1117/12.2660622.

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Звіти організацій з теми "High strength Testing"

1

Xu, Tianfu. TOUGHREACT Testing in High Ionic Strength Brine Sandstone Systems. Office of Scientific and Technical Information (OSTI), September 2008. http://dx.doi.org/10.2172/941168.

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2

Lagergren, Eric S. Effects of testing variables on the measured compressive strength of high-strength (90 MPa) concrete. Gaithersburg, MD: National Institute of Standards and Technology, 1994. http://dx.doi.org/10.6028/nist.ir.5405.

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3

Phan, Long T., and Richard D. Peacock. Experimental plan for testing the mechanical properties of high-strength concrete at elevated temperatures. Gaithersburg, MD: National Institute of Standards and Technology, 1999. http://dx.doi.org/10.6028/nist.ir.6210.

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4

Seif, Mina, Jonathan Weigand, Joseph Main, Rafaela Peixoto, and Luiz Vieira. Shear behavior of high-strength bolts at elevated temperatures: testing and formulation of reduced-order model. Gaithersburg, MD: National Institute of Standards and Technology, September 2018. http://dx.doi.org/10.6028/nist.tn.1978.

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5

Moser, Robert, Preet Singh, Lawrence Kahn, Kimberly Kurtis, David González Niño, and Zackery McClelland. Crevice corrosion and environmentally assisted cracking of high-strength duplex stainless steels in simulated concrete pore solutions. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41620.

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This paper presents a study of crevice corrosion and environmentally assisted cracking (EAC) mechanisms in UNS S32205 and S32304 which were cold drawn to tensile strengths of approximately 1300 MPa. The study utilized a combination of electrochemical methods and slow strain rate testing to evaluate EAC susceptibility. UNS S32205 was not susceptible to crevice corrosion in stranded geometries at Cl⁻ concentrations up to 1.0 M in alkaline and carbonated simulated concrete pore solutions. UNS S32304 did exhibit a reduction in corrosion resistance when tested in a stranded geometry. UNS S32205 and S32304 were not susceptible to stress corrosion cracking at Cl⁻ concentrations up to 0.5 M in alkaline and carbonated solutions but were susceptible to hydrogen embrittlement with cathodic overprotection.
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6

Baker, B. R. Fabrication and Mechanical Testing of Block Shear Joints to Measure Ultimate Shear Strength in Adhesive-Bonded High Explosive (HE) Joints (Progress Summary). Office of Scientific and Technical Information (OSTI), March 2019. http://dx.doi.org/10.2172/1524741.

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7

Baral, Aniruddha, Jeffrey Roesler, M. Ley, Shinhyu Kang, Loren Emerson, Zane Lloyd, Braden Boyd, and Marllon Cook. High-volume Fly Ash Concrete for Pavements Findings: Volume 1. Illinois Center for Transportation, September 2021. http://dx.doi.org/10.36501/0197-9191/21-030.

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High-volume fly ash concrete (HVFAC) has improved durability and sustainability properties at a lower cost than conventional concrete, but its early-age properties like strength gain, setting time, and air entrainment can present challenges for application to concrete pavements. This research report helps with the implementation of HVFAC for pavement applications by providing guidelines for HVFAC mix design, testing protocols, and new tools for better quality control of HVFAC properties. Calorimeter tests were performed to evaluate the effects of fly ash sources, cement–fly ash interactions, chemical admixtures, and limestone replacement on the setting times and hydration reaction of HVFAC. To better target the initial air-entraining agent dosage for HVFAC, a calibration curve between air-entraining dosage for achieving 6% air content and fly ash foam index test has been developed. Further, a digital foam index test was developed to make this test more consistent across different labs and operators. For a more rapid prediction of hardened HVFAC properties, such as compressive strength, resistivity, and diffusion coefficient, an oxide-based particle model was developed. An HVFAC field test section was also constructed to demonstrate the implementation of a noncontact ultrasonic device for determining the final set time and ideal time to initiate saw cutting. Additionally, a maturity method was successfully implemented that estimates the in-place compressive strength of HVFAC through wireless thermal sensors. An HVFAC mix design procedure using the tools developed in this project such as the calorimeter test, foam index test, and particle-based model was proposed to assist engineers in implementing HVFAC pavements.
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8

Sparks, Paul, Jesse Sherburn, William Heard, and Brett Williams. Penetration modeling of ultra‐high performance concrete using multiscale meshfree methods. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41963.

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Terminal ballistics of concrete is of extreme importance to the military and civil communities. Over the past few decades, ultra‐high performance concrete (UHPC) has been developed for various applications in the design of protective structures because UHPC has an enhanced ballistic resistance over conventional strength concrete. Developing predictive numerical models of UHPC subjected to penetration is critical in understanding the material's enhanced performance. This study employs the advanced fundamental concrete (AFC) model, and it runs inside the reproducing kernel particle method (RKPM)‐based code known as the nonlinear meshfree analysis program (NMAP). NMAP is advantageous for modeling impact and penetration problems that exhibit extreme deformation and material fragmentation. A comprehensive experimental study was conducted to characterize the UHPC. The investigation consisted of fracture toughness testing, the utilization of nondestructive microcomputed tomography analysis, and projectile penetration shots on the UHPC targets. To improve the accuracy of the model, a new scaled damage evolution law (SDEL) is employed within the microcrack informed damage model. During the homogenized macroscopic calculation, the corresponding microscopic cell needs to be dimensionally equivalent to the mesh dimension when the partial differential equation becomes ill posed and strain softening ensues. Results of numerical investigations will be compared with results of penetration experiments.
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9

Weiss, Charles, William McGinley, Bradford Songer, Madeline Kuchinski, and Frank Kuchinski. Performance of active porcelain enamel coated fibers for fiber-reinforced concrete : the performance of active porcelain enamel coatings for fiber-reinforced concrete and fiber tests at the University of Louisville. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40683.

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A patented active porcelain enamel coating improves both the bond between the concrete and steel reinforcement as well as its corrosion resistance. A Small Business Innovation Research (SBIR) program to develop a commercial method for production of porcelain-coated fibers was developed in 2015. Market potential of this technology with its steel/concrete bond improvements and corrosion protection suggests that it can compete with other fiber reinforcing systems, with improvements in performance, durability, and cost, especially as compared to smooth fibers incorporated into concrete slabs and beams. Preliminary testing in a Phase 1 SBIR investigation indicated that active ceramic coatings on small diameter wire significantly improved the bond between the wires and the concrete to the point that the wires achieved yield before pullout without affecting the strength of the wire. As part of an SBIR Phase 2 effort, the University of Louisville under contract for Ceramics, Composites and Coatings Inc., proposed an investigation to evaluate active enamel-coated steel fibers in typical concrete applications and in masonry grouts in both tension and compression. Evaluation of the effect of the incorporation of coated fibers into Ultra-High Performance Concrete (UHPC) was examined using flexural and compressive strength testing as well as through nanoindentation.
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Wei, Fulu, Ce Wang, Xiangxi Tian, Shuo Li, and Jie Shan. Investigation of Durability and Performance of High Friction Surface Treatment. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317281.

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The Indiana Department of Transportation (INDOT) completed a total of 25 high friction surface treatment (HFST) projects across the state in 2018. This research study attempted to investigate the durability and performance of HFST in terms of its HFST-pavement system integrity and surface friction performance. Laboratory tests were conducted to determine the physical and mechanical properties of epoxy-bauxite mortar. Field inspections were carried out to identify site conditions and common early HFST distresses. Cyclic loading test and finite element method (FEM) analysis were performed to evaluate the bonding strength between HFST and existing pavement, in particular chip seal with different pretreatments such as vacuum sweeping, shotblasting, and scarification milling. Both surface friction and texture tests were undertaken periodically (generally once every 6 months) to evaluate the surface friction performance of HFST. Crash records over a 5-year period, i.e., 3 years before installation and 2 years after installation, were examined to determine the safety performance of HFST, crash modification factor (CMF) in particular. It was found that HFST epoxy-bauxite mortar has a coefficient of thermal expansion (CTE) significantly higher than those of hot mix asphalt (HMA) mixtures and Portland cement concrete (PCC), and good cracking resistance. The most common early HFST distresses in Indiana are reflective cracking, surface wrinkling, aggregate loss, and delamination. Vacuum sweeping is the optimal method for pretreating existing pavements, chip seal in particular. Chip seal in good condition is structurally capable of providing a sound base for HFST. On two-lane highway curves, HFST is capable of reducing the total vehicle crash by 30%, injury crash by 50%, and wet weather crash by 44%, and providing a CMF of 0.584 in Indiana. Great variability may arise in the results of friction tests on horizontal curves by the use of locked wheel skid tester (LWST) due both to the nature of vehicle dynamics and to the operation of test vehicle. Texture testing, however, is capable of providing continuous texture measurements that can be used to calculate a texture height parameter, i.e., mean profile depth (MPD), not only for evaluating friction performance but also implementing quality control (QC) and quality assurance (QA) plans for HFST.
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